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5-3
LD,LDI,AND,ANI,OR,ORI
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5.1 Contact Instructions
5.1.1 Operation start, series connection, parallel connection (LD,LDI,AND,ANI,OR,ORI)
AND, ANI
(1) AND is the A contact series connection instruction, and ANI is the B contact series
connection instruction. They read the ON/OFF data of the designated bit device*
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, perform
an AND operation on that data and the operation result to that point, and take this value as
the operation result.
*2: When a bit designation is made for a word device, the device turns ON or OFF depending on the 1/0 status of
the designated bit.
(2) There are no restrictions on the use of AND or ANI, but the following applies with a
peripheral device used in the ladder mode:
(a) Write ......... When AND and ANI are connected in series, a ladder with up to 24 stages
can be displayed.
(b) Read......... When AND and ANI are connected in series, a ladder with up to 24 stages
can be displayed. If the number exceeds 24 stages, up to 24 will be
displayed.
OR, ORI
(1) OR is the A contact single parallel connection instruction, and ORI is the B contact single
parallel connection instruction. They read ON/OFF information from the designated
device*
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, and perform an OR operation with the operation results to that point, and use the
resulting value as the operation result.
*3: When a bit designation is made for a word device, the device turns ON or OFF depending on the 1/0 status of
the designated bit.
(2) There are no limits on the use of OR or ORI, but the following applies with a peripheral
device used in the ladder mode.
(a) Write ......... OR and ORI can be used to create connections of up to 23 ladders.
(b) Read......... OR and ORI can be used to create connections of up to 23 ladders.
The 24th or subsequent ladders cannot be displayed properly.
Remark
Word device bit designations are made in hexadecimal.
Bit b11 of D0 would be D0.0B.
See 3.2.1 for more information on word device bit designation.