Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 818

Basic I/O Unit Instructions
External Connections
Timing Chart
I
00
01
02
03
16-key
0
to
9
to
F
D+2
00
to
09
to
15
O
04
0 1 2 3 4 5 6 7 8 9 101112
Once per 12 cycles
0000 0000
D+1 D
Flags
Connect the hexadecimal keypad to Input Unit contacts 0 to 3 and Output Unit
contacts 0 to 3, as shown in the following diagram.
IN
CPM1A-20EDT
OUT
0000 000F
D+1 D
Name Label
Error Flag ER
0000 00F9
D+1 D
Operation
OFF
Section 3-22
F
C D E
8 A
9 B
7
6
5
4
1
0 2
3
Sixteen-key Pad
16-key selection
signals
Status of 16 keys
Turn ON flags corre-
sponding to input
keys (The flags re-
main ON until the
next input.)
ON for a 12-cycle
period if a key is
pressed.
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