Error History Registration Function - Mitsubishi Electric MELSEC QS Series User Manual

4
FUNCTIONS

4.2.11 Error history registration function

When a moderate error (causing I/O stop) occurs at a safety remote station, or when a
communication fault occurs between a safety master station and a safety remote station,
the error information is saved in the safety CPU module as an error log.
(1) When a moderate error occurred on a safety remote station
Safety remote I/O station
(2) When a communication error occurred between the safety master station and
safety remote stations
(2) Error information transferred from
Safety remote I/O station
(3) Error information transferred from the
safety master module is registered to
the error history.
the safety master module is registered
to the error history.
Communication
fault occurred
4.2 Detailed Explanation of Functions
4.2.11 Error history registration function
Safety CPU module
Safety master module
(2) Error information from a safety remote
station is transferred to the safety CPU
module.
(1) If a moderate error is
detected, this station sends
an error notification to the
safety master module.
Safety remote
I/O station
Safety CPU module
Safety master module
(1) When an error is detected in
communication with a safety remote
station, the error information is
transferred to the safety CPU.
Safety remote I/O station
Safety remote I/O station
Safety remote I/O station
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