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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 10223 - Command is already occupied
Alarm 10223 occurs when a modal G-code or command is programmed multiple times in the same NC block, creating a conflict. The SINUMERIK control cannot execute contradictory or duplicate commands simultaneously within a single block. This is typically caused by programming errors, macro expansions, or cycle definitions that generate conflicting commands.
10223
Siemens 10223 - Command is already occupied
Command is already occupied
This channel has received a negative acknowledgment from the inter-channel communication because this command is already active or has not yet been terminated, e.g.: INIT(x,"ncprog") but a program select request is already active for channel x Control reaction: Alarm display. Alarms.
Root Cause Summary
Alarm 10223 occurs when a modal G-code or command is programmed multiple times in the same NC block, creating a conflict. The SINUMERIK control cannot execute contradictory or duplicate commands simultaneously within a single block. This is typically caused by programming errors, macro expansions, or cycle definitions that generate conflicting commands.
Safety
- Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.
Causes and Fixes
- 1
Note the channel number (%1) and command (%2) displayed in the alarm message to identify the conflicting command.
- 2
Press the alarm softkey and review the NC program line number where the alarm occurred. Examine the complete NC block for duplicate or conflicting G-codes.
- 3
Check for commands from the same modal group (motion G-codes: G00/G01/G02/G03, plane selection: G17/G18/G19, coordinate systems: G54-G59, etc.) appearing multiple times in the block.
- 4
Remove the duplicate or conflicting command from the NC block, keeping only the intended command. Reset the alarm and restart the program.
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