Instructions
Intesis
®
Modbus RTU – Fujitsu User Manual r1.3 EN
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4 Modbus Interface Specification
Modbus physical layer
INMBSFGL001I000 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).
Modbus Registers
All registers are type “16-bit unsigned Holding Register” and they use the Modbus big endian notation.
4.2.1 Control and status registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
0
1
R/W
AC unit On/Off
▪ 0: Off
▪ 1: On
1
2
R/W
AC unit Mode
1
▪ 0: Auto
▪ 1: Heat
▪ 2: Dry
▪ 3: Fan
▪ 4: Cool
2
3
R/W
AC unit Fan Speed
1
▪ 0: Auto
▪ 1: Quiet
▪ 2: Low
▪ 3: Med
▪ 4: High
3
4
R/W
AC unit Vane Position
1
▪ 1: Position-1 (Horizontal)
▪ 2: Position-2 (Horizontal)
▪ 3: Position-3 (Medium)
▪ 4: Position-4 (Vertical)
▪ 10: Swing
4
5
R/W
AC unit Temperature Setpoint
1,2,3,4
▪ -32768 (Initialization value)
▪ 16..30 (ºC) (0 = undetermined)
▪ 61..86 (ºF) (0 = undetermined)
5
6
R
AC unit Temperature reference
1,2,3,4
▪ 18..30 (ºC) (0 = undetermined)
▪ 64,4..86 (ºF) (0 = undetermined)
▪ 0x8000 There is no temperature sent from the Remote
controller
6
7
R/W
Window Contact
▪ 0: Closed (Default)
▪ 1: Open
7
8
R/W
INMBSFGL001I000 Disablement
5
▪ 0: INMBSFGL001I000 enabled (Default value)
▪ 1: INMBSFGL001I000 disabled
8
9
R/W
AC Remote Control Disablement
5
▪ 0: Remote Control enabled (Default value)
▪ 1: Remote Control disabled
9
10
R/W
AC unit Operation Time
1
Available values will depend on the AC unit mode. Check the AC unit model functions in its user manual to know the possible values for this register.
2
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
3
It is not possible turn to x10 the value shown in Fahrenheit.
4
See section 4.2.3 CONSIDERATIONS ON TEMPERATURE REGISTERS for more information
5
This value is stored in non-volatile memory