aandjsam
Member
Hi all,
I've hit a bit of a brick wall and need some help. I'm currently trying to get a Siemens S7-1200 PLC to talk to an Eaton DE1 Drive I'm using the CB 1241 RS485 Communication module, Wired like so:
M: Pin 1 (0V)
TA: Linked to T/RA
T/RA: Pin 7
T/RB: Pin 8
TB: Linked to T/RB
RTS:N/C
All I need is simple start and stop control with a speed reference, reading a fault from the drive would be handy if possible, also. This should be simple, but I just can't figure it out, I've only ever dealt with ethernet and profinet.
I've successfully loaded the MB_COM_LOAD FB and called it in the 'OB1' using the first scan bit. this loads without errors, I just can't figure out the MB_MASTER FB, what parameters need entering in it etc...
Hope you guys can help!
The DE1 Modbus RTU Manual:
ftp://ftp.moeller.net/DOCUMENTATION/AWB_MANUALS/MN040018_EN.pdf
TIA,
Sam
I've hit a bit of a brick wall and need some help. I'm currently trying to get a Siemens S7-1200 PLC to talk to an Eaton DE1 Drive I'm using the CB 1241 RS485 Communication module, Wired like so:
M: Pin 1 (0V)
TA: Linked to T/RA
T/RA: Pin 7
T/RB: Pin 8
TB: Linked to T/RB
RTS:N/C
All I need is simple start and stop control with a speed reference, reading a fault from the drive would be handy if possible, also. This should be simple, but I just can't figure it out, I've only ever dealt with ethernet and profinet.
I've successfully loaded the MB_COM_LOAD FB and called it in the 'OB1' using the first scan bit. this loads without errors, I just can't figure out the MB_MASTER FB, what parameters need entering in it etc...
Hope you guys can help!
The DE1 Modbus RTU Manual:
ftp://ftp.moeller.net/DOCUMENTATION/AWB_MANUALS/MN040018_EN.pdf
TIA,
Sam