Lenze 8400 - Safetorqueoff

4 Device control (DCTRL)
4.2 Device state machine and device states
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Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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4.2.4 SafeTorqueOff
Integrated safety systems with Inverter Drives 8400
Inverters of the 8400 series can be equipped with the integrated "Safe torque off (STO)" safety
system.
The integrated safety system can be used on machines for the protection of persons.
The drive function is still carried out by the inverter. The safety system provides safe inputs. If the
safety system is activated, it executes control functions according to EN 60204-1 directly in the
inverter in case of errors.
Safety state
If the inverter is switched off by the safety system, the device changes to the "SafeTorqueOff"
status.
If the safety system deactivates the "Safe torque off (STO)" request, the device changes to the
"ReadyToSwitchOn
" status.
"DRV-RDY" LED LED "DRV-ERR" Display in C00137 Display in status word 1 (C00150)
Bit 11 Bit 10 Bit 9 Bit 8
OFF SafeTorqueOff 1 0 1 0
 Note!
Up to and including version 13.xx.xx the following applies:
This device status is only possible in connection with an integrated safety system and if
a power section supply is available!
From version 14.00.00 the following applies:
This device status is only possible in connection with an integrated safety system!
 Detailed information on the integrated safety system can be found in the hardware
manual!
The hardware manual contains important notes on the safety system which must be
observed!
The hardware manual has been stored in electronic form on the data carrier supplied
with the 8400 inverter.