Mitsubishi Electric GT16, User Manual

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61. MICROCOMPUTER CONNECTION (SERIAL)
61.5 Message Formats
61 - 37
60
CONNECTION T
O
MURA
T
E
C
CONTROLL
ER
61
MI
C
R
O
C
OMPUTER
CONNECTION (SE
R
IA
L)
62
MICR
OCOMPUTER
CONNECTION (E
T
HE
RN
E
T)
63
MO
D
B
US(R)/
R
T
U
CONNE
C
T
ION
64
MO
DBUS(R)/
TCP
CON
N
E
C
T
ION
65
V
NC(R) S
E
R
V
E
R
CONNECTION
61.5.5 Formats 7 to 10 (QnA compatible 3C/4C frame)

Basic format of data communication
This is the same message format as when communication is performed using the MC protocol (QnA compatible 3C/
4C frame) of the Q/QnA Series serial communication module.
For details of the basic format of data communication, refer to the following manual:
MELSEC-Q/L Corresponding MELSEC Communication Protocol Reference Manual
This section describes items whose settings differ from the MC protocol of the Q/QnA Series serial communication
module, and the dedicated commands for a GOT microcomputer connection.
Example: Request message for the batch read in word units (0401) command in format 8 (QnA compatible 4C frame (format 2))
POINT POINT POINT
QnA compatible 4C frame (format 5)
GOT cannot use the QnA compatible 4C frame (format 5).

Details of data items in message format
POINT POINT POINT
Data code during communication
Communication is performed in ASCII code.
(1) Block No., network No., PLC No., request destination module I/O No. and station No.
Ignored in a microcomputer connection of the GOT.
Specify "00". (The request destination module I/O No. is "0000".)
"00" is converted to a 2-digit ASCII code (Hex) and transmitted from the upper digit.
(The request destination module I/O No. is 4-digit.)
(2) Station No.
Station No. is used to identify the GOT with which the host communicates. (Setting range: 0 to 1F
H
)
The address notated in hexadecimal is converted to a 2-digit ASCII code (Hex) and transmitted from the upper
digit.
The GOT processes only commands whose station No. matches the "Host Address (0 to 31)" set at
"Communication Detail Settings". (The message of command whose station No. does not match is ignored.)
For setting method of "Communication Detail Settings", refer to the following.
61.6.1 Setting communication interface (Communication settings)
Sum check is performed in this range.
05
H
ENQ
(H) (L)
B A
42
H
41
H
Sum check
(H) (L)
Device
code
*
2A
H
D
44
H
(H) (L)
Block No.
0
30
H
0
30
H
(H) (L)
Frame ID
No.
F
46
H
8
38
H
(H) (L)
PLC No.
0
30
H
0
30
H
(H)
Start Device
1
31
H
– –
0
30
H
–
0
30
H
(L)
0
30
H
–
0
30
H
0
30
H
Character A section
(H) (L)
Station No.
0
30
H
0
30
H
(H) (L)
Network
No.
0
30
H
0
30
H
(H) –
Request destination
module I/O No.
0
30
H
0
30
H
– (L)
0
30
H
0
30
H
(H) (L)
Request destination
module station No.
0
30
H
0
30
H
(H) (L)
Host Address
No.
0
30
H
0
30
H
(H) –
Command
0
30
H
4
34
H
– (L)
0
30
H
1
31
H
(H) –
Sub-command
0
30
H
0
30
H
(L)
0
30
H
0
30
H
– (H) –
Number of
device points
0
30
H
0
30
H
– (L)
0
30
H
2
32
H
Following
*1
*1