Mitsubishi Electric M800VW Series Programming Manual page 278

M800V/M80V Series PLC Programming Manual (1/2)
8 Function Instructions
8.5 Program Branch Instructions
CALL, CALLP, RET: Sub-routine program calls and return from sub-routine programs
Setting
Bit devices
data
X Y M L F
P
[Instruction symbol] [Execution condition]
CALL
CALLP
RET
 Setting data
Setting data
Pn First pointer number of sub-routine program
 Functions
CALL
 When the CALL (P) instruction is executed, executes the sub-routine program of the program specified by Pn.
Main routine
program
Pn
CALL Pn
END
 CALL or CALLP instructions can be nested up to 8 deep.
POINT
(1) There are the following two pointer numbers to be set by the CALL(P) instruction.
Refer to "4.4.14 Pointer P" for details.
 Local pointer
 Common pointer
RET
 Indicates end of sub-routine program
 When the RET instruction is executed, returns to the step following the CALL(P) instruction which called the sub-routine
program.
Usable devices
B SB T SM V T C
Command
Command
Meaning
Sub-routine
program
RET
Con-
Word devices
stant
D R/ZR W SW SD Z K
257
Digit
Pointer designa- Index
tion
H P
○ ○
CALL Pn
CALLP Pn
RET
Data type
Device name
IB-1501667-B