Mitsubishi Electric MELSEC-Q/L Programming Manual page 467

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[Operation performed after subroutine program execution]

Before the execution

of subroutine program

*1 Stores the execution result of the subroutine program.

*2 Replaced by the value of the function device.

• Up to 16 nesting levels are possible with the CALL(P) instruction. However, this 16 levels is the total number of levels in the

CALL(P), FCALL(P), ECALL(P), EFCALL(P), and XCALL instructions.

• Devices which are turned ON within subroutine programs will be latched even if the subroutine program is not executed.

Devices which are turned ON during the execution of a subroutine program can be turned OFF by the execution of the

FCALL(P) instruction.

Operation error

• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.

Error details

The device specified for the argument cannot be secured for the data size.

There is no subroutine program for the pointer specified in the CALL (P)

instruction.

After the CALL (P) instruction was executed, the END, FEND, GOEND, or

STOP instruction was executed prior to the RET instruction.

The RET instruction was executed prior to the CALL (P) instruction.

The 17th nesting level is executed.

Immediately after the execution

of CALL instruction

At the time of subroutine

program execution

After the execution

of RET instruction

7 APPLICATION INSTRUCTIONS

7.6 Structure Creation Instructions