IEC 870-103 driver & command processing

IEC 870-103 driver & command processing

Hi,

I'm trying to set up communications with Siemens relays via 870-103 but am having come issues with commands. If I use 'write set value' I can issue both off (1) and on (2) commands which work correctly

Info per the help file:

"To send General command to the PLC (ASDU <20> in control direction), you have to configure a variable of the driver object type COMMAND with the corresponding Function Type and Information Number. A set value sent to this variable (DCO: 1-off, 2-on) will be sent to the PLC as a General Command. If a command could not be sent successfully, the PN Bit of the variable will be set to 1."

I'm trying to get command processing working, however it only seems to allow you to send a 0 or 1 so only my 'true' button works. Help file does not state any 'qualifier of command' settings that may be required in the CP module.

Ideally I also want to get incoming command via process gateway (from DNP3) to work downstream to the relay via Zenon, but assume if it works in command processing then the 'auto/remote' type will also map through correctly.

Thanks,

Dave

This is a migrated post! Originally posted on 06.02.2020 by user HMIdeveloper123. Please be aware that information can be outdated.