Mitsubishi GOT1000 Series - Page 761

19.5 Message Formats
19.5.3 Formats 1, 2 (GOT-A900 series microcomputer connection)
19 - 31
17
CONNECTION TO ALLEN-BRADLEY PLC
18
CONNECTION TO SIEMENS PLC
19
MICROCOMPUTER CONNECTION
20
CONNECTION TO OMRON TEMPERATURE CONTROLLER
21
CONNECTION TO YAMATAKE TEMPERATURE CONTROLLER
22
CONNECTION TO RKC TEMPERATURE CONTROLLER
23
CONNECTION TO FREQROL SERIES INVERTER
24
SERVO AMPLIFIER CONNECTION
3 Message format
(1) Batch read in word units (RD) command
(a) When reading a word device
The following shows an example of reading the two points of the virtual devices D100 and
D101.
(Assuming D100="0102
H" and D101="0304H" are stored.)
Item Message format
Request message
(host GOT)
Response
message during
normal
communication
(GOT host)
Response
message during
faulty
communication
(GOT host)
(format 1: GOT-A900 series microcomputer connection (format 1))
(format 2: GOT-A900 series microcomputer connection (format 2))
D100
D101
0102H
0304H
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
BC
42
H 43H
Sum
Check
(H) (L)
Command
RD
52
H 44H
(H) (L)
Address
01
30
H 31H
0
30
H
0
30
H
(H) (L)
Number of
points
02
30
H 32H
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
8D
38
H 44H
Sum
Check
(H) (L)
01
30
H 31H
0
30
H
2
32
H
(H) (L)
03
30H 33H
0
30
H
4
34
H
Data 1 (D100) Data 2 (D101)
15H
NAK
The above is a case
where the sum check error
(06
H) has occurred.
15
H
NAK
06
H
Error
code