Input Response Time Setting Function - Mitsubishi Electric MELSEC iQ-RX40NC6B Application User's Manual

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.
External input
Input signal in the module
t: Input response time
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.
Input response time setting value
1ms
5ms
10ms
20ms
70ms
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 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
10 FUNCTIONS
162
10.2 Safety Input Function
ON
OFF
ON
OFF
t
Minimum width of pulse that can be taken in as input (Reference value)
1.0ms
5.0ms
10.0ms
20.0ms
70.0ms
t
*1