WindO/I-NV4 User’s Manual 30-9
1 Overview
30
Expansion Modules
● Operation with priority on control processing
■ Input refresh
Inputs on the expansion module are reflected in the Input (#I, #D and LEX).
■ Input delay
There is a delay between the expansion module input and the Input (#I, #D and LEX).
The delay time is as follows.
Minimum: 5 milliseconds
Maximum: 5 milliseconds + the execution period
■ I/O control
The script specified as the Cyclic Script executes during I/O control.
■ Output refresh
The Output (#Q, #D and LEY) are output to the expansion module.
Cyclic
Script
Display
processing
Input refresh
Output refresh
Input
Output
External
input
I/O control
Sleep
(Display
processing
executed)
End of processing
for part at bottom
of screen
Start of processing
for part at top
of screen
Execution Period
Execution
Period
External
output
(#I, #D, LEX)
(#Q, #D, LEY)
Input delay
Output
delay
Execution Period
The HG5G/4G/3G/2G-V also performs output refresh when input refreshing.
When an input occurs in the expansion module immediately after the
input refresh ends, the input delay will be the longest because the
processor waits for the input refresh in the next scan before reflecting
the input to the Input (#I, #D and LEX).
Input
Input refresh
Output refresh
I/O control
Sleep
(Display
processing
executed)
Input refresh
Output refresh
I/O control
Input delay
(maximum)
(#I, #D, LEX)
External
input
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