Melsec-q, 4 settings and procedures prior to operation – MITSUBISHI ELECTRIC QJ71C24N User Manual
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MELSEC-Q
4 SETTINGS AND PROCEDURES PRIOR TO OPERATION
(Procedure 5) Ending the loopback test
Perform the following procedure according to the function used, and start data
communication.
• Set the switch settings with GX Developer according to the procedure specified in
Section 4.5.2.
• Turn on the power to the station on which the Q series C24 is installed.
An example of control procedure when the TT command is used in the loopback
test mentioned in Procedure 3.
(Station number: 00, sum check code: Yes)
PLC CPU side
(Example)
(Data name)
External
device side
Header data sent
by the external device
TT (ACPU common command)
Two characters (hexadecimal) … Designate the number of characters (1 to 254) of return data to be
sent immediately afterward.
Designate with a text string consisting of "0" to "9" and "A" to "F" (capital letter)
(In case of format 1)
Two characters (hexadecimal)
Character A part
Becomes the
same data
Header data to be sent by
the PLC CPU
Character B part
S
T
X
E
T
X
02
H
30
H
30
H
46
H
46
H
30
H
35
H
41
H
42
H
43
H
44
H
45
H
03
H
41
H
33
H
H L
0 0
H L
F F
H L
0 5 A B C D E
H
L
A
3
E
N
Q
41
H
42
H
43
H
44
H
30
H
37
H
38
H
A B C D E
H
L
7
8
35
H
45
H
30
H
54
H
54
H
46
H
46
H
30
H
30
H
05
H
H L
0 0
H L
F F T T
0
0 5
H L
Station No
.
PC No.
Command
Message wa
it
C
h
aract
e
r l
e
ngth
Loopback data
data with the
length given
by Character
length
Sum check
code
Station No
.
PC No.
C
h
aract
e
r l
e
ngth
Loopback data
data with the
length given
by Character
length
Sum check
code
(Example)
(Data name)