5V/24V Encoder Or 15V D/A Converter Undervoltage - Siemens Sinumerik 840D sl Diagnostic Manual

Overview of Alarms
NCK alarms
2120 NCK fan alarm type %1
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.
In the case of a fan defect, Solutionline modules can be forced to power off in order to prevent them
from mechanical destruction (see Manual: chapter Dual fan/battery module). This applies, if the fan
alarm is of type one.
Reaction: Alarm display.
Remedy: Please inform the authorized personnel/service department. The unit with the fan and NCK battery
must be replaced.
Program Con- Clear alarm with the Delete key or NC START.
tinuation:
2130

5V/24V encoder or 15V D/A converter undervoltage

Definitions: A failure has occurred in the power supply 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 Con- Switch control OFF - ON.
tinuation:
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 Con- Alarm display showing cause of alarm disappears. No further operator action necessary.
tinuation:
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 com-
munication 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 can-
cel channel assignment.
Program Con- Switch control OFF - ON.
tinuation:
2-18
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG, 2009. All Rights Reserved
03/2009