NORD Drivesystems BU0080 - Manual (Page 37)

6 Data transmission
37
6.4.9 The status machine
The frequency inverter passes through a status machine. The changes between various states are triggered
by the respective control commands in the process data control word. The actual status is returned in the
process data status word.
After switching on, the inverter is in switch-on disabled status. This status can only be ended by transmitting
the “Shut down (Off 1)” command.
The answer to a Master telegram normally does not yet contain a reaction to the control command. The
controller has to check the answers from the slaves as to whether the control command has been carried out.
The following Bits indicate the status of the frequency inverter:
Status Bit 6
Switch-on
disable
Bit 5
Emergency
stop
Bit 4
Disable
voltage
Bit 3
Fault
Bit 2
Operation
enabled
Bit 1
Standby
Bit 0
Ready for
switch-on
Not ready to start 0 X X 0 0 0 0
Starting disabled 1 X X 0 0 0 0
Ready to start 0 1 1 0 0 0 1
Activated 0 1 1 0 0 1 1
Operation enabled 0 1 1 0 1 1 1
Fault 0 X X 1 0 0 0
Error active 0 X X 1 1 1 1
Emergency stop active 0 0 1 0 1 1 1