637
Data Control Instructions Section 3-17
3-17-3 LIMIT CONTROL: LMT(680)
Purpose Controls output data according to whether or not input data is within upper
and lower limits.
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Description When the execution condition is ON, LMT(680) controls output data according
to whether or not the specified input data (signed 16-bit binary) is within the
upper and lower limits. The contents of words C and C+1 are as follows:
C and C+1 must have the same area classification.
LMT(680)
S
C
D
S: Input word
C: First limit word
D: Output word
Variations Executed Each Cycle for ON Condition LMT(680)
Executed Once for Upward Differentiation @LMT(680)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area S C D
CIO Area CIO 0 to
CIO 6143
CIO 0 to
CIO 6142
CIO 0 to
CIO 6143
Work Area W0 to W511 W0 to W510 W0 to W511
Holding Bit Area H0 to H511 H0 to H510 H0 to H511
Auxiliary Bit Area A0 to 959 A0 to A958 A448 to A959
Timer Area T0000 to T4095 T0000 to T4094 T0000 to T4095
Counter Area C0000 to C4095 C0000 to C4094 C0000 to C4095
DM Area D0 to D32767 D0 to D32766 D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #0000 to #FFFF
(binary)
---
Data Registers DR0 to DR15 --- DR0 to DR15
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
C Lower limit data (minimum output data)
C+1 Upper limit data (maximum output data)
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