Fuji Electric ALPHA5 Smart, User Manual

Page: 528 / 636

CHAPTER 13 RS-485 COMMUNICATIONS
13-40
PC Loader Communications
13
13.2.3 Transmission Protocol
Order
Description
(Hexadecimal value)
Reception command
(From amplifier to host)
(1)
Start code
(2) Count of No. of pieces of data
(3) Fixed value used by system
(4)
Process status
(5)
Connection method
(6)
Amplifier station No.
Fixed value used by
system
(7)
(8)
(9)
(10)
(11)
(12)
(13)
CMND
(14)
MODE
(15)
End data
Sequence No.
Data section count
Fixed value used by system
Data section
BCC
Transmission command
(From host to amplifier)
5A
No. of pieces of data
00
FF
7A
00: Fixed
Station number of target
amplifier
11
00
FF
FF
FF
FF
As per command
00
00
01
No. of pieces of data of
data section
00
Calculated BCC
Memory type
5A
No. of pieces of data
00
7A
00: Fixed
Amplifier station No.
11
00
FF
FF
FF
FF
As per command
00
00
01
No. of pieces of data of
data section
00
Calculated BCC
00
*1: The range of calculation of the BCC is from (2) to (14).
*2: The range of counting of the number of data pieces is from (4) to (15).
Transmission format
Address (L)
Address (M)
Address (H)
No. of loaded or written
bytes
00
STR1
STR2
Memory type
Address (L)
Address (M)
Address (H)
No. of loaded or written
bytes
00
As per command
As per command