Air Handling Unit Interface
AHU-KIT-SP
MORIKAWA
SPECIFICATION
PSZ000Z308
21/38
MODEL NAME
MODEL TYPE
ISSUE
CLASSIFICATION
DWG NO.
REV.MARK PAGE
21.09.17
Field
Detail
Data length
Address
Slave address
8 bit
Function
Function code
8 bit
Data
Request data
Variable
Error check
CRC error check
16 bit
Field
Detail
Data length
Address
Slave address
8 bit
Function
Function code
8 bit
Data
Respons data
Variable
Error check
CRC error check
16 bit
●Overview of Modbus communication
・
The time from the completion of the request to the start of the response and the time from the completion of the response to the start of the next request are as shown in the figure below.
・
The following table shows the data length of the request frame.
・
The data length of the response frame is shown in the table below.
External controller
(Modbus
-
master)
AHU Interface
(Modbus
-
slave)
Request
Request
Response
