User manual

5 Universal (General-purpose communication)
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(4) Preset Multiple Registers(Func16-10H)
Slave
Address
(station)
Function
(command)
Starting Address
(starting address)
No. of Register
(the number of
register)
Error Check
(CRC16)
Hi(upper) Lo(lower) Hi(upper) Lo(lower) Lo(lower) Hi(upper)
1Byte 1Byte 1Byte 1Byte
1Byte 1Byte 1Byte 1Byte
5.4.3.3 Error
Station Function code Error code
CRC
L H
① ② ③ ④
Item Description
①Station
It is slave station (HEX) for confirmation about Query.
②Function code (HEX)
It is transmitted when Slave cannot process requirement of Master. It
transmits after set the most upper bit of function code Master transmitted
as 1.
③Error code
※1
(HEX)
Transmits the specific error code.
④CRC(HEX)
It is error check area. It calculates using CRC-16 code.
It consists of 2btye. (Lower 1byte of CRC) + (Upper 1byte of CRC).
※Error code value
Code
Name
Description
01 Negative function
Operation function code not supported
to slave
02 Negative function Address not existing in slave
03 Negative data Data which cannot be written in slave