Mitsubishi Electric FR-F820-00077 Instruction Manual page 646

(N) Operation via communication and its settings
● Sum check code
The sum check code is a 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the
sum (binary) derived from the checked ASCII data.
Fig. 5-237:
5 - 474
(Example 1)
ENQ
Inverter
Computer
ASCII Code
H05
* When the Pr. 123 or Pr. 337 (Waiting time setting) ≠"9999", create the communication request
data without "waiting time" in the data format. (The number of characters decreases by 1.)
(Example 2)
STX
Inverter Computer
ASCII Code
H02
Sum check code (examples)
Instruction
Station
code
number
0 1 E 1 1 0
H30 H31 H45 H31 H31 H30 H37 H41 H44 H46 H34
H30+H31+H45+H31+H31+H30+H37+H41+H44
= H1F4
Sum
Station
Data read
number
0 1 1 7 7 0
H30 H31 H31 H37 H37 H30 H03 H33 H30
H30+H31+H31+H37+H37+H30
= H130
Sum
Sum
check
Data
code
7 A D F 4 Binary code
Sum
ETX check
code
Binary code
3 0
Parameters
I002737E