Modbus Read Timeout

Ignition
1

Modbus_error_p1
Modbus_error_p1925×654 50.5 KB

Modbus_error_p2
Modbus_error_p21453×791 63.7 KB

Modbus_error_p3
Modbus_error_p31513×870 76.2 KB

Hello,

Having a Modbus read error issue. Using a flow meter connected to a CommField RS485 to Modbus TCP converter. DVS-485-2.

I may have the incorrect addresses, but would that prevent a response?

Inbound and Outbound port 502 open.

Any help would be appreciated.

Thanks!

Jeff

2

Often, yes.

Try unit ID 1 instead of 0.

I'd also recommend you don't use the address mapping at all; just create OPC tags using the address syntax outlined in the manual.

3

Your screenshot clearly identifies this as a core certification test. Getting help for such on the forum is forbidden.

1 Like
4

Already turned my test. This is for an unrelated problem. But I appreciate the concern! I'll change the name of the Gateway : )

Jeff

1 Like
5

I'll be remoting in on system that my questions are based on soon. I'll try your suggestions. Thanks!