I want do increase or decrease the trigger delay of the trigger node with a numeric dashbord node.
Tried it, but found no solution 
Well you get a number from the dashboard input and you can define the delay duration by passing msg.delay (in milliseconds).
So on the face of it you only need a change node to move msg.payload to msg.delay and pass it to the trigger.
What have you tried? A screen capture would be helpful, or export the flow and share it here.
[
{
"id": "a9047d12fa234120",
"type": "inject",
"z": "473c8fa3989deff6",
"name": "set \"on\" at start",
"props": [
{
"p": "payload"
}
],
"repeat": "",
"crontab": "",
"once": true,
"onceDelay": "5",
"topic": "",
"payload": "start",
"payloadType": "str",
"x": 140,
"y": 240,
"wires": [
[
"0769e7dc9c67f5d5"
]
]
},
{
"id": "4b077208ef2e8847",
"type": "http request",
"z": "473c8fa3989deff6",
"name": "",
"method": "GET",
"ret": "bin",
"paytoqs": "body",
"url": "http://192.168.178.70/api/livedata/status",
"tls": "",
"persist": false,
"proxy": "",
"insecureHTTPParser": false,
"authType": "",
"senderr": false,
"headers": [
{
"keyType": "other",
"keyValue": "",
"valueType": "other",
"valueValue": ""
},
{
"keyType": "other",
"keyValue": "",
"valueType": "other",
"valueValue": ""
}
],
"x": 490,
"y": 340,
"wires": [
[
"8827c9c4fa19d2ef"
]
]
},
{
"id": "5c8d33c1298ecf74",
"type": "ui_numeric",
"z": "473c8fa3989deff6",
"name": "",
"label": "Messintervall",
"tooltip": "",
"group": "b0bb6380880c3925",
"order": 2,
"width": 0,
"height": 0,
"wrap": false,
"passthru": true,
"topic": "payload",
"topicType": "msg",
"format": "{{value|number:0}}",
"min": 0,
"max": "60000",
"step": "1000",
"x": 110,
"y": 580,
"wires": [
[
"4a316524e4a56171"
]
]
},
{
"id": "12367ecbefd0b914",
"type": "inject",
"z": "473c8fa3989deff6",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "start",
"payloadType": "str",
"x": 90,
"y": 460,
"wires": [
[
"dc4a337fe49c0b50"
]
]
},
{
"id": "9946fadd95472053",
"type": "inject",
"z": "473c8fa3989deff6",
"name": "",
"repeat": "",
"crontab": "",
"once": false,
"onceDelay": 0.1,
"topic": "",
"payload": "stop",
"payloadType": "str",
"x": 90,
"y": 510,
"wires": [
[
"dc4a337fe49c0b50"
]
]
},
{
"id": "dc4a337fe49c0b50",
"type": "trigger",
"z": "473c8fa3989deff6",
"name": "",
"op1": "1",
"op2": "",
"op1type": "str",
"op2type": "nul",
"duration": "-30",
"extend": false,
"overrideDelay": true,
"units": "s",
"reset": "stop",
"bytopic": "all",
"topic": "payload",
"outputs": 1,
"x": 330,
"y": 460,
"wires": [
[
"4b077208ef2e8847"
]
]
},
{
"id": "0769e7dc9c67f5d5",
"type": "ui_switch",
"z": "473c8fa3989deff6",
"name": "PV Messung on/off",
"label": "<font size=4>Messung on/off",
"tooltip": "",
"group": "3a4b73319cf121be",
"order": 1,
"width": "6",
"height": "1",
"passthru": true,
"decouple": "false",
"topic": "payload",
"topicType": "msg",
"style": "",
"onvalue": "start",
"onvalueType": "str",
"onicon": "",
"oncolor": "",
"offvalue": "stop",
"offvalueType": "str",
"officon": "",
"offcolor": "",
"animate": false,
"x": 150,
"y": 360,
"wires": [
[
"dc4a337fe49c0b50"
]
]
},
{
"id": "4a316524e4a56171",
"type": "change",
"z": "473c8fa3989deff6",
"name": "",
"rules": [
{
"t": "set",
"p": "payload",
"pt": "msg",
"to": "delay",
"tot": "flow"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 290,
"y": 580,
"wires": [
[
"dc4a337fe49c0b50"
]
]
},
{
"id": "b0bb6380880c3925",
"type": "ui_group",
"name": "Dahboard",
"tab": "fbfd90158448f12f",
"order": 1,
"disp": true,
"width": "6",
"collapse": false
},
{
"id": "3a4b73319cf121be",
"type": "ui_group",
"name": "PV Gesamt",
"tab": "b1421016ef9b0241",
"order": 1,
"disp": true,
"width": 6,
"collapse": false
},
{
"id": "fbfd90158448f12f",
"type": "ui_tab",
"name": "Einstellungen",
"icon": "dashboard",
"order": 3,
"disabled": false,
"hidden": false
},
{
"id": "b1421016ef9b0241",
"type": "ui_tab",
"name": "PV Dashboard",
"icon": "dashboard",
"order": 1,
"disabled": false,
"hidden": false
}
]
Try this simple flow.
See that setting the value of trigger delay is separated from actually using the trigger.
[{"id":"3ae6dc04b0424b83","type":"trigger","z":"09deee63c1b960f7","name":"","op1":"START","op2":"STOP","op1type":"str","op2type":"str","duration":"1000","extend":false,"overrideDelay":true,"units":"ms","reset":"","bytopic":"all","topic":"topic","outputs":1,"x":680,"y":1500,"wires":[["de7e01c12f7864f0"]]},{"id":"2c29924e99e0baf8","type":"ui_button","z":"09deee63c1b960f7","name":"","group":"08ac9b242ae51e8c","order":12,"width":0,"height":0,"passthru":false,"label":"trigger","tooltip":"","color":"","bgcolor":"","className":"","icon":"","payload":"","payloadType":"str","topic":"topic","topicType":"msg","x":130,"y":1520,"wires":[["f2e2fc4ed2a5a217"]]},{"id":"76aae935b0a42e7d","type":"change","z":"09deee63c1b960f7","name":"set delay","rules":[{"t":"set","p":"delay","pt":"msg","to":"triggerDelay","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":480,"y":1500,"wires":[["3ae6dc04b0424b83"]]},{"id":"0f824e4ad74d7d0c","type":"ui_numeric","z":"09deee63c1b960f7","name":"","label":"trigger delay","tooltip":"","group":"08ac9b242ae51e8c","order":13,"width":0,"height":0,"wrap":false,"passthru":true,"topic":"topic","topicType":"msg","format":"{{value}}","min":"1000","max":"10000","step":"100","className":"","x":150,"y":1440,"wires":[["2c7206f9e8c87107"]]},{"id":"2c7206f9e8c87107","type":"change","z":"09deee63c1b960f7","name":"store trgger delay","rules":[{"t":"set","p":"triggerDelay","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":510,"y":1440,"wires":[[]]},{"id":"f2e2fc4ed2a5a217","type":"switch","z":"09deee63c1b960f7","name":"check if delay exists","property":"triggerDelay","propertyType":"flow","rules":[{"t":"nnull"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":300,"y":1520,"wires":[["76aae935b0a42e7d"],["a7bc6f99a2cd7870"]]},{"id":"de7e01c12f7864f0","type":"ui_text","z":"09deee63c1b960f7","group":"08ac9b242ae51e8c","order":14,"width":0,"height":0,"name":"","label":"Triger output","format":"{{msg.payload}}","layout":"row-spread","className":"","x":870,"y":1540,"wires":[]},{"id":"a7bc6f99a2cd7870","type":"change","z":"09deee63c1b960f7","name":"error message","rules":[{"t":"set","p":"payload","pt":"msg","to":"<font color=\"red\">set trigger delay first</font>","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":500,"y":1540,"wires":[["de7e01c12f7864f0"]]},{"id":"08ac9b242ae51e8c","type":"ui_group","name":"Default","tab":"2acb95821445c8af","order":1,"disp":true,"width":"6","collapse":false,"className":""},{"id":"2acb95821445c8af","type":"ui_tab","name":"Home","icon":"dashboard","disabled":false,"hidden":false}]
I think your change mode is wrong.
The dashboard sets msg.payload, you need to move that into msg.delay to pass to the trigger node.
