Connecting Panel PP874 to AC500 PM554 through modbus RTU
I need to connect the PP874 to an AC500 PM 554 PLC through the Modbus RTU
I will use the Com1 Port for that
how to read/with variables from/to Panels ?
what is the necessary configuration I need to do?
is there is end resistors required ?
is there is an example for such application ?
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There was a similar question some time ago, let me see... here:
It's about Modbus TCP, but RTU configuration is analogous.
About terminators - this is hard to answere, as the manual states it depends on part number (see info below):
I think there is no such a configuration example here on AKS, so in case of any other questions just ask the community.
Hope it helps,
I can only help you with AC500 part but here we go:
Usually the Panel is Client(master) in a modbus connection.
You need to know that PM554 only do RS485 on the COM1 and the longest your connection can be is 50m.
Without extra equipment for galvanic isolation of the COM1.
You might need to add some resistors. See PDF.
That is what I can help with.
See the online help for the driver to setup the communication in the panel
See the technical describtion 3BSE078537
There is also information inthe HW and installation manual for the panel 3BSE069458, section 7
Cable and Bus Termination RS485