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MELSEC-Q/QnA
2 INSTRUCTION TABLES
2.5.18 Other instructions
Table 2.35 Other Instructions
Category
Instruction
Symbols
Symbol Processing Details
Execution
Condition
Number of
Basic Steps
Subset
See for
Description
WDT
WDT
WDT reset
WDTP
WDTP
• Resets watchdog timer during
sequence program
1 7-315
Timing
clock
DUTY
DUTY n1 n2 D
n1 scan
SM420 to SM424, SM430 to SM434
(D)
n2 scan
4 7-317
ZRRDB
ZRRDB nD
ZRRDBP
ZRRDBP nD
Lower 8 bits
(D)
Upper 8 bits
Lower 8 bits
Upper 8 bits
8 bits
0
1
2
3
n
ZR0
ZR1
3 7-319
ZRWRB
ZRWRB n S
ZRWRBP
ZRWRBP n S
Lower 8 bits
(S)
Upper 8 bits
Lower 8 bits
Upper 8 bits
8 bits
0
1
2
3
n
ZR0
ZR1
3 7-321
ADRSET
ADRSET DS
Direct
read/write
operations
in 1-byte
units
ADRSETP
ADRSETP SD
(S) (D)
Indirect address of
designated device
Device name
3 7-323
Numerical
key input
from
keyboard
KEY
KEY D1 D2nS
• Takes in ASCII data for 8 points of input
unit designated by (S), converts to
hexadecimal value following device
number designated by D1, and stores.
5 7-324
ZPUSH
ZPUSH DBatch save
of index
register
ZPUSHP
ZPUSHP D
• Saves the contents of index registers
Z0 to Z15 to a location starting from the
device designated by D.
ZPOP
ZPOP D
Batch
recovery of
index
register
ZPOPP
ZPOPP D
• Reads the data stored in the location
starting from the device designated by
D to index registers Z0 toZ15.
2 7-328
EROMWR
EROMWR D1 D2nS
Batch write
operation
to
E
2
PROM
file register
EROMWRP
EROMWRP D1 D2nS
• Writes a batch of data to E
2
PROM file
register.
5 7-332
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