Program Low Speed Execution Registration Instruction (Plow(P)) - Mitsubishi MELSEC Q Series Programming Manual

7.17.4
Program low speed execution registration instruction
(PLOW(P))
PLOW(P)
PLOW
PLOWP
Setting
Data
S
Function
(1) Sets the program whose file name is being stored at the device designated by
low-speed execution type.
(2) Only the programs stored in the drive No. 0 (program memory/internal RAM) can be set as
the low speed execution type.
(3) Designated programs assume the low speed execution type with END processing.
Example
When programs A, B, and C exist and program A performs "PLOW" of program D.
(Assume that the constant scan has been set.)
(4) This instruction will be given priority even in cases when a program execution type has been
designated in the parameters.
(5) It is not necessary to designate the extension (.QPG) with the file name.
(Only .QPG files will be acted on.)
Operation Error
(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and
an error code is stored into SD0.
• The program with the designated file name does not exist.
• There is a CHK instruction contained within the program whose file name has been
designated.
Command
Command
: File name of the program to be set as a low speed execution type, or head number of the devices where the
S
file name is stored (character string)
Internal Devices
R, ZR
Bit Word
––
Waiting for constant
A B C END
Scan
High
Basic
performance
J \
U \G
Bit Word
––
A B C
Execution of
PLOW
Scan
PLOW(P)
Process
Redundant Universal LCPU
PLOW S
PLOWP S
Constants
Zn Other
$
––
in
S
END D
Program D
is executed
(Error code: 2410)
(Error code: 4235)
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