Siemens SINUMERIK 840D Series Diagnostics Manual page 20

1 Alarms
Reactions:
Remedy:
Program Continuation:
2001
Definitions:
Reactions:
Remedy:
Program Continuation:
2100
Definitions:
Reactions:
Remedy:
Program Continuation:
2101
Definitions:
Reactions:
Remedy:
Program Continuation:
1-20
- Local alarm reaction.
- NC not ready.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
Please inform the authorized personnel/service department. Check monitoring time frame
in NCK-MD 10100 PLC_CYCLIC_TIMEOUT (reference value: 100ms).
Establish the cause of the error in the PLC and eliminate it (analysis of the ISTACK. If
monitoring has responded with a loop in the user program rather than with a PLC Stop,
there is no ISTACK entry).
Switch control OFF - ON.
PLC has not started up
The PLC must give a sign of life within a period of time defined in MD 10120
PLC_RUNNINGUP_TIMEOUT (Default setting: 1 sec.).
- NC Start disable in this channel.
- NC not ready.
- Channel not ready.
- NC Stop on alarm.
- Local alarm reaction.
- Alarm display.
- Interface signals are set.
• Please inform the authorized personnel/service department. The monitoring time in
MD 10120 PLC_RUNNINGUP_TIMEOUT must be checked and adapted to the first
OB1 cycle.
• Establish the cause of error in the PLC (loop or stop in the user program) and eliminate.
Switch control OFF - ON.
NCK battery warning threshold reached
The undervoltage monitor of the NCK battery has reached the prewarning threshold. This
is at 2.7-2.9V (nominal voltage of the battery is 3.0-3.1V at 950mAh).
- Alarm display.
Please inform the authorized personnel/service department. The battery must be
replaced within the next 6 weeks. After this period, the voltage can drop below the alarm
limit of 2.4-2.6V if the RAMs to be buffered take up a lot of current.
Clear alarm with the Delete key or NC START.
NCK battery alarm
The undervoltage monitoring (2.4-2.6V) of the NCK battery has responded during cyclic
operation.
- Alarm display.
If the NCK battery is replaced without interrupting the power supply, no data will be lost.
This means that production can continue without taking any further steps. (A buffer capac-
itor on the NCK holds the supply voltage for at least 30 minutes and the battery can be
replaced within this time even when the control is switched off).
Clear alarm with the Delete key or NC START.
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
 Siemens AG, 2002. All rights reserved
11.02