Mitsubishi Electric CC-Link IE-NZ2GNSS2-16DTE, Руководство пользователя

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8 FUNCTIONS
8.5 Input Diagnostic
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8
Double input discrepancy detection time
When the double input discrepancy detection time is set, an error does not occur during the set detection time even if double
input discrepancy occurs. The following table lists the relation of each double input evaluation result and the double input
discrepancy detection time.
*1 n: Even number of 0 to 6
*2 m: Safety device address (even number of 0 to 6) assigned to the master station
■
Setting method
Set the double input discrepancy detection time in "Double input discrepancy detection time" from the "Parameter of Slave
Station" window of the engineering tool.
*1 n: Even number of 0 to 6
A double input discrepancy error is detected in signals after the input response time has elapsed. Therefore,
the time taken from when actual signals are in the discrepancy state until when a double input discrepancy
detection error (error code: 0203H) occurs is equal to the input response time + double input discrepancy
detection time.
■
Reference for the double input discrepancy detection time
• For mechanical switches and sensor inputs
Set the time based on the following values: 100ms for mechanical switches and 20ms for sensor inputs.
• When the synchronous time for double inputs can be defined
For the input devices whose synchronous time specifications is open to the public, set the double input discrepancy detection
time considering the safety factor for the false detection.
Use the safety factor of 2 times or higher and set the double input discrepancy detection time to prevent false detection
depending on the input devices used.
Ex.
When the synchronous time is 1s, 2s shall be set as the double input discrepancy detection time considering the safety factor
of 2 times.
• When the synchronous time for double inputs cannot be defined
When the synchronous time cannot be defined for the application, such as usage of a door switches that are opened or closed
manually, set the maximum time or set "1: Do not detect" in "Double input discrepancy detection setting". Even when "1: Do
not detect" is set, the system stops when one of the input signals turns off. Therefore, safety is ensured by inspecting the
safety remote I/O module periodically at a sufficiently short interval.
Input terminal state Time passed after the
discrepancy state is applied Safety remote input Evaluation result of double
inputs
Xn
*1
Xn+1
*1
SA\Xm
*2
SA\Xm+1
*2
OFF OFF

OFF OFF OFF (Normal)
OFF ON < Double input discrepancy
detection time OFF OFF OFF (Discrepancy)
OFF ON

Double input discrepancy
detection time
OFF OFF Double input discrepancy
detection error
ON OFF < Double input discrepancy
detection time OFF OFF OFF (Discrepancy)
ON OFF

Double input discrepancy
detection time
OFF OFF Double input discrepancy
detection error
ON ON

ON ON ON (Normal)
Item Setting range
Double input discrepancy detection time Xn, Xn+1
*1
1 to 6000(

10ms)