Mitsubishi GOT1000 Series Connection Manual page 760

(6) Data
Specifies data to read from/write to the specified device data. (word unit)
Data notated in Hex is converted to a 4-digit ASCII code (Hex) and transmitted from the upper digit.
(7) Error code
This is the response message at faulty communication appended with error contents.
Error code is transmitted in 1 byte.
For details of the error codes generated in format 2 (GOT-A900 series microcomputer connection
(format 2)), refer to the following:
(8) Sum check code
The sum check code is obtained by converting the lower 1 byte (8 bits) of the result (sum), after
having added the sum check target data as binary data, to 2-digit ASCII code (Hex).
19 - 30
19.5 Message Formats
19.5.3 Formats 1, 2 (GOT-A900 series microcomputer connection)
Error code list
STX Command Address
R D 0 1
02 52 44 30 31
H H H H H
(H) (L) (H)
Sum check is performed in this range.
52 + 44 + 30 + 31 + 30
H H H H
Number of
ETX
points
0 0 0 2
30 30 30 32 03
H H H H H
(L) (H) (L)
+ 30 + 30 + 32 + 03 = 1BC
H H H H H H
Sum
Check
B C
42 43
H H
(H) (L)