Input Delay Function - Mitsubishi Electric MELSEC iQ-RX40NC6B Application User's Manual

Input delay function

This function allows changing the status of an X signal in the module after a certain time (input delay time) elapsed when the
status of the external input changes.
The input delay function has the following three functions.
• OFF delay
• ON delay
• Pulse stretch
• The input delay time does not include the external input response time.
• The input delay time is set in the range of 1 to 150000 (in increments of 400s, 400s to 60s).
• The accuracy of the input delay time is from 0 to 400s.
• When the inter-module synchronization function is used, the input delay function cannot be used together.
(The settings for the input delay function are ignored.)
• The OFF delay, ON delay, and pulse stretch can be enabled only individually.
OFF delay
When an external input turns off, this function turns off the X signal after a certain time (input delay time) elapsed.
When the input delay time is set to a value larger than the scan time while the OFF delay is used, the program can recognize
that the external input turns on even if its ON time is short.
Even when the external input device is replaced, the program can be used as it is only by changing the setting value of the
input delay time.
■Operation of the OFF delay
The following figure shows an operation example of the OFF delay.
External input (X0)
Input signal in the module (X0)
Input to the CPU module (X0)
tps: Input delay time
ts: Scan time
: END processing of the CPU module
1 FUNCTIONS
24
1.1 Input Function
ON
OFF
ON
OFF
ON
OFF
ts
tps
ts