Communications Protocol
Append
ix
B
B–6
Command – 00
The 00 command controls the Forward, Reverse and Stop mode of the inverter. You must set
parameter A002=03 in order for serial communications control of the inverter to apply.
The frame format of command 00 follows the
timing diagram and specification table.
The example below shows a transmission to the inverter at address Node 1 to rotate the motor
in the forward direction.
Command – 01
The 01 command sets the output frequency for the standard profile. You must set parameter
A002=03 in order for serial communications control of the inverter to apply.
The frame format of command 01 follows the
timing diagram and specification table.
The example below shows a transmission to the inverter at address Node 1 to set the output
frequency for 5 Hz. We use a value of 500 in ASCII to represent 5.00 Hz.
Element
Description
Size
Value
STX
Control code (STart of TeXt)
1 byte
STX (0x02)
Node
Node (station) address of inverter
2 bytes 01 to 32, and FF (broadcast to all
nodes)
Command
Transmission command
2 bytes 00
Data
Transmission data
1 byte
00 = Stop command
01 = Forward command
02 = Reverse command
BCC
Block check sum code
2 bytes Exclusive OR of Node,
Command, and Data
[CR]
Control code (carriage return)
1 byte
[CR] (0x0D)
STX Node
Command
Data
BCC [CR]
Frame format
(STX) | 01 | 00 | 1 | (BCC) | [CR]
to ASCII
02 | 30 31 | 30 30 | 31 | 33 30 | 0D
Element
Description
Size
Value
STX
Control code (STart of TeXt)
1 byte
STX (0x02)
Node
Node (station) address of inverter
2 bytes 01 to 32, and FF (broadcast to all
nodes)
Command
Transmission command
2 bytes 01
Data
Transmission data
6 bytes ASCII code for ten times the
frequency (accommodates two
decimal places)
BCC
Block check sum code
2 bytes Exclusive OR of Node,
Command, and Data
[CR]
Control code (carriage return)
1 byte
[CR] (0x0D)
STX Node
Command
Data
BCC [CR]
Frame format
(STX) | 01 | 01 | 000500 | (BCC) | [CR]
to ASCII
02 | 30 31 | 30 31 | 30 30 30 35 30 30 | 30 35 | 0D
Содержание SJ300 Series
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