Abnormal PLC heartbeat (For ER series, version V5.0)

5600

Alarm cause: The controller is disconnected from the PLC

Corrective measures: Check whether the communication heartbeat with the PLC is normal

Applicable equipment

Source: Fault JSON · ESTUN_fault_codes_zh_en.json · SHA-256 e318b3bb20315d070a7f50bd7649bf7dfd7d178030a4f7c736a5aa22f48095f9 · 5600

Brand	ESTUN
Updated	2026-10-27

5600

Alarm cause: The controller is disconnected from the PLC

Corrective measures: Check whether the communication heartbeat with the PLC is normal

Applicable equipment

Source: Fault JSON · ESTUN_fault_codes_zh_en.json · SHA-256 e318b3bb20315d070a7f50bd7649bf7dfd7d178030a4f7c736a5aa22f48095f9 · 5600

Brand	ESTUN
Updated	2026-10-27