Formats 7 To 10 (Qna Compatible 3C/4C Frame) - Mitsubishi Electric GOT2000 Series Connection Manual

2.5.5

Formats 7 to 10 (QnA compatible 3C/4C frame)

■1. 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:
➠
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))
Frame ID
Block No.
ENQ
No.
0 0 F
05 30 30 46
H H H H
(H) (L) (H)
*1
Command
0 4
30 34
H H
(H) –
■2. Details of data items in message format
(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 1FH)
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.
➠
(3) Command, sub-command
Specifies the contents to access from the host to GOT.
The command is converted to a 4-digit ASCII code (Hex) and transmitted from the upper digit.
For details of the commands that can be used, refer to the following.
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2 - 52
2.5 Message Formats
MELSEC-Q/L MELSEC Communication Protocol Reference Manual
Network
Station No.
No.
8 0 0 0 0
38 30 30 30 30
H H H H H
(L) (H) (L) (H) (L)
Sum check is performed in this range.
Sub-command
0 1 0 0 0
30 31 30 30 30
H H H H H
– (L) (H) – –
POINT POINT POINT
QnA compatible 4C frame (format 5)
GOT cannot use the QnA compatible 4C frame (format 5).
POINT POINT POINT
Data code during communication
Communication is performed in ASCII code.
2.6.1 Setting communication interface (Controller Setting)
2.5.2 List of commands
Request destination
PLC No.
module I/O No.
0 0 0 0 0
30 30 30 30 30
H H H H H
(H) (L) (H) – –
Character A section
Device
Head Device
code
0 D * 0 0
30 44 2A 30 30
H H H H H
(L) (H) (L) (H) –
Host Address
Request destination
module station No. No.
0 0 0 0 0
30 30 30 30 30
H H H H H
(L) (H) (L) (H) (L)
Device points
0 1 0 0 0
30 31 30 30 30
H H H H H
– – – (L) (H)
Sum check
Following
B A
*1
42 41
H H
(H) (L)
0 0 2
30 30 32
H H H
– – (L)