A2: Various NC/PLC interface signals and functions
1.2 NC/PLC interface signals
Basic Functions
52 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
DB31, ... DBX21.5 (Motor selection done)
The PLC user program sends this signal to the drive to indicate successful motor selection. For example, in the
case of star/delta switchover on the SIMODRIVE 611D or 611U, a message or signal must be provided when the
motor contactor has switched. The pulses are then enabled by the drive.
DB31, ... DBX21.6 (integrator disable, n-controller)
The PLC user program inhibits the integrator of the speed controller for the drive. The speed controller is thus
switched from PI to P controller.
Note
If the speed controller integrator disable is activated, compensations might take place in certain applications (e.g.
if the integrator was already holding a load while stationary).
Feedback via the interface signal:
DB31, ... DBX93.6 = 1 (integrator n-controller disabled)
DB31, ... DBX21.7 (pulse enable)
The pulse enable for the drive module is only requested if all enable signals (hardware and software) are
pending:
• Trigger equipment enable
• Controller and pulse enable
• Pulse enable (safe operating stop)
• Stored hardware input
• Setpoint enable
• "Ready to run state"
- No drive alarm (DClink1 error)
- DC link connected
- Ramp-up completed
See also:
DB31, ... DBX93.7 (pulses enabled)
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