Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 127

Sequence Input Instructions
Operand Specifications
Description
Flags
Precautions
94
Area
CIO Area CIO 0.00 to CIO 6143.15
Work Area W0.00 to W511.15
Holding Bit Area H0.00 to H511.15
Auxiliary Bit Area A0.00 to A959.15
Timer Area T0000 to T4095
Counter Area C0000 to C4095
Task Flag Area TK00 to TK31
Condition Flags ER, CY, N, OF, UF, >, =, <, >=, <>, <=, ON, OFF, AER
Clock Pulses 0.02 s, 0.1 s, 0.2 s, 1 s, 1 min
TR Area ---
DM Area ---
Indirect DM addresses ---
in binary
Indirect DM addresses ---
in BCD
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing ,IR0 to ,IR15
using Index Registers
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
AND is used for a normally open bit connected in series. AND cannot be
directly connected to the bus bar, and cannot be used at the beginning of a
logic block. If there is no immediate refreshing specification, the specified bit
in I/O memory is read. If there is an immediate refreshing specification, the
status of the CPU Unit's input terminal is read.
There are no flags affected by this instruction.
Differentiate up (@) or differentiate down (%) can be specified for AND. If dif-
ferentiate up (@) is specified, the execution condition is turned ON for one
cycle only after the status of the operand bit goes from OFF to ON. If differen-
tiate down (%) is specified, the execution condition is turned ON for one cycle
only after the status of the operand bit goes from ON to OFF.
Immediate refreshing (!) can be specified for AND. An immediate refresh
instruction updates the status of the input bit for CPU Unit built-in inputs just
before the instruction is executed.
For AND, it is possible to combine immediate refreshing and up or down differ-
entiation (!@ or !%). If either of these is specified, the input is refreshed from
the CPU Unit just before the instruction is executed and the execution condi-
tion is turned ON for one cycle only after the status goes from OFF to ON, or
from ON to OFF.
Section 3-2
AND bit operand