564
Double-precision Floating-point Instructions Section 3-15
Variations
Applicable Program Areas
Operand Specifications
Description The input comparison instructions compare the data specified in S
1
and S
2
as
double-precision floating point values (64-bit IEEE754 data) and creates an
ON execution condition when the comparison condition is true. When the data
is stored in words, S
1
and S
2
specify the first of four words containing the 64-
bit data. The 64-bit floating-point data cannot be input as constants.
Inputting the Instructions
The input comparison instructions are treated just like the LD, AND, and OR
instructions to control the execution of subsequent instructions.
Variations Creates ON Each Cycle Comparison is True Input compari-
son instruction
Immediate Refreshing Specification Not supported
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area S
1
S
2
CIO Area CIO 0 to CIO 6140
Work Area W0 to W508
Holding Bit Area H0 to H508
Auxiliary Bit Area A0 to A956
Timer Area T0000 to T4092
Counter Area C0000 to C4092
DM Area D0 to D32764
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Input type Operation
LD The instruction can be connected directly to the left bus bar.
AND The instruction cannot be connected directly to the left bus bar.
OR The instruction can be connected directly to the left bus bar.
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