Siemens SINUMERIK 840Di Function Manual page 306

Detailed Description
2.9 Identifying defective drive modules
Remove drive module at NC end
A drive module (SIMODRIVE 611 digital) specified in an alarm text must be removed from
the bus:
1. Remove the module from the drive bus network.
2. Set entries of the drive module in machine datum:
3. Perform an NC RESET.
The axes which were controlled by the removed drive modules are now replaced by
simulated axes. The 611D bus with its drive modules is now in a state in which it could
normally move axes, but axis traversal has been disabled internally.
Alarm 300020 "Drive %1 removed for diagnostics" is displayed to indicate this status to the
operator.
Restoring the initial configuration
After completing the diagnostics, the initial configuration on the drive bus must be restored:
1. Replace or re-install the removed drive module.
2. Change entries of the drive module in machine datum:
3. Perform an NC RESET.
Example
The 2axis module with drive numbers "1" and "2" must be removed from a drive grouping.
Note
Before activating the function, the module in question must be removed from the drive bus
configuration
(SIMODRIVE 611 digital). To do this, connect the drive bus so as to exclude the module.
If Safety Integrated has been activated for the modules concerned, you must disable it
manually (safety, logged, EMERGENCY STOP scheme).
2-32
MD13030 $MN_DRIVE_MODULE_TYPE
to zero (zero-axis module).
MD13030 $MN_DRIVE_MODULE_TYPE
back to the original values.
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Diagnostic Tools (D1)