C60K-CDR-A Omron, C60K-CDR-A Datasheet - Page 53
C60K-CDR-A
Manufacturer Part Number
C60K-CDR-A
Description
PROGRAMMABLE CONTROLLER CPU
Manufacturer
Omron
Datasheet
1.C28P-EDR-A.pdf
(225 pages)
Specifications of C60K-CDR-A
Peak Reflow Compatible (260 C)
No
Leaded Process Compatible
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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The Ladder Diagram
Note TR bits are only used when programming using mnemonic code and are not
TR bits can be used as many times as required as long as the same TR bit is
not used more than once in the same instruction block. Here, a new instruc-
tion block is begun each time execution returns to the bus bar. If more than
eight branching points requiring that the execution condition be saved are
necessary in a single instruction block, interlocks, which are described next,
must be used.
When drawing a ladder diagram, be careful not to use TR bits unless neces-
sary. Often the number of instructions required for a program can be reduced
and ease of understanding a program increased by redrawing a diagram that
would otherwise required TR bits. With both of the following pairs of dia-
grams, the versions on the top require fewer instructions and do not require
TR bits. The first example achieves this by merely reorganizing the parts of
the instruction block; the second, by separating the second OUTPUT instruc-
tion and using another LOAD instruction to create the proper execution con-
dition for it.
necessary when inputting ladder diagrams directly, as is possible from a
GPC. The above limitations on the number of branching points requiring TR
bits and considerations on methods to reduce the number of programming
instructions still hold.
0000
0000
0001
0000
0001
0000
0001
TR 0
TR 0
0004
0002
0004
0002
0001
0001
0003
0003
Instruction 2
Instruction 1
Instruction 1
Instruction 2
Instruction 1
Instruction 2
Instruction 1
Instruction 2
Section 4-3
41
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