6. BASIC INSTRUCTIONS
6 − 70
MELSEC-A
6.6 Program Switching Instructions
6.6.1 Main ↔ subprogram switching (CHG)
Available Device
Bit device Word (16-bit) device Constant Pointer Level
Carry
flag
Error
flag
X Y M L S B F T C D W R A0 A1 Z V K H P I N
Digit specification
Index
M9012 (M9010, M9011)
Functions (1) Executes switching between the main program and subprogram after the timer/
counter processing and self-diagnostic check, general data processing, data
link/network refresh processing, and I/O processing.
AnS
AnN
AnSH
An A1FX
A3H
A3M
A3V AnA
AnU, A2AS
A2USH-S1
A2USH board
QCPU-A
(A Mode)
A0J2H
A2C
A52G
A73
A3N
boad
Applicable
CPU
X O O X X O O
Remark
*1: A3N only *3: A3A only
*2: A3 only *4: A3U, A4U and Q06H only
Switching command
Interlock contact
CHG
*1
*2 *3
*4
Timer, counter processing Self-diagnostic check,
general data processing, data link/network
refresh processing, and I/O processing.
Sequence program
Sequence program
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