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MELSEC-Q/QnA
2 INSTRUCTION TABLES
2.5.16 Peripheral device instructions
Table 2.33 Peripheral Device Instructions
Category
Instruction
Symbols
Symbol Processing Details
Execution
Condition
Number of
Basic Steps
Subset
See for
Description
MSG MSG S
• Stores message designated by (S) at
QnACPU.
This message is displayed at the
peripheral device
2 7-303
Input/
output to
peripheral
devices
PKEY
PKEY D
• Data input from the peripheral device is
stored at device designated by (D).
2 7-305
2.5.17 Program instructions
Table 2.34 Program Instructions
Category
Instruction
Symbols
Symbol Processing Details
Execution
Condition
Number of
Basic Steps
Subset
See for
Description
PSTOP
PSTOP
Program Name
PSTOPP
PSTOPP
Program Name
• Places designated program in standby
status
2
+
n
7-308
POFF
POFF
Program Name
POFFP
POFFP
Program Name
• Turns OUT instruction coil of designated
program OFF, and places program in
standby status.
2
+
n
7-309
PSCAN
PSCAN
Program Name
PSCANP
PSCANP
Program Name
• Registers designated program as scan
execution program.
2
+
n
7-311
PLOW
PLOW
Program Name
Switching
program
execution
statuses
PLOWP
PLOWP Program Name
• Registers designated program as low-
speed execution program.
2
+
n
7-313
: n ([number of program name characters] / 2) indicates a step. (Decimal fractions are rounded up.)
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