Mitsubishi Electric MELSEC iQ-RX40NC6B, Application User'S Manual

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162
10 FUNCTIONS
10.2 Safety Input Function
Input response time setting function
This function helps change the input response time of the input module with diagnostic functions on a per-point basis. The
input module with diagnostic functions takes in external inputs with the set input response times.
Setting procedure
Set the time with "Input response time".
[Navigation window]  [Parameter]  [Module Information]  Target module  [Module Parameter]  [Basic setting] 
"Input response time"
Input response time and pulse width of noise that can be removed
The input module with diagnostic functions may take in noise and others as an input depending on the setting of an input
response time.
The following table lists the minimum widths of pulses that can be taken in as inputs. The pulse widths of noise that can be
removed are smaller than the minimum values in the following table.
Set an input response time with due consideration of the following values and use environment.
When noise occurred
If noise of 200

s or longer occurs, the time required for taking in an external input may become same as or longer than the
input response time because of the filter processing in the module.
Correlation between an input response time and input dark test parameters
An input response time must be set to satisfy the following conditions.
Input response time > Input dark test pulse output time
*1
*1 Input dark test pulse output time = Input dark test pulse OFF time

((Number of pulse output for input dark test

2) -1)
For details on an input dark test, refer to the following.

Page 175 Input dark test function
t: Input response time
Input response time setting value Minimum width of pulse that can be taken in as input (Reference value)
1ms 1.0ms
5ms 5.0ms
10ms 10.0ms
20ms 20.0ms
70ms 70.0ms
OFF
OFF
ON
ON
t t
External input
Input signal in the module