Sequencing Logic B-1
AC30 series Variable Speed Inverter
Appendix B: Sequencing Logic
Drive State Machine
DS402
The sequencing of the inverter is based on the DS402 / DriveCOM / IEC 61800-7 standard as used by most industrial fieldbuses . This allows it to
be easily controlled and monitored by a PLC using the standards’ Control Word and Status Word.
Sequencing State
The sequencing state of the unit is indicated by an enumerated value given by the 0678 Sequencing State parameter.
0 NOT READY TO SWITCH ON Not ready to switch on. The drive is initialising or being configured.
1 SWITCH ON DISABLED The Drive will not accept a switch on command
2 READY TO SWITCH ON
The Drive will accept a switch on command.
3 SWITCHED ON
The Drive will accept an Operation Enable (Run or Jog) command.
- Power stage of the Drive is ready to operate.
- Voltage has not yet been applied to the motor terminals.
4 OPERATIONAL ENABLED
Normal operational state of the drive. This state includes Running, Jogging,
Stopping (Disabling Operation) and Shutting Down (Switching Off).
- Voltage applied to the motor terminals.
5 QUICKSTOP ACTIVE Emergency stop (Fast stop) is active
6 FAULT REACTION ACTIVE The Drive is processing a trip event
7 FAULTED The Drive is tripped awaiting trip reset
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