Control Procedure Format 1 - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Computer Link
6.4.1

Control procedure format 1

The table below shows the control procedure for format 1.
Description
When
computer
reads data
from PLC
When
computer
writes data to
PLC
Remarks
D-48
Transfer order
E
N
Q
Computer side
PLC side
E
N
Q
Computer side
PLC side
Transfer order
1) The sum check code is added only when "sum check code provided" is selected.
The sum check code is not added when "sum check code not provided" is selected.
2) When "sum check code provided" is selected, the sum check is executed only to the character
areas marked with "*" in the figure above.
3) The contents of "Character area A", "Character area B" and "Character area C" vary depending
on the contents of transfer, but do not vary depending on the control procedure format.
Control procedure (protocol)
*
Character
area A
S
T
X
or
N
A
K
*
Character
area C
A
C
K
or
N
A
K
For details on character contents, refer to "7. Commands".
6 Control Procedures and Setting Methods
6.4 Basic Formats of Dedicated Protocol
N
A
K
or
A
C
K
E
Character
T
area B
X
*