Siemens SINUMERIK 840D sl Function Manual page 96

A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
MD36310 $MA_ENC_ZERO_MONITORING
Value Meaning
= 0 Monitoring of HW faults:
Zero-mark monitoring:
= 100 No zero-mark monitoring as well as hiding of all encoder monitoring functions (i.e. in addition to alarm
25020 (25021)), alarms 25000 (25001) and 25010 (25011) are suppressed.
> 0 but < 100 Monitoring of HW faults:
Zero-mark monitoring:
> 100 Monitoring of HW faults:
Zero-mark monitoring:
For details on the alarms, see:
References:
Diagnostics Manual
Note
For hardware faults, the referencing status of the machine axis is reset:
DB31, ... DBX60.4/5 (referenced/synchronized 1/2) = 0
96
ON
If a hardware fault is detected in the active measuring system,
POWER ON alarm 25000 is displayed:
"Axis <Axis name> Hardware fault active encoder"
The affected axis is stopped via the configured braking ramp in
follow-up mode:
MD36610 $MA_AX_EMERGENCY_STOP_TIME (maximum time
for braking ramp when a fault occurs)
If a hardware fault is detected in the passive measuring system,
alarm 25001 is displayed:
"Axis <Axis name> Hardware fault passive encoder"
There is no further alarm response.
OFF
Alarms 25020 and 25021 (see below) are suppressed.
ON (see above)
ON
If zero-mark monitoring is tripped in the active measuring system,
alarm 25020 is displayed:
"Axis <Axis name> Zero-mark monitoring active encoder"
The affected axis is stopped via the configured braking ramp in
follow-up mode:
MD36610 $MA_AX_EMERGENCY_STOP_TIME (maximum time
for braking ramp when a fault occurs)
If zero-mark monitoring is tripped in the passive measuring system,
alarm 25021 is displayed:
"Axis <Axis name> Zero-mark monitoring passive encoder"
There is no further alarm response.
ON with attenuated error message:
The POWER ON alarm 25000 is replaced by the reset alarm 25010
and the reset alarm 25001 replaced by the cancel alarm 25011.
ON (see above)
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions