Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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Communication operation and settings Parameter
6 - 210
●
Sum check code
The sum check code is 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits)
of the sum (binary) derived from the checked ASCII data.
When Pr. 123 "Waiting time setting"
≠
9999, create the communication request data without
"waiting time" in the data format. The number of characters decreases by 1.
I000039C
Fig. 6-111: Sum check code (examples)
H05
H02
H30
H30
H30
H31
H41
H37
H45 H46
H33
H31
H31
H37
H37
H44
H30
H31 H34
H30
H31
H03
0
0
E F
3
1
1
1 4
0
1 0
1
7
7
A
7
D
0
H H H H H H H H H
30 + 31 + 45 + 31 + 31 + 30 + 37 + 41 + 44
H
= F 4
H H H H H H
30 + 31 + 31 + 37 + 37 + 30
H
= 30
Example 1
Computer
→
Inverter
Example 2
Inverter
→
Computer
Binary
code
Binary
code
ASCII Code
ASCII-Code
ENQ
Station
number
Instruction
code
W
a
iting
time
Data
Sum
check
code
STX
Station
number
Data read
Sum
check
code
ETX