S&P CADB-HE BASIC Series, Руководство пользователя

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Basic characteristics of the Modbus-RTU controller
Addressing Slave: confi gurable address from 1 to 247
Diffusion Yes
Transmission speed 9600
Parity EVEN
Mode RTU
Electrical interface RS-485 2W-wired or RS232
Connector type RJ 45
MODBUS message
Address Function Data CRC verifi cation
8 bits 8 bits N x 8 bits 16 bits
The format for each byte in RTU mode is:
Code system: 8–bit binary
Bits per Byte: 1 bit of START (start)
8 data bits, the most signifi cant bit is sent the fi rst
1 bit for the parity (Even parity required)
1 bit of STOP (end)
Modbus memory map
Nº
Reg. Type of register Description Range Data Default
value R/W Comments
General confi guration
9 Coil Unit status 0 Off 1 R/W
1 Run
7 Coil Contact CLP
start/stop 0 Contact NO 0 R/W
1 Contact NC
0 Coil Fans working mode 0 VAV mode 0 R/W
1 COP mode
0 Input Register Vin 0 - 10 V R Analogic input value (V)
1 Input Register TODA -30 - 50 ºC R Outdoor Air Temperature
(Fresh air)
2 Input Register TETA -30 - 50 ºC R Extract Air Temperature
(Foul air)
3 Input Register TEHA -30 - 50 ºC R Exhaust Air Temperature
(Foul air)
4 Input Register TSUP -30 - 50 ºC R Supply Air Temperature
(Fresh air)