Modbus Interface Specification; Modbus Physical Layer; Modbus Registers; Control And Status Registers - IntesisBox DK-RC-MBS-1 User Manual

4. Modbus Interface Specification

4.1 Modbus physical layer

DK-RC-MBS-1 implements a Modbus RTU (Slave) interface, to be connected to an EIA-485 line.
It performs 8N2 communication (8 data bits, no parity and 2 stop bit) with several available
baud rates (2400 bps, 4800 bps, 9600 bps -default-, 19200 bps, 38400 bps, 57600 bps, 76800
bps and 115200 bps). It also supports 8N1 communication (8 data bits, no parity and 1 stop
bit).

4.2 Modbus Registers

All registers are type "16-bit unsigned Holding Register" and they use the standard Modbus big
endian notation.

4.2.1 Control and status registers

Register Address
(protocol address)
0
1
2
3
4
5
1 Available values will depend on the AC unit mode. Check the AC unit model functions in its user manual to know the possible v alues for
this register.
2 Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit. See section 4.2.3 for more
information.
3
It is not possible turn to x10 the value shown in Fahrenheit.
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This information is subject to change without notice
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DK-RC-MBS-1
Register Address
(PLC address)
1
2
3
4
5
6
R/W Description
AC unit On/Off
R/W
0: Off
▪
1: On
▪
AC unit Mode
0: Auto
▪
1: Heat
▪
R/W
2: Dry
▪
3: Fan
▪
4: Cool
▪
AC unit Fan Speed
1: Low
▪
R/W
2: Mid
▪
3: High
▪
AC unit Vane Position
1: Position-1 (Horizontal)
▪
2: Position-2 (Horizontal)
▪
R/W
3: Position-3 (Medium)
▪
4: Position-4 (Vertical)
▪
5: Position-5 (Vertical)
▪
10: Swing
▪
AC unit Temperature Setpoint
-32768 (Initialization value)
▪
R/W
16..31ºC (ºC/x10ºC)
▪
61..92ºF
▪
AC unit Temperature reference
-32768 (Initialization value)
▪
R
10..38ºC (ºC/x10ºC)
▪
50..100ºF
▪
URL
Email
Phone
User's Manual r3.3 EN
1
1
1
1,2,3
1,2,3
http://www.intesisbox.com
info@intesisbox.com
+34 938047134
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