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RAM Errors Relay Flags

RAM Error Relay Flags (F007)​

The RAM error flags, F007, indicate mismatches or errors in the PLC's input/output (I/O) modules.
These flags help diagnose configuration problems, hardware issues, or communication faults.

I/O Error Relay Flags
Flag BitNameDescriptionUse Case
F007.0
~
F007.7		RAM Error (Slot Storage)ON (1) if Dual Port RAM access errors occur for a slot
Number of differing slots (0 ~ 11) is stored		Diagnose and resolve slot-based Dual Port RAM errors
F007.8
~
F007.F		RAM Error (Expansion Storage)ON (1) if Dual Port RAM access errors occur for expansions
Number of differing expansions (0 ~ 11) is stored		Diagnose and resolve expansion-related Dual Port RAM errors

F007.0 ~ F007.7 - I/O Error (Slot Storage)​

Description​

The RAM Error (Slot Storage) flag is ON (1) when the reserved I/O configurations differ from the physically mounted chassis I/O configuration.
The range of differing slots stored is 0 ~ 11.

Use Case​

  • Detect and resolve slot-based mismatches in I/O configurations.
  • Ensure that all reserved slots match the physical hardware setup.

F007.8 ~ F007.F - I/O Error (Expansion Storage)​

Description​

The RAM Error (Expansion Storage) flag is ON (1) when the reserved I/O configurations differ from the physically mounted chassis I/O configuration.
The range of differing expansions stored is 0 ~ 11.

Use Case​

  • Identify mismatches in connected expansion modules.
  • Ensure expansion configurations align with the program's reserved setup.