Back to all FAQs

question

When your Mitsubishi Q-series PLC suddenly throws 'CPU ERROR 4100' during a critical production run, what's your systematic troubleshooting protocol that balances speed with thoroughness to minimize downtime?

answer

When ERROR 4100 appears, it's typically a division by zero or operation error. First, perform a quick CPU reset to check if it's transient. If it recurs, immediately check the most recent program modifications for division operations (DIV/DDIV) where divisors could be zero. Simultaneously, verify SD card presence if using file operations, and examine BCD conversion values. Document the error code details from diagnostics to pinpoint the exact instruction causing the fault.

Recent Q&A

Quickly browse the latest questions and answers

Contact form