Siemens SINUMERIK 840Di Diagnostic Manual page 487

11/2006
28004 NCU link: NCU %1 of the link network is not on the bus
Parameters: %1 = NCU number
Definitions: Error message of the NCU link module. When the NCU link was powered up, the local NCU (indicated
by the alarm) detected that the NCU with the number in the alarm parameter was not on the bus
although it should be connected according to the MD settings.
This fault in the link can have various causes:
- Defective hardware.
- The machine data which configure the NCU link are not identical on all NCUs.
- An identical interpolator cycle time has not been selected on all NCUs.
Reaction: NC not ready.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Check the machine data configuration and link hardware.
Program Switch control OFF - ON.
Continuation:
28005 NCU link: NCU %1 of the link network not running synchronously
Parameters: %1 = NCU number
Definitions: Error message of the NCU link module. When the NCU link was powered up, the local NCU (indicated
by the alarm) detected that the NCU with the number in the alarm parameter was not running
synchronously.
This fault in the link can have various causes:
- The machine data which configure the NCU link are not identical on all NCUs.
- An identical interpolator cycle time has not been selected on all NCUs.
Reaction: NC not ready.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Check machine data configuration.
Program Switch control OFF - ON.
Continuation:
28007 NCU link: conflict in configuration data of NCU %1
Parameters: %1 = NCU number
Definitions: Error message of the NCU link module. When the NCU link was powered up, the local NCU (indicated
by the alarm) detected a conflict between its configuration and the configuration of the NCU in the
alarm parameter.
Example: Machine data LINK_NUM_OF_MODULES defines the number of nodes on the NCU link
network. The alarm occurs if this MD has a different setting on different NCUs.
Reaction: NC not ready.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Check machine data configuration.
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
2-487