4-157
4-4 Communication Function
4
Func
tions
BCC (Block Check Code) Calculation Method
(Example) To set "5 Hz" using command 01 (frequency reference setting) (When the target station
No. is "01")
To determine BCC, the Inverter performs ASCII conversion from the station No. to data, and calcu-
lates a result of the exclusive OR (Xor) per byte.
For the above transmission frame, BCC is calculated as follows:
(Appendix) ASCII Code Conversion Table
Text data
ASCII code
Text data
ASCII code
STX
2
A
41
ACK
6
B
42
CR
0D
C
43
NAK
15
D
44
0
30
E
45
1
31
F
46
2
32
H
48
3
33
P
50
4
34
b
62
5
35
6
36
7
37
8
38
9
39
Transmission Frame Structure
STX
Station No.
Command
Data
BCC
CR
ASCII code
(0x 02)
01
(0x 30 31)
01
(0x 30 31)
000500
(0x 30 30 30 35 30 30)
05
(0x 30 35)
(0x 00)
30
31
30
31
30
30
30
35
30
30
Xor
Xor
Xor
Xor
Xor
Xor
Xor
Xor
Xor
01
31
00
30
00
30
05
35
05 ......This value is BCC.
Summary of Contents for 3G3RX Series
Page 1: ...Cat No I560 E1 03 USER S MANUAL SYSDRIVE RXSERIES High function General purpose Inverter ...
Page 2: ......
Page 17: ...Chapter 1 Overview 1 1 Functions 1 1 1 2 Appearance and Names of Parts 1 4 ...
Page 22: ......
Page 23: ...Chapter 2 Design 2 1 Installation 2 1 2 2 Wiring 2 6 ...
Page 48: ......
Page 108: ......
Page 324: ......
Page 337: ...Chapter 6 Inspection and Maintenance 6 1 Inspection and Maintenance 6 1 ...
Page 348: ......
Page 392: ......
Page 436: ......
Page 437: ...Index ...
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