Siemens SINUMERIK 840Di Diagnostic Manual page 23

11/2006
2110 NCK temperature alarm
Definitions: The temperature sensor has reached the response threshold of 60 degrees C +/- 2.5 degrees C.
Reaction: Alarm display.
Remedy: In order to reset the sensor, the temperature must be reduced by 7 degrees C.
Program Clear alarm with the Delete key or NC START.
Continuation:
2120 NCK fan alarm
Definitions: The fan consists of a 26 V DC motor with electronic commutator (rated speed: approx. 8700 rpm). The
commutator signal is used for speed monitoring, response speed: < 7500 rpm.
Reaction: Alarm display.
Remedy: Please inform the authorized personnel/service department. The unit with the fan and NCK battery
must be replaced.
Program Clear alarm with the Delete key or NC START.
Continuation:
2130 5V/24V encoder or 15V D/A converter undervoltage
Definitions: A failure has occurred in the power supply (FM357-2) to the encoder (5V/24V) or D/A converter (+/-
15V).
Reaction: NC not ready.
The NC switches to follow-up mode.
Mode group not ready, also effective for single axes
NC Start disable in this channel.
Axes of this channel must be re-referenced.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Please inform the authorized personnel/service department. Check the encoder and cable for short-
circuits (the fault should not occur when you remove the cable). Check the power feeder line.
Program Switch control OFF - ON.
Continuation:
2140 The actual service switch position forces the SRAM to be cleared at the
next Power On (general reset active)
Definitions: The initialization switch is currently set to overall reset. This means that the module's SRAM is deleted
with the next module reset. The NC data memory is cleared during this operation.
Reaction: NC not ready.
Interface signals are set.
Alarm display.
Remedy: Reset initialization switch to zero.
Program Alarm display showing cause of alarm disappears. No further operator action necessary.
Continuation:
2190 Hardware plug-in module for communication with the digitizer missing
Definitions: MD $MN_ASSIGN_DIGITIZE_TO_CHAN was used to activate the digitizing function by assigning it
to a channel. The function requires a hardware module (RS422 board plugged into the NCU) for
communication with the digitizing unit. This module was not found when booting.
Reaction: Interface signals are set.
Alarm display.
Remedy: Please inform the authorized personnel/service department. Plug in communications module or
cancel channel assignment.
Program Switch control OFF - ON.
Continuation:
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
Overview of Alarms
NCK alarms
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