Alarms - Siemens SINUMERIK 840D sl Function Manual

F1: Travel to fixed stop
6.2 Detailed description
6.2.8

Alarms

Alarm 20091 "Fixed stop not reached"
If the fixed stop position is not reached during travel to fixed stop, alarm 20091 "Fixed stop not
reached" is displayed and a block change executed.
Alarm 20092 "Travel to fixed stop is still active"
If there is a travel request or renewed function selection for the axis after the fixed stop has
been reached, alarm 20092 "Travel to fixed stop is still active" is displayed.
Alarm 20093 "Standstill monitoring at fixed stop has triggered"
If an axis has reached the fixed stop and is then moved out of this position by more than the
value specified in the setting data
SD43520 FIXED_STOP_WINDOW (fixed stop monitoring window)
alarm 20093 "Standstill monitoring at fixed stop has triggered" is displayed, travel to fixed stop
for this axis is deselected and the following system variable set:
$AA_FXS[x] = 2
Alarm 20094 "Function has been aborted"
The travel to fixed stop is aborted if the clamping torque can no longer be applied due to the
cancellation of the pulse enable, or the requested acknowledgement signal at the NC/PLC
interface has been reset:
● Acknowledgement signal required: MD37060 $MA_FIXED _STOP_ACKN_MASK, bit 0 = 1
● Acknowledgement signal: DB31, ... DBX3.1 == 0 (enable travel to fixed stop)
Enabling the fixed stop alarms
The following machine data can be use to set whether the fixed stop alarms
● Alarm 20091 "Fixed stop not reached",
● Alarm 20094 "Fixed stop aborted"
are displayed:
MD37050 $MA_FIXED_STOP_ALARM_MASK (enable of the fixed stop alarms)
Settable functional behavior for fixed stop alarms
The following machine data can be used to set that the function is not aborted when function-
specific alarms occur:
● Alarm 20090 Travel to fixed stop not possible
● Alarm 20091 Fixed stop not reached
● Alarm 20092 Travel to fixed stop is still active
● Alarm 20093 Standstill monitoring at fixed stop has triggered
● Alarm 20094 Travel to fixed stop aborted
MD37052 $MA_FIXED_STOP_ALARM_REACTION (reaction to fixed stop alarms)
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions