Omron VARISPEED F7 User Manual page 271

MEMOBUS Message Example
An example of MEMOBUS command/response messages is given below.
Reading Inverter Memory Register Contents
The content of maximum 16 inverter memory registers can be readout at a time.
Among other things the command message must contain the start address of the first register that is to be read
out and the quantity of registers that should be read out. The response message will contain the content of the
first and the consecutive number of registers that has been set for the quantity.
The contents of the memory register are separated into higher 8 bits and lower 8 bits.
The following tables show message examples when reading status signals, fault details, data link status, and
frequency references from the slave 2 Inverter.
Slave Address
Function Code
Start Address
Quantity
CRC-16
6
Loop back Test
The loop back 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 loop back test with the slave no. 1.
Slave address
Function code
Test Code
Data
CRC-16
88
6-
Command Message
02H Slave Address
03H Function Code
Higher 00H
Lower 20H
Higher 00H
Lower 04H
Higher 45H
Lower F0H
Command Message
01H Slave address
08H Function code
Higher 00H
Lower 00H
Higher A5H
Lower 37H
Higher DAH
Lower 8DH
Response Message
(During Normal Operation)
02H
03H
Data quantity 08H
Higher 00H
1st storage
register
Lower 65H
Higher 00H
Next storage
register
Lower 00H
Higher 00H
Next storage
register
Lower 00H
Higher 01H
Next storage
register
Lower F4H
Higher AFH
CRC-16
Lower 82H
Response Message
(During Normal Operation)
01H
08H
Higher 00H
Test Code
Lower 00H
Higher A5H
Data
Lower 37H
Higher DAH
CRC-16
Lower 8DH
Response Message
(During Fault)
Slave Address 02H
Function Code 83H
Fault code 03H
Higher F1H
CRC-16
Lower 31H
Response Message
(During Fault)
Slave address 01H
Function code 89H
Fault Code 01H
Higher 86H
CRC-16
Lower 50H