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In this particular example following documents has been used:
Modbus RTU FBP FielBusPlug MRP21.
Softstarters PST installation and commissioning manual SfC132003M0201, Jan 2005
Softstarter software version: Ver 04.g.
This document describes application example between Modbus RTU
master PLC CPU, PC, etc. FBP technical description 2CDC194001D0201.
1SFC132043M0201 10
.values will skipped. the baud rate the slave is
19200.
The communication parameters are: Start bit, Data bits, the Parity will adapted the
master. Set the communication parameters.).02
For other versions software RED marked figures this example will change
Softstarter settings
1. The valid range per type shown the softstarter catalogue the softstarter front
label (marking plate).
16 Bit Mask for
Events Relay
outputs
Bit Overload
Bit Fault
Bit High I
Bit SCR OL
Bit Locked Rotor
Bit Underload
Bit Phase Imb
Bit PTC
Bit Phase Rev
Bit Warn OL
Bit Warn SCR OL
Bit Warn I=High
Bit Warn I=Low
Bit Shunt Fault
Bit Spare
Bit Spare
Example for set up.
Change the default address 248 the softstarter with the keypad (Fieldb Addr)
and enable the fieldbus communication Fieldb Ctrl=Yes ). and the ABB softstarter PST equipped with
a modbus fiedbus plug.00. Set the softstarter address and field bus communication. Therefore the master and the slave will have the communication parameters:
1 start bit, stop bit, data bit, even parity, 19200 baud
Data exchange with the Modbus RTU master
Step1
Without receiving the configuration data the softstarter not responding the request
telegrams the Master (LED the FBP blinking).
Softstarter PST Modbus RTU communication.
Send configuration data the softstarter (Number I/O number parameters, etc. Please always use the actual softstarter and FBP manuals. The baud rate mapped the slave address, e.
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