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Haas Controller
Power Supply · Basic · 15 - 30 minutes
Haas Alarm 196 - Control Memory Battery Low
Haas Alarm 196 fires when the internal lithium battery voltage drops below the threshold required to maintain SRAM memory during power-off conditions. This battery preserves machine parameters, work offsets, tool data, and macro programs stored in volatile memory when the control is powered down.
196
Haas Alarm 196 - Control Memory Battery Low
Memory Battery Low
This alarm indicates that the lithium battery on the MOCON board responsible for maintaining SRAM memory and real-time clock data has dropped below the acceptable voltage threshold, typically below 3.0 volts. The battery powers the CMOS memory that retains machine parameters, work offsets, macro variables, and programs when main power is off. If not replaced promptly, all stored data including parameters and programs will be lost when the machine is powered down.
Root Cause Summary
Haas Alarm 196 fires when the internal lithium battery voltage drops below the threshold required to maintain SRAM memory during power-off conditions. This battery preserves machine parameters, work offsets, tool data, and macro programs stored in volatile memory when the control is powered down.
Safety
- Data may be lost if battery dies
- All stored data will be lost if battery dies completely
- Power down the CNC machine before replacing the battery to avoid electrical shock or damage to the control system. Refer to the machine's safety procedures.
- Be careful when handling batteries. Some batteries may contain corrosive materials. Wear appropriate personal protective equipment (PPE) such as gloves and eye protection.
- Ensure the replacement battery is the correct type and voltage as specified in the machine's manual. Using an incorrect battery can damage the control system.
- Avoid short-circuiting the battery terminals during replacement. This can cause sparks, heat, and potential battery damage.
- Properly dispose of the old battery according to local regulations.
- Ensure the machine is powered off and unplugged before battery replacement to avoid electrical hazards
Causes and Fixes
- 1
Check battery voltage
Navigate to SETTING > DIAGNOSTICS > BATTERY to view current battery voltage. Normal voltage should read 3.0-3.6V.
Document the exact voltage reading for trending battery degradation over time
- 2
Backup machine data
Use SETTING > PARAMETERS > BACKUP to save all parameters, offsets, and tool data to CF card or USB before battery replacement.
Always backup data before battery replacement to prevent total memory loss
- 3
Replace lithium battery
Power down control, replace 3V lithium battery (typically CR2032 or equivalent) located on main control board behind operator panel.
Replace battery within 15 minutes to minimize memory loss risk
- 4
Verify alarm clearance
Power up control and confirm Alarm 196 clears. Check SETTING > DIAGNOSTICS > BATTERY shows voltage above 3.0V.
Reset alarm history after successful battery replacement using SETTING > ALARMS > CLEAR HISTORY
Call a technician if:
- ·Control board voltage monitoring circuit suspected
- ·Repeated alarms after battery replacement
- ·Extensive parameter corruption requiring machine recalibration
Prevention
- Replace battery every 3-5 years preventively
- Maintain regular parameter backups to CF card
- Monitor battery voltage monthly in diagnostics screen
- Avoid extended power-off periods when battery voltage below 3.0V
Common Mistakes
- Ignoring alarm until complete memory loss occurs
- Not backing up data before battery replacement
- Using incorrect battery type or voltage
- Failing to verify alarm clearance after replacement
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