Exception Response - Omron JX User Manual

Query
No. Field name
*1
1 Slave address
2 Function code
3 Start address (MSB)
4 Start address (LSB)
Number of holding
5
registers (MSB)
Number of holding
6
registers (LSB)
*2
7 Number of bytes
8 Change data 1 (MSB)
9 Change data 1 (LSB)
10 Change data 2 (MSB)
11 Change data 2 (LSB)
12 CRC-16 (MSB)
13 CRC-16 (LSB)
*1.There is no response for broadcasting.
*2.Specify the number of bytes to be changed, not the number of holding registers.
*3.Note that the holding register start address is "1013h", which is smaller by 1 than the register
number "1014h".
Refer to "<Exception Response>" below if writing into the multiple holding registers cannot be
performed normally.
<Exception Response>
The master requires a response for a query except for broadcasting. Though the Inverter should
return a response corresponding with the query, it returns an exception response if the query has
an error.
The exception response has a field configuration shown in the following table.
Field Configuration
Slave address
Function code
Exception code
CRC-16
The detailed field configuration is shown on the next page. The function code of the exception re-
sponse is the value of the query function code with 80h added. The exception code shows the cause
of exception response.
Example
(HEX)
08
10
*3
10
*3
13
00
02
04
00
04
93
E0
7D
53
4-2 Function Mode
Response
No. Field name
1 Slave address
2 Function code
3 Start address (MSB)
4 Start address (LSB)
Number of holding
5
registers (MSB)
Number of holding
6
registers (LSB)
7 CRC-16 (MSB)
8 CRC-16 (LSB)
Example
(HEX)
08
10
10
13
00
4
02
B4
54
4-75