how to design telemetering for electric motor

R

Thread Starter

rahmad

i have a problem about how to know electric motor turn on or turn off with approximately distance 10 km from power plant. Start how to design and technology what be used. May be you can help my problem.
Thanks for your answer
 
I would install a very inexpensive PLC at the remote motor site and have it read an auxiliary contact from the motor starter. The auxiliary contact would be set up as an input to a discrete input channel on the PLC.

Set up the PLC as a Modbus slave (if your plant control system can speak Modbus), and poll the status of the discrete input from the plant (master) via radio.

If the motor is run by a VFD, then some VFD's can be polled as a Modbus slave directly, so you could eliminate the PLC in that case.

If your plant uses another form of communication (eg Allen Bradley DF1 or EtherNet/IP), then that would work, too. You'd probably want to use an Allen Bradley PLC in that case. Eg a MicroLogix 1100.

Hope this helps!
 
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