# S7 Out \[Send the Variable List in Run Time\]

**URL:** <https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515>\
**Category:** Industrial\
**Created:** [5 June 2024 08:29 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515 "2024-06-05T08:29:03Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mohamed\_1711](https://avatars.discourse-cdn.com/v4/letter/m/eb9ed0/32.png) [@Mohamed\_1711](https://discourse.nodered.org/u/Mohamed_1711)\
**Post date:** [5 June 2024 08:29 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/1 "2024-06-05T08:29:03Z")

</div>

To write in PLC using S7 Out I have to write all Variables in it and before this code, I have to make to array one for variables and another for values (payload)

Desired Output: I want to remove the variables from the S7 out and send it from the prepare Data function.

 ![Flow Picture](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/3/6/36be6f9fc390f8f2daff78c956cfdb6d242082dd.png)

```auto
[
    {
        "id": "247e3fda1f9e7969",
        "type": "inject",
        "z": "4b831203ffade23e",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 280,
        "y": 260,
        "wires": [
            [
                "31c124bf7d9a7e81"
            ]
        ]
    },
    {
        "id": "74629abe4d903824",
        "type": "function",
        "z": "4b831203ffade23e",
        "name": "Prepare Data",
        "func": "msg.payload = [msg.payload[0].Program_ID,\nmsg.payload[0].JOB_ID,\nmsg.payload[0].Length];\nmsg.variable = [\n 'PROGRAM',\n 'JOB',\n 'LENGTH'\n];\nreturn msg;\n",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 810,
        "y": 260,
        "wires": [
            [
                "3fefac4934f9933f"
            ]
        ]
    },
    {
        "id": "3b0dab24c63581d8",
        "type": "MSSQL",
        "z": "4b831203ffade23e",
        "mssqlCN": "4c7d57acebd0dde5",
        "name": "",
        "outField": "payload",
        "returnType": 0,
        "throwErrors": 1,
        "query": "SELECT TOP 1 Program_ID\r\n,JOB_ID\r\n,Length\r\n,LEFT(JOB_CODE, 40) AS JOB_CODE\r\n,LEFT((LEFT(HEAT_CODE, CHARINDEX('**', HEAT_CODE) - 1)), 30) AS HEAT_CODE\r\nFROM PRD_BUNDLE_5\r\nORDER BY ID DESC",
        "modeOpt": "queryMode",
        "modeOptType": "query",
        "queryOpt": "payload",
        "queryOptType": "msg",
        "paramsOpt": "queryParams",
        "paramsOptType": "msg",
        "rows": "rows",
        "rowsType": "msg",
        "parseMustache": true,
        "params": [],
        "x": 580,
        "y": 260,
        "wires": [
            [
                "74629abe4d903824",
                "54a129af06f067ae"
            ]
        ]
    },
    {
        "id": "31c124bf7d9a7e81",
        "type": "function",
        "z": "4b831203ffade23e",
        "name": "Query",
        "func": "msg.payload = `SELECT TOP 1 Program_ID\n,JOB_ID\n,Length\n,LEFT(JOB_CODE, 40) AS JOB_CODE\n,LEFT((LEFT(HEAT_CODE, CHARINDEX('**', HEAT_CODE) - 1)), 30) AS HEAT_CODE\nFROM PRD_BUNDLE_5\nORDER BY ID DESC`\n\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 410,
        "y": 260,
        "wires": [
            [
                "3b0dab24c63581d8"
            ]
        ]
    },
    {
        "id": "3fefac4934f9933f",
        "type": "s7 out",
        "z": "4b831203ffade23e",
        "endpoint": "1dc3de29454f834f",
        "variable": "",
        "name": "Write on Datablock DB1010 on PLC E63",
        "x": 1080,
        "y": 260,
        "wires": []
    },
    {
        "id": "acef96b68e69f3b2",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "PROGRAM",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload.value[0]",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 910,
        "y": 440,
        "wires": []
    },
    {
        "id": "2dc94d561f26692d",
        "type": "inject",
        "z": "4b831203ffade23e",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 440,
        "y": 500,
        "wires": [
            [
                "0a38762e95466403",
                "6317c8e82f50273e",
                "7cc1ccbc7533d728"
            ]
        ]
    },
    {
        "id": "0a38762e95466403",
        "type": "s7comm read",
        "z": "4b831203ffade23e",
        "connection": "cb814bd938d11a92",
        "payload": "{\"S7_Type\":\"DB\",\"S7_DBnum\":\"1010\",\"S7_Datatype\":\"DI\",\"S7_Offset\":\"102\",\"S7_BitOffset\":\"0\",\"S7_Quantity\":\"1\",\"S7_Name\":\"PROGRAM\"}",
        "s7Name": "PROGRAM",
        "topic": "",
        "name": "READ PROGRAM",
        "signalSetted": false,
        "none": "true",
        "repeat": "",
        "once": false,
        "x": 730,
        "y": 440,
        "wires": [
            [
                "acef96b68e69f3b2"
            ]
        ]
    },
    {
        "id": "d0d9eb5006fd4653",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "JOB",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload.value[0]",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 890,
        "y": 500,
        "wires": []
    },
    {
        "id": "6317c8e82f50273e",
        "type": "s7comm read",
        "z": "4b831203ffade23e",
        "connection": "cb814bd938d11a92",
        "payload": "{\"S7_Type\":\"DB\",\"S7_DBnum\":\"1010\",\"S7_Datatype\":\"DI\",\"S7_Offset\":\"106\",\"S7_BitOffset\":\"0\",\"S7_Quantity\":\"1\",\"S7_Name\":\"JOB\"}",
        "s7Name": "JOB",
        "topic": "",
        "name": "READ JOB",
        "signalSetted": false,
        "none": "true",
        "repeat": "",
        "once": false,
        "x": 710,
        "y": 500,
        "wires": [
            [
                "d0d9eb5006fd4653"
            ]
        ]
    },
    {
        "id": "6875b4aeb3ef8052",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "LENGTH",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload.value[0]",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 900,
        "y": 580,
        "wires": []
    },
    {
        "id": "7cc1ccbc7533d728",
        "type": "s7comm read",
        "z": "4b831203ffade23e",
        "connection": "cb814bd938d11a92",
        "payload": "{\"S7_Type\":\"DB\",\"S7_DBnum\":\"1010\",\"S7_Datatype\":\"DI\",\"S7_Offset\":\"110\",\"S7_BitOffset\":\"0\",\"S7_Quantity\":\"1\",\"S7_Name\":\"LENGTH\"}",
        "s7Name": "LENGTH",
        "topic": "",
        "name": "READ LENGTH",
        "signalSetted": false,
        "none": "true",
        "repeat": "",
        "once": false,
        "x": 720,
        "y": 580,
        "wires": [
            [
                "6875b4aeb3ef8052"
            ]
        ]
    },
    {
        "id": "54a129af06f067ae",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "debug 2",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 780,
        "y": 200,
        "wires": []
    },
    {
        "id": "4c7d57acebd0dde5",
        "type": "MSSQL-CN",
        "z": "4b831203ffade23e",
        "tdsVersion": "7_4",
        "name": "Connection_RML",
        "server": "172.31.51.100",
        "port": "1433",
        "encyption": false,
        "trustServerCertificate": false,
        "database": "SUEZSTEELRM_RML",
        "useUTC": false,
        "connectTimeout": "15000",
        "requestTimeout": "15000",
        "cancelTimeout": "5000",
        "pool": "5",
        "parseJSON": false,
        "enableArithAbort": true
    },
    {
        "id": "1dc3de29454f834f",
        "type": "s7 endpoint",
        "transport": "iso-on-tcp",
        "address": "172.31.51.13",
        "port": "102",
        "rack": "0",
        "slot": "4",
        "localtsaphi": "01",
        "localtsaplo": "00",
        "remotetsaphi": "01",
        "remotetsaplo": "00",
        "connmode": "rack-slot",
        "adapter": "",
        "busaddr": "2",
        "cycletime": "1000",
        "timeout": "2000",
        "name": "Write on DatablocK DB1010 on PLC E63",
        "vartable": [
            {
                "addr": "DB1010,DINT102",
                "name": "PROGRAM"
            },
            {
                "addr": "DB1010,DINT106",
                "name": "JOB"
            },
            {
                "addr": "DB1010,DINT110",
                "name": "LENGTH"
            }
        ]
    },
    {
        "id": "cb814bd938d11a92",
        "type": "s7comm",
        "ip": "172.31.51.13",
        "port": "102",
        "rack": "0",
        "slot": "4",
        "payload": [
            {
                "S7_Type": "DB",
                "S7_DBnum": "1010",
                "S7_Datatype": "DI",
                "S7_Offset": "102",
                "S7_BitOffset": "0",
                "S7_Quantity": "1",
                "S7_Name": "PROGRAM"
            },
            {
                "S7_Type": "DB",
                "S7_DBnum": "1010",
                "S7_Datatype": "DI",
                "S7_Offset": "106",
                "S7_BitOffset": "0",
                "S7_Quantity": "1",
                "S7_Name": "JOB"
            },
            {
                "S7_Type": "DB",
                "S7_DBnum": "1010",
                "S7_Datatype": "DI",
                "S7_Offset": "110",
                "S7_BitOffset": "0",
                "S7_Quantity": "1",
                "S7_Name": "LENGTH"
            }
        ]
    }
]

```

---

<div class="post-metadata">

**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [5 June 2024 08:40 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/2 "2024-06-05T08:40:45Z")

</div>

Hi,

It doesn't help anyone you including the PLC node.

I am missing what you mean.

I get a payload which looks like:

```auto
[{"variable":"DB1010,DINT102","value":55},{"variable":"DB1010,DINT110","value":1200}]

```

I can't see any `S7` in there.

Reading - again - your post, you want to get TWO messages and combine them into one and send it out.

In your new example flow, get/use two `inject` nodes that send the two messages and do NOT include the PLC node.

Actually, (sorry), just paste the two messages you want to combine.

That may be easier for anyone to look at and suggest solutions.

---

<div class="post-metadata">

**Author:** ![Mohamed\_1711](https://avatars.discourse-cdn.com/v4/letter/m/eb9ed0/32.png) [@Mohamed\_1711](https://discourse.nodered.org/u/Mohamed_1711)\
**Post date:** [5 June 2024 11:33 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/3 "2024-06-05T11:33:55Z")

</div>

I upload the  
[Write json code of flow.txt](https://discourse.nodered.org/uploads/short-url/wQgDn5g7xyE6o8Lv9YQ3lnEr2bE.txt) (9.8 KB)  
wrong json....So Sorry

```auto
[
    {
        "id": "247e3fda1f9e7969",
        "type": "inject",
        "z": "4b831203ffade23e",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 280,
        "y": 260,
        "wires": [
            [
                "31c124bf7d9a7e81"
            ]
        ]
    },
    {
        "id": "74629abe4d903824",
        "type": "function",
        "z": "4b831203ffade23e",
        "name": "Prepare Data",
        "func": "msg.payload = [msg.payload[0].Program_ID,\nmsg.payload[0].JOB_ID,\nmsg.payload[0].Length];\nmsg.variable = [\n 'PROGRAM',\n 'JOB',\n 'LENGTH'\n];\nreturn msg;\n",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 810,
        "y": 260,
        "wires": [
            [
                "3fefac4934f9933f"
            ]
        ]
    },
    {
        "id": "3b0dab24c63581d8",
        "type": "MSSQL",
        "z": "4b831203ffade23e",
        "mssqlCN": "4c7d57acebd0dde5",
        "name": "",
        "outField": "payload",
        "returnType": 0,
        "throwErrors": 1,
        "query": "SELECT TOP 1 Program_ID\r\n,JOB_ID\r\n,Length\r\n,LEFT(JOB_CODE, 40) AS JOB_CODE\r\n,LEFT((LEFT(HEAT_CODE, CHARINDEX('**', HEAT_CODE) - 1)), 30) AS HEAT_CODE\r\nFROM PRD_BUNDLE_5\r\nORDER BY ID DESC",
        "modeOpt": "queryMode",
        "modeOptType": "query",
        "queryOpt": "payload",
        "queryOptType": "msg",
        "paramsOpt": "queryParams",
        "paramsOptType": "msg",
        "rows": "rows",
        "rowsType": "msg",
        "parseMustache": true,
        "params": [],
        "x": 580,
        "y": 260,
        "wires": [
            [
                "74629abe4d903824",
                "54a129af06f067ae"
            ]
        ]
    },
    {
        "id": "31c124bf7d9a7e81",
        "type": "function",
        "z": "4b831203ffade23e",
        "name": "Query",
        "func": "msg.payload = `SELECT TOP 1 Program_ID\n,JOB_ID\n,Length\n,LEFT(JOB_CODE, 40) AS JOB_CODE\n,LEFT((LEFT(HEAT_CODE, CHARINDEX('**', HEAT_CODE) - 1)), 30) AS HEAT_CODE\nFROM PRD_BUNDLE_5\nORDER BY ID DESC`\n\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 410,
        "y": 260,
        "wires": [
            [
                "3b0dab24c63581d8"
            ]
        ]
    },
    {
        "id": "3fefac4934f9933f",
        "type": "s7 out",
        "z": "4b831203ffade23e",
        "endpoint": "1dc3de29454f834f",
        "variable": "",
        "name": "Write on Datablock DB1010 on PLC E63",
        "x": 1080,
        "y": 260,
        "wires": []
    },
    {
        "id": "acef96b68e69f3b2",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "PROGRAM",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload.value[0]",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 910,
        "y": 440,
        "wires": []
    },
    {
        "id": "2dc94d561f26692d",
        "type": "inject",
        "z": "4b831203ffade23e",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 440,
        "y": 500,
        "wires": [
            [
                "0a38762e95466403",
                "6317c8e82f50273e",
                "7cc1ccbc7533d728"
            ]
        ]
    },
    {
        "id": "0a38762e95466403",
        "type": "s7comm read",
        "z": "4b831203ffade23e",
        "connection": "cb814bd938d11a92",
        "payload": "{\"S7_Type\":\"DB\",\"S7_DBnum\":\"1010\",\"S7_Datatype\":\"DI\",\"S7_Offset\":\"102\",\"S7_BitOffset\":\"0\",\"S7_Quantity\":\"1\",\"S7_Name\":\"PROGRAM\"}",
        "s7Name": "PROGRAM",
        "topic": "",
        "name": "READ PROGRAM",
        "signalSetted": false,
        "none": "true",
        "repeat": "",
        "once": false,
        "x": 730,
        "y": 440,
        "wires": [
            [
                "acef96b68e69f3b2"
            ]
        ]
    },
    {
        "id": "d0d9eb5006fd4653",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "JOB",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload.value[0]",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 890,
        "y": 500,
        "wires": []
    },
    {
        "id": "6317c8e82f50273e",
        "type": "s7comm read",
        "z": "4b831203ffade23e",
        "connection": "cb814bd938d11a92",
        "payload": "{\"S7_Type\":\"DB\",\"S7_DBnum\":\"1010\",\"S7_Datatype\":\"DI\",\"S7_Offset\":\"106\",\"S7_BitOffset\":\"0\",\"S7_Quantity\":\"1\",\"S7_Name\":\"JOB\"}",
        "s7Name": "JOB",
        "topic": "",
        "name": "READ JOB",
        "signalSetted": false,
        "none": "true",
        "repeat": "",
        "once": false,
        "x": 710,
        "y": 500,
        "wires": [
            [
                "d0d9eb5006fd4653"
            ]
        ]
    },
    {
        "id": "6875b4aeb3ef8052",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "LENGTH",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload.value[0]",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 900,
        "y": 580,
        "wires": []
    },
    {
        "id": "7cc1ccbc7533d728",
        "type": "s7comm read",
        "z": "4b831203ffade23e",
        "connection": "cb814bd938d11a92",
        "payload": "{\"S7_Type\":\"DB\",\"S7_DBnum\":\"1010\",\"S7_Datatype\":\"DI\",\"S7_Offset\":\"110\",\"S7_BitOffset\":\"0\",\"S7_Quantity\":\"1\",\"S7_Name\":\"LENGTH\"}",
        "s7Name": "LENGTH",
        "topic": "",
        "name": "READ LENGTH",
        "signalSetted": false,
        "none": "true",
        "repeat": "",
        "once": false,
        "x": 720,
        "y": 580,
        "wires": [
            [
                "6875b4aeb3ef8052"
            ]
        ]
    },
    {
        "id": "54a129af06f067ae",
        "type": "debug",
        "z": "4b831203ffade23e",
        "name": "debug 2",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 780,
        "y": 200,
        "wires": []
    },
    {
        "id": "4c7d57acebd0dde5",
        "type": "MSSQL-CN",
        "z": "4b831203ffade23e",
        "tdsVersion": "7_4",
        "name": "Connection_RML",
        "server": "172.31.51.100",
        "port": "1433",
        "encyption": false,
        "trustServerCertificate": false,
        "database": "SUEZSTEELRM_RML",
        "useUTC": false,
        "connectTimeout": "15000",
        "requestTimeout": "15000",
        "cancelTimeout": "5000",
        "pool": "5",
        "parseJSON": false,
        "enableArithAbort": true
    },
    {
        "id": "1dc3de29454f834f",
        "type": "s7 endpoint",
        "transport": "iso-on-tcp",
        "address": "172.31.51.13",
        "port": "102",
        "rack": "0",
        "slot": "4",
        "localtsaphi": "01",
        "localtsaplo": "00",
        "remotetsaphi": "01",
        "remotetsaplo": "00",
        "connmode": "rack-slot",
        "adapter": "",
        "busaddr": "2",
        "cycletime": "1000",
        "timeout": "2000",
        "name": "Write on DatablocK DB1010 on PLC E63",
        "vartable": [
            {
                "addr": "DB1010,DINT102",
                "name": "PROGRAM"
            },
            {
                "addr": "DB1010,DINT106",
                "name": "JOB"
            },
            {
                "addr": "DB1010,DINT110",
                "name": "LENGTH"
            }
        ]
    },
    {
        "id": "cb814bd938d11a92",
        "type": "s7comm",
        "ip": "172.31.51.13",
        "port": "102",
        "rack": "0",
        "slot": "4",
        "payload": [
            {
                "S7_Type": "DB",
                "S7_DBnum": "1010",
                "S7_Datatype": "DI",
                "S7_Offset": "102",
                "S7_BitOffset": "0",
                "S7_Quantity": "1",
                "S7_Name": "PROGRAM"
            },
            {
                "S7_Type": "DB",
                "S7_DBnum": "1010",
                "S7_Datatype": "DI",
                "S7_Offset": "106",
                "S7_BitOffset": "0",
                "S7_Quantity": "1",
                "S7_Name": "JOB"
            },
            {
                "S7_Type": "DB",
                "S7_DBnum": "1010",
                "S7_Datatype": "DI",
                "S7_Offset": "110",
                "S7_BitOffset": "0",
                "S7_Quantity": "1",
                "S7_Name": "LENGTH"
            }
        ]
    }
]

```

---

<div class="post-metadata">

**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [5 June 2024 20:52 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/4 "2024-06-05T20:52:26Z")

</div>

So sorry, is that a _valid_ flow for your problem or not?

If not, delete it - as you are the one who created it - and put the one which is.

No worries.

We all make mistakes.

---

<div class="post-metadata">

**Author:** ![Mohamed\_1711](https://avatars.discourse-cdn.com/v4/letter/m/eb9ed0/32.png) [@Mohamed\_1711](https://discourse.nodered.org/u/Mohamed_1711)\
**Post date:** [6 June 2024 06:09 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/5 "2024-06-06T06:09:36Z")

</div>

Yes .. it valid  
In my Code, I enter the Variable List twice

1. one in the S7 out
2. second I enter in the Prepare Data set the variable name and its value

---

<div class="post-metadata">

**Author:** ![Trying\_to\_learn](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/trying_to_learn/32/28400_2.png) [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Post date:** [6 June 2024 06:13 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/6 "2024-06-06T06:13:38Z")

</div>

You seem to have two other threads active too.

I think this is kind of out dated by the others.

---

<div class="post-metadata">

**Author:** ![gdziuba](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/gdziuba/32/81398_2.png) [@gdziuba](https://discourse.nodered.org/u/gdziuba)\
**Post date:** [6 June 2024 15:56 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/7 "2024-06-06T15:56:11Z")

</div>

Have you tested it out sending the data as single data point instead of an array. I am not 100 percent sure that it can take an array. I could be wrong, but these would be the troubleshooting steps I would take.

It looks to me that it would take the array instead as separate messages.

> - **All variables, one per message:** Like the _Single variable_ mode, but for all variables configured. If _diff_ is checked, a message is sent everytime any variable changes. If _diff_ is unchecked, one message is sent for every variable, in every cycle. Care must be taken about the number of messages per second in this mode.

Grey

---

<div class="post-metadata">

**Author:** ![KarolisL](https://avatars.discourse-cdn.com/v4/letter/k/a4c791/32.png) [@KarolisL](https://discourse.nodered.org/u/KarolisL)\
**Post date:** [7 June 2024 06:27 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/8 "2024-06-07T06:27:53Z")

</div>

Just to clarify:  
Do you want to send dynamic variables (address assigned to variable symbolic name changes)?  
Do you want to have a complete list of variables in S7out (Var1,Var2,Var3....) and just point to your desired variable (Var1,Var3) with function node?

```auto
[{"id":"ffc412ca.67fd4","type":"s7 in","z":"8fac4a2949790ae2","endpoint":"9305c140.f7da9","mode":"single","variable":"SEND.STATUS1","diff":true,"name":"","x":220,"y":1760,"wires":[["61abca25.ceea64"]]},{"id":"8cf7aa4b.2f2938","type":"change","z":"8fac4a2949790ae2","name":"","rules":[{"t":"set","p":"variable","pt":"msg","to":"topic","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":556,"y":1756,"wires":[["a8de828b.5c4a2"]]},{"id":"61abca25.ceea64","type":"function","z":"8fac4a2949790ae2","name":"SEND","func":"var topic = msg.topic\nvar value = msg.payload;\n\nvar arr_topic = topic.split(\".\")\narr_topic[0] = arr_topic[0].toUpperCase();\nif (arr_topic[0] == \"SEND\")\n{\n var new_topic = \"RCV.\"+arr_topic[1]\n msg.topic = new_topic;\n msg.payload = value;\n return msg;\n}","outputs":1,"noerr":0,"x":387,"y":1760,"wires":[["8cf7aa4b.2f2938","8af06c87.7f91"]]},{"id":"a8de828b.5c4a2","type":"s7 out","z":"8fac4a2949790ae2","endpoint":"79d98792.3696f8","variable":"","name":"","x":724,"y":1753,"wires":[]},{"id":"8af06c87.7f91","type":"debug","z":"8fac4a2949790ae2","name":"","active":false,"console":"false","complete":"true","x":580,"y":1804,"wires":[]},{"id":"e6feaac8.f5d228","type":"s7 in","z":"8fac4a2949790ae2","endpoint":"9305c140.f7da9","mode":"single","variable":"SEND.STATUS2","diff":true,"name":"","x":219,"y":1806,"wires":[["61abca25.ceea64"]]},{"id":"9305c140.f7da9","type":"s7 endpoint","address":"192.168.1.161","port":"102","rack":"0","slot":"2","localtsaphi":"01","localtsaplo":"00","remotetsaphi":"01","remotetsaplo":"00","connmode":"rack-slot","cycletime":"500","timeout":"2000","name":"OCME","vartable":[{"addr":"DB9,X128.0","name":"RCV.Data_save"},{"addr":"DB9,X128.1","name":"RCV.Data_delete"},{"addr":"DB9,X128.2","name":"RCV.Auto1"},{"addr":"DB9,X128.3","name":"RCV.Manual1"},{"addr":"DB9,X128.4","name":"RCV.Auto2"},{"addr":"DB9,X128.5","name":"RCV.Manual2"},{"addr":"DB9,X128.6","name":"RCV.Auto3"},{"addr":"DB9,X128.7","name":"RCV.Manual3"},{"addr":"DB9,X129.0","name":"RCV.M505_ManFw"},{"addr":"DB9,X129.1","name":"RCV.M505_ManBw"},{"addr":"DB9,X129.2","name":"RCV.M520_ManFw"},{"addr":"DB9,X129.3","name":"RCV.M520_ManBw"},{"addr":"DB9,X129.4","name":"RCV.M525_ManFw"},{"addr":"DB9,X129.5","name":"RCV.M525_ManBw"},{"addr":"DB9,X129.6","name":"RCV.M545_ManFw"},{"addr":"DB9,X129.7","name":"RCV.M545_ManBw"},{"addr":"DB9,X130.0","name":"RCV.Cmd0"},{"addr":"DB9,X130.1","name":"RCV.Cmd1"},{"addr":"DB9,X130.2","name":"RCV.Cmd2"},{"addr":"DB9,X130.3","name":"RCV.Cmd3"},{"addr":"DB9,X130.4","name":"RCV.Cmd4"},{"addr":"DB9,X130.5","name":"RCV.Cmd5"},{"addr":"DB9,X130.6","name":"RCV.Cmd6"},{"addr":"DB9,X130.7","name":"RCV.Cmd7"},{"addr":"DB9,X131.0","name":"RCV.Cmd8"},{"addr":"DB9,X131.1","name":"RCV.Cmd9"},{"addr":"DB9,X131.2","name":"RCV.Cmd10"},{"addr":"DB9,X131.3","name":"RCV.Cmd11"},{"addr":"DB9,X131.4","name":"RCV.Cmd12"},{"addr":"DB9,X131.5","name":"RCV.Cmd13"},{"addr":"DB9,X131.6","name":"RCV.Cmd14"},{"addr":"DB9,X131.7","name":"RCV.Cmd15"},{"addr":"DB9,INT132","name":"RCV.POS_NO"},{"addr":"DB9,INT134","name":"RCV.SPARE"},{"addr":"DB9,INT136","name":"RCV.SPARE1"},{"addr":"DB9,INT138","name":"RCV.SPARE2"},{"addr":"DB9,INT140","name":"RCV.SPARE3"},{"addr":"DB9,INT142","name":"RCV.SPARE4"},{"addr":"DB9,INT144","name":"RCV.SPARE5"},{"addr":"DB9,DINT148","name":"RCV.PALLET_ID"},{"addr":"DB9,INT156","name":"RCV.PALLET_PRESENCE"},{"addr":"DB9,INT226","name":"RCV.LINE_ID"},{"addr":"DB9,INT158","name":"RCV.WRAP"},{"addr":"DB9,INT162","name":"RCV.STACKER_EN"},{"addr":"DB9,INT228","name":"RCV.PALLET_FULL"},{"addr":"DB9,DWORD0","name":"SEND.STATUS1"},{"addr":"DB9,DWORD4","name":"SEND.STATUS2"},{"addr":"DB9,DWORD8","name":"SEND.ALARMS"},{"addr":"DB9,INT12","name":"SEND.ZONE1"},{"addr":"DB9,INT14","name":"SEND.ZONE2"},{"addr":"DB9,INT16","name":"SEND.ZONE3"},{"addr":"DB9,INT18","name":"SEND.SPARE"},{"addr":"DB9,INT20","name":"SEND.SPARE1"},{"addr":"DB9,INT22","name":"SEND.SPARE2"},{"addr":"DB9,INT24","name":"SEND.SPARE3"},{"addr":"DB9,INT26","name":"SEND.SPARE4"},{"addr":"DB9,DINT30","name":"SEND.PALLET_ID"},{"addr":"DB9,INT38","name":"SEND.PALLET_PRESENCE"},{"addr":"DB9,INT108","name":"SEND.LINE_ID"},{"addr":"DB9,INT40","name":"SEND.WRAP"},{"addr":"DB9,INT44","name":"SEND.STACKER_EN"},{"addr":"DB9,INT110","name":"SEND.PALLET_FULL"}]},{"id":"79d98792.3696f8","type":"s7 endpoint","transport":"iso-on-tcp","address":"10.88.2.10","port":"102","rack":"0","slot":"1","localtsaphi":"01","localtsaplo":"00","remotetsaphi":"01","remotetsaplo":"00","connmode":"rack-slot","adapter":"","busaddr":"","cycletime":"500","timeout":"2000","name":"H_HMI","vartable":[{"addr":"DB99,DWORD0","name":"RCV.STATUS1"},{"addr":"DB99,DWORD4","name":"RCV.STATUS2"},{"addr":"DB99,DWORD8","name":"RCV.ALARMS"},{"addr":"DB99,INT12","name":"RCV.ZONE1"}]}]

```

![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/a/8/a8ae3df315ca584184c94468d5a7510a6fa03fc4.png)

Here is example where I point into defined variables. But it is only for single variables, so not fully what you need. It just passes data from one endpoint to another.

As for array of variables I can only suggest to try what is written under node details:  
 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/d/2/d2706f66e43c73052881eff704ef308edbcb4712.png)

so my guess: `msg.variable = ["VAR1", "VAR2"] msg.payload = [0,1] return msg;`

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [6 August 2024 06:28 UTC](https://discourse.nodered.org/t/s7-out-send-the-variable-list-in-run-time/88515/9 "2024-08-06T06:28:44Z")

</div>

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