# Test connection with Moxa Nport 5110 not working

**URL:** <https://discourse.nodered.org/t/test-connection-with-moxa-nport-5110-not-working/72692>\
**Category:** General\
**Created:** [25 December 2022 19:54 UTC](https://discourse.nodered.org/t/test-connection-with-moxa-nport-5110-not-working/72692 "2022-12-25T19:54:31Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![GuE](https://avatars.discourse-cdn.com/v4/letter/g/c57346/32.png) [@GuE](https://discourse.nodered.org/u/GuE)\
**Post date:** [25 December 2022 19:54 UTC](https://discourse.nodered.org/t/test-connection-with-moxa-nport-5110-not-working/72692/1 "2022-12-25T19:54:31Z")

</div>

Hello.  
... trying to find the problem on my test set up.  
Using RPI4 with node-red to connect the my Moxa NP5110 with TCP and to get some test data I connected a PC with Modbus Sim to my Moxa.

 ![test-set-up](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/d/c/dc7aca712ad65e5281f6380e50252164a06f6e7c.png)

Followed the moxa driver installation without error and added server.

```auto
#=========================================================#
# This configuration file is created by Moxa NPort #
# Administrator Program automatically, please do not #
# modify this file by yourself. #
#=========================================================#
ttymajor=33
calloutmajor=38
#[Minor] [ServerIP]	[data]	[cmd]	[FIFO]	[SSL]	[ttyName] [coutName] [interface][mode][BackIP]
0	192.168.100.18	4001	966	1	0	ttyr00	cur00	0	0	
1	192.168.100.18	4002	967	1	0	ttyr01	cur01	0	0	

```

**Created the flow in node-red and trying to connect and read the data.**

```auto
[{"id":"927518f8421e7727","type":"tab","label":"Flow-MOXA-Test","disabled":false,"info":"","env":[]},{"id":"c1ba493fd008da38","type":"modbus-read","z":"927518f8421e7727","name":"","topic":"","showStatusActivities":false,"logIOActivities":false,"showErrors":true,"showWarnings":true,"unitid":"1","dataType":"HoldingRegister","adr":"2","quantity":"2","rate":"1","rateUnit":"s","delayOnStart":false,"startDelayTime":"","server":"48425233340cc44d","useIOFile":false,"ioFile":"","useIOForPayload":false,"emptyMsgOnFail":false,"x":270,"y":200,"wires":[["cb4b692fa0ce887f"],["2a3449dadc4de02c"]]},{"id":"cb4b692fa0ce887f","type":"modbus-response","z":"927518f8421e7727","name":"","registerShowMax":20,"x":550,"y":160,"wires":[]},{"id":"2a3449dadc4de02c","type":"debug","z":"927518f8421e7727","name":"debug 1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":520,"y":220,"wires":[]},{"id":"48425233340cc44d","type":"modbus-client","name":"MOXA","clienttype":"tcp","bufferCommands":true,"stateLogEnabled":false,"queueLogEnabled":false,"failureLogEnabled":true,"tcpHost":"192.168.100.18","tcpPort":"4001","tcpType":"DEFAULT","serialPort":"/dev/ttyUSB","serialType":"RTU-BUFFERD","serialBaudrate":"9600","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","serialAsciiResponseStartDelimiter":"0x3A","unit_id":"1","commandDelay":"1","clientTimeout":"1000","reconnectOnTimeout":true,"reconnectTimeout":"2000","parallelUnitIdsAllowed":false,"showWarnings":true,"showLogs":true}]

```

**I am not able to connect ? See Error log**  
**Any idea what i'm doing wrong?**  
**Thx for support.**

```auto
25 Dec 19:45:39 - [warn] [modbus-client:MOXA] Client -> fsm broken state after init Get More About It By Logging TCP@192.168.100.18:4001 default Unit-Id: 1
25 Dec 19:45:39 - [warn] [modbus-client:MOXA] Client -> fsm reconnect state after broken Get More About It By Logging TCP@192.168.100.18:4001 default Unit-Id: 1
  modbus-serial TCP port: signal close: true +3ms
25 Dec 19:45:41 - [warn] [modbus-client:MOXA] Client -> fsm init state after reconnecting TCP@192.168.100.18:4001 default Unit-Id: 1
25 Dec 19:45:41 - [warn] [modbus-client:MOXA] Client -> fsm init in 2000 ms TCP@192.168.100.18:4001 default Unit-Id: 1
  contribModbus:core:client Client -> connection close sent TCP@192.168.100.18:4001 default Unit-Id: 1 +4s
  contribModbus:core:client Client -> TCP port TCP@192.168.100.18:4001 default Unit-Id: 1 +0ms
  modbus-serial TCP port: signal error: Error: connect ECONNREFUSED 192.168.100.18:4001 +4s
  modbus-serial {
  modbus-serial action: 'port open error',
  modbus-serial error: Error: connect ECONNREFUSED 192.168.100.18:4001
  modbus-serial at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1278:16) {
  modbus-serial errno: -111,
  modbus-serial code: 'ECONNREFUSED',
  modbus-serial syscall: 'connect',
  modbus-serial address: '192.168.100.18',
  modbus-serial port: 4001
  modbus-serial }
  modbus-serial } +4s
  modbus-serial modbusTcpErrorHandling:connect ECONNREFUSED 192.168.100.18:4001 +4s
25 Dec 19:45:44 - [warn] [modbus-client:MOXA] Client -> fsm broken state after init Get More About It By Logging TCP@192.168.100.18:4001 default Unit-Id: 1
25 Dec 19:45:44 - [warn] [modbus-client:MOXA] Client -> fsm reconnect state after broken Get More About It By Logging TCP@192.168.100.18:4001 default Unit-Id: 1
  modbus-serial TCP port: signal close: true +3ms
25 Dec 19:45:46 - [warn] [modbus-client:MOXA] Client -> fsm init state after reconnecting TCP@192.168.100.18:4001 default Unit-Id: 1
25 Dec 19:45:46 - [warn] [modbus-client:MOXA] Client -> fsm init in 2000 ms TCP@192.168.100.18:4001 default Unit-Id: 1
  contribModbus:core:client Client -> connection close sent TCP@192.168.100.18:4001 default Unit-Id: 1 +4s
  contribModbus:core:client Client -> TCP port TCP@192.168.100.18:4001 default Unit-Id: 1 +0ms
  modbus-serial TCP port: signal error: Error: connect ECONNREFUSED 192.168.100.18:4001 +4s
  modbus-serial {
  modbus-serial action: 'port open error',
  modbus-serial error: Error: connect ECONNREFUSED 192.168.100.18:4001
  modbus-serial at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1278:16) {
  modbus-serial errno: -111,
  modbus-serial code: 'ECONNREFUSED',
  modbus-serial syscall: 'connect',
  modbus-serial address: '192.168.100.18',
  modbus-serial port: 4001
  modbus-serial }
  modbus-serial } +4s
  modbus-serial modbusTcpErrorHandling:connect ECONNREFUSED 192.168.100.18:4001 +4s
25 Dec 19:45:48 - [warn] [modbus-client:MOXA] Client -> fsm broken state after init Get More About It By Logging TCP@192.168.100.18:4001 default Unit-Id: 1

```

---

<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:** [23 February 2023 19:54 UTC](https://discourse.nodered.org/t/test-connection-with-moxa-nport-5110-not-working/72692/2 "2023-02-23T19:54:44Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.