BENSHAW RediStart MX3 Series, User Manual

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Starter Control Register:
The control source must be serial for the starter to be started through Modbus. The Run/Stop bit must transition from 0 to 1 for a start to
occur. If the starter stops due to a fault, the action of the starter depends on the state of the Auto Start parameter (I/O27).
The fault reset bit must transition from 0 to 1 for a fault to be reset.
If any of the programmed digital inputs are programmed as Local/Remote inputs, then the local/remote bit has no effect.
When the relays are programmed as “OFF”, the relay bits may be written in order to control the relays. When the relays are programmed
for any function other than “OFF” (Fault, Run, UTS for example), then the relay bits may be read to determine the state of the relays.
Starter Status Register:
Watts, VA, vars, and kW hour Registers:
Meter registers present 32 bit meters in two consecutive 16 bit registers. The least significant 16 bits are in the first register followed by
the most significant 16 bits in the second register.
Reading the least significant register latches data into the most significant register so that the data remains synchronized between the
two.
Parameter Registers:
For those parameters that can be set either to “Off”, or some value within a range (many of the protection parameters, for example) there
are two Modbus registers. One is an “enable” register, and the other sets the value within the range.
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APPENDIX F - MODBUS REGISTER MAP
Bit 0 – Run/Stop
0: Stop
1: Start
Bit 1 – Fault Reset
0: No action
1: Fault Reset
Bit 2 –Emergency Overload Reset
0: No action
1: Emergency Overload Reset
Bit 3 –Local/Remote
0: Local
1: Remote
Bit 4 –Heat Disabled
0: Heater Enabled
1: Heater Disabled
Bit 5 –Ramp Select
0: Ramp 1
1: Ramp 2
Bit 10 – Relay 6
0: Energize(d)
1: De-energize(d)
Bit 11 – Relay 5 Same as above
Bit 12 – Relay 4 Same as above
Bit 13 – Relay 3 Same as above
Bit 14 – Relay 2 Same as above
Bit 15 – Relay 1 Same as above
Bit 0 – Ready
0: Initializing or
Faulted and Decelerating or
Faulted and Braking or
Faulted and Stopped or
Lockout
1: Otherwise
Bit 1 – Running
0: Not Running
1: Running
Bit 2 –UTS
0: Not UTS
1: UTS
Bit 3 –Alarm
0: No alarm conditions
1: 1 or more alarm conditions
Bit 4 –Fault
0: No Fault Condition
1: Fault Condition
Bit 5 –Lockout
0: Start or Fault Reset not locked out.
1: Start or Fault Reset locked out. Possible causes are:
Overload Lockout State