MODBUS library error 6011

[SeanG]

Hi There,

I am trying to talk to a MODBUS device via ethernet using a GE Multinet - ethernet to serial converter. I can establish the TCP connection but when I try to "read holding registers" using "MB ethernet Master query read holding registers (poly).vi" I get an error code of 6011, exception code 11.

I can read and write to and from the MODBUS device using other software so I know the hardware is configured and connected correctly.

Does anyone have any suggestions as to what may be going wrong here?

Regards,
Sean.

[MarcoMauri]

I'd suggest to use wireshark to monitor what's being sent and received to/from the MODBUS device.

I think the problem is due to the fact the you are using the Ethernet vi but the interface on the device is serial.

In the past I had to slightly modify the vi in order to use it with a converter.

Regards,

Marco

[SeanG]

Thanks Marco, I appreciate your advice.

Any chance of seeing the code changes you made?

Regards,
Sean.

[MarcoMauri]

Sorry Sean but at the moment I don't have access to that code. 😕

Marco

[sponi78]

Did you solve this problem?