How To View Instructions - Mitsubishi Electric A800 Programming Manual

How to view instructions

3.24

How to view instructions

The subsequent descriptions shall be in the following format.
1)
2)
5)
6)
7)
8)
Description
1) Indicates the item number, instruction overview and instruction symbol.
2) Devices that can be used by instructions are marked with .
3) When a bit device is used, this indicates digit specifications that can be set in the instruction required by the digit
specification.
4) When an operation error occurs, instructions whose error flags turn ON are marked with .
5) Indicates the format in ladder mode.
6) Describes the instruction.
7) Indicates the execution conditions of the instruction.
8) Indicates the program example in ladder mode and list mode.
118
Sequence program
Sequence instructions
3.25.4
Output instruction: device set, reset ... SET, RST
Applicable device
Word (16-bit)
Bit device
X Y M T
SET
D
RST
SET input
RST input
Function
SET
• When SET input is turned ON, the specified device turns ON.
• A device that was turned ON remains ON even if the SET input is turned OFF. It can be turned OFF with the RST
instruction.
SET input
RST input
• When the SET input is OFF, the device state does not change.
Execution condition
The SET and RST instructions are executed for each scan.
NOTE
• The number of steps is three when the following devices are used.
SET instruction ... Special relay (M)
RST instruction ... Special relay (M), all word devices
Program example
SET RST
,
• Program that sets Y8 (ON) when X8 turns ON, and resets Y8 (OFF) when X9 turns ON.
Constant Level
device
C D K H N
SET
RST
3) 4)
Error flag
Digit
specification
(SM0)
Device number to set (ON)
D
Device number to reset
Coding