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Data Movement Instructions Section 5-18
Example The following example shows instruction ASFT(17) used to shift words in an
11-word shift register created between DM 0100 and DM 0110 with C=#6000.
Non-zero data is shifted towards St (DM 0110).
Note The zeroes are shifted “upward” if C=4000, and the entire shift register is set
to zero if C=8000.
5-18 Data Movement Instructions
5-18-1 MOVE – MOV(21)
Limitations DM 6144 to DM 6655 cannot be used for D.
Description When the execution condition is OFF, MOV(21) is not executed. When the
execution condition is ON, MOV(21) copies the content of S to D.
Precautions TIM/CNT numbers cannot be designated as D to change the PV of the timer
or counter. You can, however, easily change the PV of a timer or a counter by
using BSET(71).
Flags ER: Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
ASFT(17)
#6000
DM 0100
DM 0110
00000
Address Instruction Operands
00000 LD 00000
00001 ASFT(17)
# 6000
DM 0100
DM 0110
DM 0100 1234 1234 1234
DM 0101 0000 0000 2345
DM 0102 0000 2345 3456
DM 0103 2345 0000 4567
DM 0104 3456 3456 5678
DM 0105 0000 4567 6789
DM 0106 4567 0000 789A
DM 0107 5678 5678 0000
DM 0108 6789 6789 0000
DM 0109 0000 789A 0000
DM 0110 789A 0000 0000
Before
execution
After one
execution
After seven
executions
S: Source word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #
D: Destination word
IR, SR, AR, DM, EM, HR, LR
Ladder Symbols Operand Data Areas
MOV(21)
S
D
@MOV(21)
S
D
Source word Destination word
Bit status
not changed.
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