Communications Functions
6-
83
Loopback
Test
(Function
Code:
08
Hex)
The
loopback test returns command messages directly as response messages without changing the contents to
check
the communications between the master and slave. You can set user-defined test code and data values.
The
following table shows a message example when performing a loopback test with the slave 1 Inverter.
Writing
to
Multiple
Storage
Registers
(Function
Code:
10
Hex)
Write
the specified data to each specified storage register from the specified addresses. The written data must
be
in the following order in the command message: Higher place 8 bits, then lower place 8 bits, in storage reg-
ister
address order.
The
following table shows an example of a message when forward operation has been set at a frequency refer-
ence
of 60.0 Hz in the slave 1 Inverter by the PLC.
Command
Message
Response
Message
(Normal
Message)
Response
Message
(Error
Message)
Slave
address
01H
Slave
address
01H
Slave
address
01H
Function
code
08H
Function
code
08H
Function
code
88H
Test
Code
Higher
place
00H
Test
Code
Higher
place
00H
Error
Code
01H
Lower
place
00H
Lower
place
00H
CRC-16
Higher
place
86H
Data
Higher
place
A5H
Data
Higher
place
A5H
Lower
place
50H
Lower
place
37H
Lower
place
37H
Note The
MSB of the function code will be
set
to 1 when an error occurs.
CRC-16
Higher
place
DAH
CRC-16
Higher
place
DAH
Lower
place
8DH
Lower
place
8DH
Command
Message
Response
Message
(Normal
Message)
Response
Message
(Error
Message)
Slave
Address
01H
Slave
Address
01H
Slave
Address
01H
Function
Code
10H
Function
Code
10H
Function
Code
90H
Start
Address
(register
number)
Higher
place
00H
Start
Address
Higher
place
00H
Error
code
02H
Lower
place
01H
Lower
place
01H
CRC-16
Higher
place
CDH
Quantity
(10H
max.)
Higher
place
00H
Quantity
Higher
place
00H
Lower
place
C1H
Lower
place
02H
Lower
place
02H
Note The
MSB of the function code will be
set
to 1 when an error occurs.
Number
of attached
data
bytes
04H
CRC-16
Higher
place
10H
Lead
data
Higher
place
00H
Lower
place
08H
Lower
place
01H
Next
data
Higher
place
02H
Lower
place
58H
CRC-16
Higher
place
63H
Lower
place
39H
Summary of Contents for SYSDRIVE 3G3RV
Page 1: ...USER S MANUAL SYSDRIVE 3G3RV High function General purpose Inverters Cat No I532 E1 1...
Page 36: ...1 22...
Page 106: ...3 14...
Page 126: ...4 20...
Page 216: ...5 90...
Page 388: ...7 26...