Battery Error

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This non-fatal error occurs when the PLC Setup is configured to detect battery errors, and the CPU Unit's backup battery is either missing or its voltage has dropped below an acceptable threshold, indicated by A402.04. This can lead to loss of retained data or time upon power cycle.

• The CPU Unit's backup battery is missing.
• The CPU Unit's backup battery voltage has dropped significantly.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Check the CPU Unit's backup battery for presence and voltage level.

2. 2

   Replace the backup battery if its voltage is low or if it is missing.

3. 3

   If battery-free operation is being used, change the battery detection setting in the PLC Setup to disable the error.