NCK alarms
11/2006
Overview of Alarms
2-379
©
Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
20144
Channel %1 block %2 motion synchronous action: system variable
access not possible
Parameters:
%1 = Channel number
%2 = Block number
Definitions:
When using system variables, it is assumed that a read/write operation can access the required data
successfully. In accesses to encoder actual values or digital I/Os, the result depends on the availability
of the corresponding hardware components. If an access within synchronized actions does not return
a valid value, alarm 20144 is output. Outside synchronized actions, such a read/write access causes
block execution to be interrupted until the result is available. Block execution is subsequently
continued.
Reaction:
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy:
Before reading/writing system variables, ensure that it is possible to access the required hardware
components.
Program
Continuation:
Clear alarm with the RESET key. Restart part program
20145
Channel %1 block %2 motion synchronous action: arithmetic error
Parameters:
%1 = Channel number
%2 = Block number
Definitions:
In calculating an arithmetic expression for a motion synchronous action, an overflow has occurred
(e.g. division by zero).
Reaction:
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy:
Correct error in expression.
Program
Continuation:
Clear alarm with the RESET key. Restart part program
20146
Channel %1 block %2 motion synchronous action: nesting depth
exceeded
Parameters:
%1 = Channel number
%2 = Block number
Definitions:
For calculating arithmetic expressions in motion synchronous blocks, an operand stack with a fixed
set size is used. With very complex expressions, this stack can overflow.
Reaction:
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy:
Correct error in expression.
Program
Continuation:
Clear alarm with the RESET key. Restart part program
