Ladder Programming Example - Omron SYSMAC C Series Operation Manual

Functions and User Programming
Sign bit, bit 11

2-3-2 Ladder Programming Example

Connections
IR 001
IR 002
Input
point 1
Input
point 2
Analog Input Unit Output Unit
Relationship Between Input Signals and A/D Conversion Data
Decimal equivalent
of binary code
–10 V
(–5 V)
The following example program uses a 1 to 5 V input-range Analog Input Unit to
convert two different analog input signals to 4-digit BCD values (4,095 maxi-
mum) and outputs the result.
IR 003
Input point 1
4-digit BCD
output.
0 00 0
1 01 1
2 02 2
3 03 3
0
X 10
4 04 4
5 05 5
6 06 6
7 07 7
1
X 10
8 COM 8
9 08 9
10 09 10
11 10 11
12 11 12
2
X 10
13 12 13
14 13 14
15 14 15
16 15 16
3
X 10
17 COM 17
18 18
19 19
Output Unit
0 V
IR 004
Input point 2
4-digit BCD
output.
00
01
02
03
0
X 10
04
05
06
07
1
X 10
COM
08
09
10
11
2
X 10
12
13
14
15
3
X 10
COM
Section 2-3
Analog input
10 V
(5 V)
IR 005
0 00
Input point 1
1 01
disconnected
output
2 02
3 03
4 04
5 05
6 06
7 07
8 COM
9 08
Input point 2
10 09 disconnected
output
11 10
12 11
13 12
14 13
15 14
16 15
17 COM
18
19
Output Unit
15