Omron VARISPEED L7 Manual page 237

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 read out at a time.
Among other things the command message must contain the start address of the first register to read out and
the quantity of registers. The response message will contain the content of the first and the consecutive num-
ber 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, error details, data link status, and
frequency references from the slave 2 Inverter.
Command Message
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.
The following table shows a message example for performing a loop back test with the slave no. 1.
Command Message
Slave address
Function code
Test Code
Data
CRC-16
86
6-
(During Normal Operation)
02H Slave Address
03H Function Code
Higher 00H
Lower 20H
1st storage
register
Higher 00H
Lower 04H
Next storage
register
Higher 45H
Lower F0H
Next storage
register
Next storage
register
CRC-16
(During Normal Operation)
01H Slave address
08H Function code
Higher 00H
Test Code
Lower 00H
Higher A5H
Data
Lower 37H
Higher DAH
CRC-16
Lower 8DH
Response Message
02H
03H
Data quantity 08H
Higher 00H
Lower 65H
Higher 00H
Lower 00H
Higher 00H
Lower 00H
Higher 01H
Lower F4H
Higher AFH
Lower 82H
Response Message
01H
08H
Higher 00H
Lower 00H
Higher A5H
Lower 37H
Higher DAH
Lower 8DH
Response Message
(During Error)
Slave Address 02H
Function Code 83H
Error code 03H
Higher F1H
CRC-16
Lower 31H
Response Message
(During Error)
Slave address 01H
Function code 89H
Error Code 01H
Higher 86H
CRC-16
Lower 50H