Intesis
TM
INMBSPAN001A000
User’s Manual r1.
3 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
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4.
Modbus Interface Specification
4.1
Modbus physical layer
INMBSPAN001A000 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
General System Control
Register Address
(protocol address)
Register Address
(PLC address)
R/W Description
0
1
R/W
System On/Off
▪
0: Off
▪
1: On (Default)
1
2
R
Outdoor temperature
1,2
▪
-127..127ºC (ºC/x10ºC)
▪
-260.6..260.6ºF
2
3
R
▪
0..127ºC (ºC/x10ºC)
▪
32..260.6ºF
3
4
R
▪
0..127ºC (ºC/x10ºC)
▪
32..260.6ºF
4
5
R/W
Operating mode
▪
1: Heat
▪
2: Heat Tank
▪
3: Tank
▪
4: Cool Tank
▪
5: Cool
▪
6: Auto (Default)
R
▪
7: Auto Tank
▪
8: Auto Heat
▪
9: Auto Heat Tank
▪
10: Auto Cool
▪
11: Auto Cool Tank
5
6
R/W
Heat mode water temp. setting method
▪
1: Compensation curve
▪
2: Direct (Default)
6
7
R/W
Cool mode water temp. setting method
▪
1: Compensation curve
▪
2: Direct (Default)
1
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
2
It is not possible turn to x10 the value shown in Fahrenheit.