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or the three blocks can be coded first followed by two OR LOADs. The mne-
monic codes for both methods are shown below.
00000
LD
00000
00001
AND NOT
00001
00002
LD NOT
00002
00003
AND NOT
00003
00004
OR LD
—
00005
LD
00004
00006
AND
00005
00007
OR LD
—
00008
OUT
00501
00000
LD
00000
00001
AND NOT
00001
00002
LD NOT
00002
00003
AND NOT
00003
00004
LD
00004
00005
AND
00005
00006
OR LD
—
00007
OR LD
—
00008
OUT
00501
Address
Instruction
Operands
Address
Instruction
Operands
Again, with the method on the right, a maximum of eight blocks can be com-
bined. There is no limit to the number of blocks that can be combined with
the first method.
Both of the coding methods described above can also be used when using
AND LOAD and OR LOAD, as long as the number of blocks being combined
does not exceed eight.
The following diagram contains only two logic blocks as shown. It is not nec-
essary to further separate block b components, because it can be coded di-
rectly using only AND and OR.
00000 00001
00002 00003
00201
00501
00004
Block
a
Block
b
Address
Instruction
Operands
00000
LD
00000
00001
AND NOT
00001
00002
LD
00002
00003
AND
00003
00004
OR
00201
00005
OR
00004
00006
AND LD
—
00007
OUT
00501
Although the following diagram is similar to the one above, block b in the dia-
gram below cannot be coded without separating it into two blocks combined
with OR LOAD. In this example, the three blocks have been coded first and
then OR LOAD has been used to combine the last two blocks, followed by
AND LOAD to combine the execution condition produced by the OR LOAD
with the execution condition of block a.
When coding the logic block instructions together at the end of the logic
blocks they are combining, they must, as shown below, be coded in reverse
order, i.e., the logic block instruction for the last two blocks is coded first, fol-
Combining AND LOAD and
OR LOAD
Basic Ladder Diagrams
Section 4-3
Содержание SYSMAC C200H
Страница 1: ...OPERATION MANUAL C200H CPU01 E 03 E 11 E SYSMAC Programmable Controllers Cat No W130 E1 05 ...
Страница 2: ...C200H Programmable Controllers CPU01 E 03 E 11 E Operation Manual Revised June 2003 ...
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Страница 8: ...TABLE OF CONTENTS ix Glossary 345 Index 363 Revision History 369 ...
Страница 342: ...336 Programmer Program Date Page Word Contents Notes Word Contents Notes Data Storage ...
Страница 374: ...Cat No W130 E1 05 C200H Programmable Controllers CPU01 E 03 E 11 E OPERATION MANUAL ...