Feedback Of The Esr Status - Siemens SINUMERIK 840D sl Function Manual

Note
The trigger signal must be active in the part program/synchronized action for at least 2 IPO
cycles to ensure that the PROFIdrive telegram is transferred to the drive.
Mapping in the drive unit
System variable $AN_ESR_TRIGGER is mapped to drive parameter p0890.0.
Interconnecting drive parameter p0890.0 with the corresponding information in telegram 390
or 391 to the Control Unit is realized automatically when the drive unit commissions the ESR
reactions.
References
For a detailed description of drive parameters, refer to:
SINAMICS S120/S150 List Manual
6.3.7

Feedback of the ESR status

System variable
The drive signals back the actual ESR status to the control using the message word
(MELDW) of the cyclic PROFIdrive telegram. The status can be read in the control using
system variable $AA_ESR_STAT:
• $AA_ESR_STAT .Bit2 (ESR is triggered)
• $AA_ESR_STAT .Bit3 (DC link undervoltage)
• $AA_ESR_STAT .Bit4 (Generator minimum speed)
The system variable can be evaluated in the part program/synchronized action, for example
in order to trigger the drive-integrated ESR (see Chapter "Triggering ESR via system variable
[Page 388]") or to acknowledge the ESR reactions triggered in the drive "Acknowledge ESR
reactions [Page 390]").
NC/PLC interface
The following signals are used to display the ESR status in the NC/PLC interface.
• DB31, ... DBX95.0 (VDC link voltage < alarm threshold)
• DB31, ... DBX95.3 (generator operation minimum speed fallen below)
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
R3: Extended stop and retract
6.3 ESR executed autonomously in the drive
389