M.samani

Hi

I got a connection between 2 Schneider PM1200 Power Meters and S7-1200 PLC through Modbus RTU.I read the current value of phase 1in the address registers 3929 and 2925of PM1200s.But I received variable and irrelevant values.What's wrong?

I attached my project pictures and PM1200 manual.

Best Regards.

Hi huggy_d1

According to S7 1200 manual and PM1200 manual must be add 4 or40 before3900.

PM1200 manual(page 64):

Address configuration: All addresses are in decimal. Some SCADA software supports

Modbus register address instead of absolute register address. In this case add 40000 to the

above address and use it. For example, VA parameter absolute address is 3901. Modbus

address can be 43901 (40000+3901). [page 64]

S7 1200 manual(I attach page 643 of S7 1200 manual):

Thanks.

M.samani

Hi huggy_d1

According to S7 1200 manual and PM1200 manual must be add 4 or40 before3900.

PM1200 manual(page 64):

Address configuration: All addresses are in decimal. Some SCADA software supports

Modbus register address instead of absolute register address. In this case add 40000 to the

above address and use it. For example, VA parameter absolute address is 3901. Modbus

address can be 43901 (40000+3901). [page 64]

S7 1200 manual(I attach page 643 of S7 1200 manual):

Thanks.

New question published by khatn is split to a separate thread with the subject S7-1200 1214C conect to PM1200.

Best regards
Min_Moderator

Dear Mr.Samani,

I tried to connect one PM1200 to PLC s7-1200 but I did not succeed,can you help me?

Thanks alot

bro.

Use real datatype and use rotate on right block in Dword for 16 bit...because modbus rtu send first lsb then msb...

so we rotate every  register whenever read actual data...