Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 564

Ex.
Correct operation: While D0 is specified for FD0 in the subroutine program, D4 is used in the subroutine program.
M0
P0 M0
Before the execution of
the subroutine program
D0
0
D1
10
D2
100
D3 1000
0
D4
(3)
(3)
FD0
(3)
(3)
(1) The operation result of the subroutine program is stored.
(2) These values are replaced with the function device values.
(3) Undefined values are stored.
• Up to 16 CALL(P) instructions can be nested. Note that the 16-level nesting is the total of the CALL(P), FACLL(P),
ECALL(P), EFCALL(P), and XCALL instructions.
CALL P0
FEND
END
• Devices which are turned on in the subroutine program hold the on state even when the subroutine program is not
executed. The on state can be changed to off by executing the FCALL(P) instruction.
Precautions
• An FBD/LD program cannot be created as a subroutine program.
• FBD/LD does not support the execution of a subroutine program with an argument.
Operation error
Error code Description
(SD0)
2820H The device specified in an argument from (s1) to (s5) cannot be secured for the data size.
3360H More than 16 CALL(P) instructions are nested. (The 17th instruction is executed.)
3380H The subroutine program corresponding to the pointer specified by (P) does not exist.
3381H After execution of the CALL(P) instruction, the END, FEND, GOEND, or STOP instruction is executed before the RET instruction.
3382H The RET instruction is executed before the CALL(P) instruction.
7 APPLICATION INSTRUCTIONS
562
7.4 Structure Creation Instructions
/
Immediately after the execution
of the CALL instruction
D0
0
D1
10
D2
100
D3 1000
0
D4 D4 D4
0
10
FD0
100
1000
P0
P10
CALL P10 CALL
RET RET
CALL P0 D0
FEND
K100 K3 FD0
+ K100 D4
RET
At the execution of
the subroutine program
D0
0
D1
10
D2
100
D3 1000
100
D4
33
1
FD0
100
1000
P20
P20
RET
After the execution of
the RET instruction
D0 D0 D0 D0 D0
33
D1 D1
1
D2 D2
100
D3 D3 1000
(1)
100
D4 D4 D4
(1) (3)
(1) (3)
FD0
(3)
(3)
(2)
(2)
(2)
(2)