Input Diagnostic Function; Double Input Discrepancy Detection Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

Cc-link ie field network waterproof/dustproof remote i/o module (with safety functions)
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7.3

Input Diagnostic Function

Double input discrepancy detection function

This function discriminates failures by monitoring the discrepancy state of doubled safety remote inputs (SA\X).
When the discrepancy state is detected, a minor error occurs. The module will recover from the error by eliminating its cause.
Double input discrepancy detection
When the discrepancy state of double inputs continues for the set time or longer, a double input discrepancy detection error
occurs as an input error. For the double input discrepancy detection time, refer to the following.
Page 54 Double input discrepancy detection time
The following shows the operation details of the double input discrepancy detection for double wiring inputs (NC/NC
connection), X0 and X1.
Input terminal status: X0
Input terminal status: X1
SA\X0
SA\X1
Error status flag
(1) After the double input discrepancy detection time elapses, a double input discrepancy detection error occurs.
■Operation at error detection
When the discrepancy state of double inputs continues for the set time or longer, the minor error (double input discrepancy
detection error) state is applied to the safety remote I/O module. For the minor error state, refer to the following.
Page 95 Error Code List
The corresponding input points are turned off when the discrepancy state of inputs occurs.
Double input
discrepancy time
ON
OFF
ON
ON
Both OFF
OFF
ON
OFF
OFF
(1)
ON
7.3 Input Diagnostic Function
7
7 FUNCTIONS
53

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