Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual CALL, Callp 3 steps

DVP - ES2/SA2/SS2/SA2/SX2/SE Operation Manual - Programming

API

01

Mnemonic Operands Function Controllers

CALL	P	Call Subroutine	ES2/EX2	SS2	SA2	SX2
					SE

OP Valid Range

P0~P255

Program Steps

CALL, CALLP: 3 steps

	PULSE				16-bit				32-bit
ES2/EX2	SS2	SA2	SX2	ES2/EX2	SS2	SA2	SX2	ES2/EX2	SS2	SA2	SX2
		SE				SE				SE

Operands:

S: The destination pointer P of the call subroutine.

Explanations:

1.When the CALL instruction is active it forces the program to run the subroutine associated with the called pointer.

2.A CALL instruction must be used in conjunction with FEND (API 06) and SRET (API 02) instructions.

3.The program jumps to the subroutine pointer (located after an FEND instruction) and processes the contents until an SRET instruction is encountered. This forces the program flow back to the line of ladder immediately following the original CALL instruction.

Points to note:

1.Subroutines must be placed after FEND instruction.

2.Subroutines must end with SRET instruction.

3.CALL pointers and CJ instruction pointers are not allowed to coincide.

4.CALL instructions can call the same CALL subroutine any number of times.

5.Subroutines can be nested 5 levels including the initial CALL instruction. (If entering the six levels, the subroutine won’t be executed.)

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