Siemens SINUMERIK 840Di Diagnostic Manual page 79

11/2006
6442 Channel %1 function not executable. No tool assigned to desired
magazine/magazine location %2.
Parameters: %1 = Channel ID
%2 = Magazine/magazine location no.
Definitions: PLC logic is presumably incorrect. Tool change with reject tool is configured. Preparatory command
is pending. Selected tool is (e.g. from PLC) unloaded from its location. PLC acknowledges preparatory
command with 'Repeat tool selection' (e.g. status =7). NCK cannot find the tool at the magazine
location specified in the PLC command.
Or: Illegal operator intervention in an active tool selection (unloading of the tool to be selected) has
occurred. Therefore the PLC acknowledgement fails.
Reaction: Interface signals are set.
Alarm display.
Remedy: PLC programmer must note the following:
- Ensure that the tool is not removed from the specified magazine location (e.g. incorrect PLC
program).
- Do not remove the tool from the programmed tool change before the final acknowledgement of the
command (= unload).
!! It is however permissible to change the location of the tool to be loaded. The NCK can deal with this
situation.
This alarm supplements Alarm 6405, if it contains the identifier 8. Therefore, the diagnostics should
be easier.
Program Clear alarm with the Delete key or NC START.
Continuation:
6450 Channel %1 block %2 tool change not possible. Invalid magazine
location no. %3 in buffer magazine
Parameters: %1 = Channel ID
%2 = Block number, label
%3 = Magazine location number
Definitions: The desired tool change is not possible. The specified magazine location is either toolholder/spindle
or empty.
Only the numbers of the buffer that are not toolholder/spindle may be programmed with the NC
command TCI, i.e. the location number of a gripper is allowed.
Reaction: Correction block is reorganized.
Interface signals are set.
Alarm display.
Remedy: - Check whether the magazine data ($TC_MPP1) have been defined correctly.
- Check whether the alarm-causing program command _ e.g. TCI _ has been programmed correctly.
Program Clear alarm with NC START or RESET key and continue the program.
Continuation:
6451 Channel %1 block %2 tool change not possible. No buffer magazine
defined.
Parameters: %1 = Channel ID
%2 = Block number, label
Definitions: The desired tool change is not possible. No buffer magazine defined.
Reaction: Correction block is reorganized.
Interface signals are set.
Alarm display.
Remedy: Check whether the magazine data have been defined correctly.
Program Clear alarm with NC START or RESET key and continue the program.
Continuation:
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
Overview of Alarms
NCK alarms
2-79