Omron CPM1 Programming Manual

168
Basic Ladder Diagrams Section 4-3
The following diagram must be broken down into two blocks and each of these
then broken into two blocks before it can be coded. As shown below, blocks a
and b require an AND LOAD. Before AND LOAD can be used, however, OR
LOAD must be used to combine the top and bottom blocks on both sides, i.e.,
to combine a1 and a2; b1 and b2.
The following type of diagram can be coded easily if each block is coded in
order: first top to bottom and then left to right. In the following diagram, blocks
a and b would be combined using AND LOAD as shown above, and then
block c would be coded and a second AND LOAD would be used to combined
it with the execution condition from the first AND LOAD. Then block d would
be coded, a third AND LOAD would be used to combine the execution condi-
tion from block d with the execution condition from the second AND LOAD,
and so on through to block n.
00000 00001 00004 00005
10003
Block
a
Block
b
00006 00007
Block
b2
Block
b1
00002 00003
Block
a2
Block
a1
Blocks a1 and a2
Blocks b1 and b2
Blocks a and b
Address Instruction Operands
00008 AND 00007
00009 OR LD
–
00010 AND LD –
00011 OUT 10003
00001 AND NOT 00001
00002 LD NOT 00002
00003 AND 00003
00004 OR LD
–
00005 LD 00004
00006 AND 00005
00007 LD 00006
00000 LD 00000
Block
a
Block
b
10000
Block
n
Block
c

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)