Appendix B: Modbus Protocol - Application Layer Description; Memory Model - Zener MSC-3 Instruction Manual

Appendix B: MODBUS Protocol - Application Layer Description

Memory Model

Discrete Inputs (read only)
Address Discrete Input ID
0 Remote
1 Enable
2 Switching
3 Power Up
4 BusCharged
5 Ramping
6 Coasting
7 AutoRestartFail
8 OutputShortTrip
9 OverVoltageTrip
10 OverCurrentTrip
11 DCLowTrip
12 PowerFailTrip
13 OverTempTrip
14 I2tTrip
15 Tripped
16 Voltage Limit
17 Current Limit
18 At-Zero-Speed
19 At-Speed
20 RunStatus
Coils (read/write)
Address Coil ID
0 FWD
1 REV
1,2
2 Reset
3 ESO
4 Coast2Stop
G166 RUN SIGNALS must be set to FROM NETWORK for this operation.
1
D03 REVERSE must be ENABLED for this operation
2
Discrete Input Set
Remote mode operation
MSC-3 is enabled
MSC-3 output in ON
MSC-3 is fully powered
DC bus is charged
Ramp to stop mode
Coast to stop mode
Failed to auto restart after a trip
Hardware detected output short circuit
Hardware detected over voltage trip
Over current trip detected
Low DC bus voltage trip detected
input power failure trip detected
Power hardware over temperature trip detected
Over current trip detected
one or more trips detected
MSC-3 operating at or near max DC bus
voltage
MSC-3 operating at or near max output current
Motor is at zero speed
Motor is at commanded speed
MSC-3 is running the motor and not tripped
Start the motor turning or continue in the
1
forward direction.
Start the motor turning or continue in the
reverse direction.
Issue a trip reset
Start or run the motor under ESO conditions.
When stopping the motor and load stops by its
own.
IM00120 IM00120
Coil Set
MSC-3 Instruction Manual
Discrete Input Cleared
Local mode operation
MSC-3 is disabled
MSC-3 output is OFF
MSC-3 is in the
process of powering
up
DC bus is charging
Coil Cleared
Ramp or Coast to zero
speed.
Ramp or Coast to zero
speed.
Run under pre-
existing conditions
When stopping the
motor is ramped down
to zero speed
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