Applicable Systems
1020
1040
1060
Symptoms
Alarm 191: Non-compliance with the syntax in structured programming structured programming prohibited in MDI mode the index of a FOR loop must be: an L variable, a symbolic variable or a parameter E80000, E81000 or E82000 non-compliance with the syntax of PUSH and PULL instructions DO missing after WHILE programming of IF, THEN, ELSE in MDI mode. The NUM NUM 1020/1040/1060 CNC system displays this alarm on the operator panel.
Possible Causes
- Refer to the machine manual for detailed cause analysis
- Check related sensors, switches, and parameters
Troubleshooting Steps
- Step 1: Read alarm 191 on the CNC display and note the full alarm message
Alarm code and description displayed for diagnosis - Step 2: Check the machine status and identify any obvious mechanical, electrical, or pneumatic issues
Visible faults identified or confirmed as intermittent - Step 3: Consult the manufacturer manual for alarm-specific troubleshooting procedures
Root cause identified per manufacturer guidelines - Step 4: Apply the recommended fix and reset the alarm
Alarm cleared and machine resumed normal operation
How to Reset
To reset alarm 191: 1) Address the root cause. 2) Press the RESET key on the CNC panel. 3) If the alarm persists, cycle power to the control. Caution: Repeated alarms without fixing the cause may cause damage.
Frequently Asked Questions
- Q: What does alarm 191 mean?
Alarm 191 corresponds to: Non-compliance with the syntax in structured programming structured programming prohibited in MDI mode the index of a FOR loop must be: an L variable, a symbolic variable or a parameter E80000, E81000 or E82000 non-compliance with the syntax of PUSH and PULL instructions DO missing after WHILE programming of IF, THEN, ELSE in MDI mode. This is a NUM 1020/1040/1060 system alarm that typically requires checking machine state and the manufacturer manual.
Source: HelmanCNC.com - https://www.helmancnc.com/num-cnc-control-errors-list/
Category: CNC