Quick-Response Inputs; Cpm1/Cpm1A Quick-Response Inputs - Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual

Quick-response Inputs

2-14 Quick-response Inputs

2-14-1 CPM1/CPM1A Quick-response Inputs

Quick-response Operation
Setting Quick-response
Inputs
The CPM1/CPM1A have quick response inputs that can be used to enable in-
putting shorter signals.
All 10-point CPU Units have 2 quick-response input terminals and the 20-, 30-,
and 40-point CPU Units have 4 quick-response input terminals. The same termi-
nals are used for quick-response inputs and interrupt inputs.
Quick-response inputs have an internal buffer, so input signals shorter than one
cycle can be detected. Signals with a pulse width as short as 0.2 ms can be de-
tected, regardless of their timing during the PC cycle.
Overseeing
processes
Input signal
(00003)
IR 00003
CPU Unit
10-point CPU Units
20-, 30-, 40-point CPU Units
The input bits in the above table can be set as quick-response inputs in
DM 6628, as shown in the following table.
Word Settings
DM 6628 DM 6628 0: Normal input 0: Normal input
1: Interrupt input
2: Quick-response input 2: Quick response input
(Default setting: 0) (D f lt tti
Setting for input 00006: Set to 2
Setting for input 00005: Set to 2
Setting for input 00004: Set to 2
Setting for input 00003: Set to 2
Program Example
In this example, DM 6628 has been set to 0002.
25315 First Cycle Flag
ON for 1 cycle
@INT(89)
Program I/O Overseeing
execution refreshing processes
One cycle
Input bits
IR 00003 to IR 00004
IR 00003 to IR 00006
0)
Bit
15
DM 6628
Mask/unmask input interrupts.
000
000
#000E Unmasks 00003 (interrupt input 0), masks others.
Section 2-14
Program I/O
execution refreshing
Min. input pulse width
0.2 ms
0
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