"Response is NG! endCode: 1005, endCodeDescription:Command Format Error: Header Error."

[hipsi]

I'm done scratching my head, could you please point me in the right direction.

I am using a CP1L-EM with a built in ethernet port. Currently I'm just using the Read and Write demo flow

[Steve-Mcl]

• try enabling auto connect at the bottom of the config settings
• what is the IP address & mask of the device where nodered is running?
• Is the device running node red able to ping the PLC?
• Try entering the value 213 in the node number setting ( power cycle the PLC after adjusting this setting)
• Does the device running node-red have a firewall? Does it permit UDP communications on port 9600?

[hipsi]

IP address of the PC is 192.168.15.13 and mask is 255.255.255.0. I've only just realised however that I can't ping the PLC. I still need to understand what is what but I found that the default address of the built in ethernet is 192.168.250.1. That I can ping, regardless of what I set in the PLC settings (and upload to the PLC). So at this stage I don't know how to change it from 192.168.250.1 but if I use the default address range, I can get these flows to work.