Siemens SINUMERIK 840D sl Series Diagnostics Manual page 942

Overview of Alarms
Program Con- Switch control OFF - ON.
tinuation:
400255
Sign of life monitoring NCK2
Definitions: NCK2 has not contacted the PLC during cyclic operation. Timer of FB1 parameter NCCy-
clTimeout was executed without retrigger. (FM-NC only).
Reactions: - Alarm display.
Remedy: NCK restart
Program Con- Internal
tinuation:
400256
NCK2 has not run up
Definitions: NCK2 has not run up. NCK has not contacted the PLC. Timer of FB1 parameter
NCRunupTimeout has expired. (FM-NC only).
Reactions: - Alarm display.
Remedy: General NCK reset and restart.
Program Con- Internal
tinuation:
400257
Error in internal communication with NCK2
Definitions: An error has occured during data transmission between the PLC and the NCK. (FM-NC
only)
Reactions: - Alarm display.
Remedy: NCK restart
Program Con- Internal
tinuation:
400260
Failure of machine control panel 1
Definitions: Machine control panel (MCP) at machine control panel interface 1 has failed. Timer of
FB1 parameter MCP1Timeout has expired.
Reactions: - Alarm display.
Remedy: Check the connection with the MCP. Do not use timer T0 through T9 in the user program.
Increase the value of timer parameter MCP1Timeout. Set MCP1Cycl to the default value.
Program Con- Internal
tinuation:
400261
Failure of machine control panel 2
Definitions: Machine control panel (MCP) at machine control panel interface 2 has failed. Timer of
FB1 parameter MCP2Timeout has expired.
Reactions: - Alarm display.
Remedy: Check the connection with the MCP. Do not use timer T0 through T9 in the user program.
Increase the value of timer parameter MCP2Timeout. Set MCP2Cycl to the default value.
Program Con- Internal
tinuation:
400262
Failure of handheld unit
Definitions: Handheld unit (HHU) at handheld unit interface has failed. Timer of FB1 parameter HHU-
Timeout has expired.
Reactions: - Alarm display.
Remedy: Check the connection with the HHU. Do not use timer T0 through T9 in the user program.
Increase the value of timer parameter HHU1Timeout. Set HHUCycl to the default value.
2-942
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005