User manual

5 Universal (General-purpose communication)
146 © Copyright Reserved Autonics Co., Ltd.
5.5.5 Exception response
It transmits function code response after set the most upper bit of function code master
transmitted as 1.
In case of reading 5 data of input register UW0000 to UW0004 with station no.5.
 Query
Station
Function
code
Start address
The number of
read register
CRC
0x05 0x04 0x00 0x00 0x00 0x05 0x31 0x8D
① ② ③ ④
⑤ ⑥ ⑦ ⑧
Item Description
①Station
Slave station is 05, 05 = (Hex)0x05
②Function code
04. It is not available code.
③Start address upper byte
0000 is a real address for 30001.
④Start address lower byte
⑤The number of read register
upper byte
⑥The number of read register
lower byte
⑦CRC lower byte
⑧CRC upper byte
 Response
Station
Function
code
Error
code
CRC
0x05 0x84 0x01 0x83 0x06
① ② ③ ④ ⑤
Item Description
①Station
Slave station is 05, 05 = (Hex)0x05
②Function code
84. The top bit is 1 in function code 04 transmitted by master.
③Error code
01. Operation function code error not supported to slave.
④CRC lower byte
⑤CRC upper byte