Matrix user forums

Hi there,

I'm testing the modbus master function in FC6.
The modbus commands seems to use standard Modicon addressing for all registers.
I have some PLC-controllers that I want to use the modbus master with.
They all use different addresses than the standard listing.
For example, I would like to use the ForceSingleCoil command for testing.
In the Koyo Click PLC, the Y001 output is on modbus address 8193.
In the Picsys PL250 PLC, the Q1/B1 is on modbus address 120.
Are there any settings to chose the location of the output?
Please let me know if anyone can help me.

Rinie

Hi there,

Can anybody help me with the Modbus function in Flowcode?
I'm testing "ForceSingleCoil" by sending this to a Slave with address 1, coli 1 to 32 depending on inputs, and 1 as a value for the coil.
I asume that this should switch the coil in the Slave, in this case a PLC to test with.
The PLC doesn't seen to respond.
I have connected a logic analiser and data goes out, the analiser doesn't give errors on the modbus protocol.

When I use "ForceSingleCoil", what goes out?
The PLC uses modbus address 8193 for output Y000.
I can't find any info on what is send, is "Coil 1" address 8193 or isn't this a standard modbus value?
Please let me know

RInie

Hello Rinie,

Modbus coils have Modbus addresses 1 - 9999 which equates to 0 - 9998 for the data address.

So for Modbus address 8193 you should send the data address 8192.

I can't find any info on what is send, is "Coil 1" address 8193 or isn't this a standard modbus value?

Coil 1 would be address 0.

https://www.google.co.uk/search?q=modbus+address+range