Mitsubishi Electric NZ2GFSS2 32D S1 User Manual page 96

■Double input discrepancy detection (with discrepancy detection time not specified)
When "Double input discrepancy detection setting" is set to "0: Detect" and "Double input discrepancy detection type" is set to
"1: Discrepancy detection time not specified" from the "Parameter Processing of Device Station" window, no input error occurs
even though the discrepancy state of double inputs continues. When both input signals turn on and remain on for 500ms, a
double input discrepancy detection error occurs as an input error.
The following shows the operation details of the double input discrepancy detection (with discrepancy detection time not
specified) for double wiring inputs X0 and X1. The operation is explained for two cases: when a double input discrepancy
detection error does not occur and when that error occurs.
• When a double input discrepancy detection error does not occur
When the discrepancy (ON/OFF or OFF/ON) state of input terminals continues for longer than 500ms after changed from ON/
ON state, the double input discrepancy is detected and the double input discrepancy detection state is applied. The minor
error (double input discrepancy detection error) does not occur. After that, if OFF/OFF state of input terminals is detected, the
double input discrepancy detection state is eliminated.
Input terminal status: X0
Input terminal status: X1
Double input discrepancy detection
Error status flag
(1) Detects a double input discrepancy.
(2) The double input discrepancy detection state is eliminated when the state of input terminals (X0, X1) becomes OFF/OFF.
(3) When a time lag between each input terminal (X0, X1) returning to ON state is 500ms or shorter, SA\X0 and SA\X1 are turned on as well.
(4) A double input discrepancy detection error does not occur.
8 FUNCTIONS
94
8.3 Input Diagnostic Function
500ms
(1)
(X0, X1)
SA\X0
SA\X1
500ms
(2)
Both OFF
(3)
(4)