Pointer P - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (1/2)
4 Explanation of Devices
4.4 Detailed Explanation of Devices

4.4.14 Pointer P

 What is a pointer?
A pointer is a device used with branch instructions. A total of 4096 points is used in all executed programs.
The reserved pointers use the addresses from 4000 to 4005 separately.
 Pointer applications
 Jump destination designation and label (designation of jump destination head) of jump instruction (CJ, JMP)
X13
Label
P20
 Call destination and label (designation of subroutine program head) of subroutine call instruction (CALL)
X10
Label
P33
 Types of pointers
The details of the pointers differ according to the program method.
[Independent program method]
The following two types of pointers are used.
 General pointer: Pointer which can jump or call with a jump instruction or subroutine call instruction
 Reserved pointer: Pointer with fixed application, such as a start label
[Multi-program method]
The following three types of pointers are used.
 Local pointer: Pointer used independently in each program
 Common pointer: Pointer which can be called with subroutine call instruction from all programs being executed
 Reserved pointer: Pointer with fixed application, such as an END label
IB-1501667-B
Jump to label P20 when
CJ P20
X13 turns ON.
Pointer
CALL P33
Execute sub-routine
program designated with
Pointer
label P33 when X10 turns
ON.
RET
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