Jakka Control Kit 4, Руководство пользователя

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Manual
JAKKA Control Kit 4
9
www.jakkagroup.com
2.4.4 Working with Modbus
The Modbus communication goes from the Main (MN) board, MN is slave. The data goes from MN to the Remote
Control (RC) with communication protocol Senso Argus link. The RC is master and the MN is slave. The Modbus
is 8 times faster as the Senso Argus Link communication. First the data has to be send to RC and back before the
Modbus master can send the next command. Modbus does not communicate with MN after 60 seconds the RC is
going out and Modbus is no longer
master.
The figure is showing the communication between RC and MN with Modbus and Senso Argus Link. The blue line
is read communication and the red is write communication beginning with the Modbus packets. In the next
paragraphs the packets are explained.
2.4.4.1 Read Commando
The table on the right shows an example of a Read frame.

MN is receiving Read commando 03

MN asks data of Read buffer

RC sends Write module data to Read Buffer of MN
2.4.4.2 Write Commando
The table on the right shows an example of a Write frame.

MN is receiving Write commando 06

MN Write buffer receives data

MN Set write disable bit in MN Write buffer

MN Set write disable bit in MN Read buffer

RC reads MN Write buffer in Read module

RC Write module reads Buffer

RC Reset write disable bit in Write buffer

RC Write module sends to MN Read buffer

MN Reset write disable bit in MN Write buffer
The packets can be written if:

Data byte is with in the right range

The write disable bit zero is.
Bytes Description
01 # slave
03 commando
00 start addr H
00 start addr L
00 # data H
01 # data L
84 Checksum H
0A Checksum L
Bytes Description
01 # slave
06 commando
00 start addr H
00 start addr L
00 # data H
00 # data L
89 Checksum H
CA Checksum L
MODBUS
MASTER
READ
BUFFER
WRITE
WRITE
BUFFER
READ
BUFFER
ARGUS
LINK
M
F
A
N
C
F
A
N
EXHAUST
S
1 2 º
BY FI
RU
M
H
SEL
FAN TI R
D SCH O