SyxthSense Ltd
Copyright © 2021 SyxthSense Ltd. All rights reserved - 03/2021
PS
MOD3.102
- 17/29
Online store:
www.syxthsense.com
Enquiries: T:
0844 840 3100
E:
NOTE: If the communication settings have been changed they are activated upon exiting the
Maintenance Mode - the device carries out a soft reset. Alternatively power cycle will activate
the new communication settings.
Parameter Storage
The configuration parameters are stored in the non-volatile memory. When the changes are carried
out via the display, the parameters are stored in the non-volatile memory when the controller returns
to a normal display mode. If the changes are carried out over the network (Modbus), then "NonVol
Update" flag is required to be forced on to save the changes. When configured via the display, when
the parameters are stored after the timeout or exit button.
Modbus Registers
The controller supports the following Modbus registers and function codes. The default
communication speed is 9600 bps, 8 data bits, Parity None and 1 Stop Bit. The default Modbus Slave
address is 1. The device Parity can be changed between Odd, None and Even. The baud rate is
selectable between 9600, 19200, 38400, 57600 and 76800 bps. The table shows the register offsets
starting from 0 (0 Base) register address. For example, the Temperature is read from Modbus register
100 using Function Code 04. Some Modbus masters will require one to be added to Modbus registers
(i.e. 1 Base). In this case Function Code 04, register 101 needs to be entered.
Version
Software Version
x.xx (Modbus/BACnet)
SYSTEM
Parameter Name
Description
Range
Register
Parameter Description
Data Type
Raw Data
Range
FUNCTION CODE 01 - READ COILS
FUNCTION CODE 05 - WRITE SINGLE COIL
FUNCTION CODE 15 - WRITE MULTIPLE COILS
100
Off Mode Override (last transition commands)
0..1
Off - On
101
ECO Mode Override (last transition commands)
0..1
Off - On
102
Show Frost Icon
0..1
Off - On
103
Boost Override (Override Boost Icon)
0..1
Off - On
FUNCTION CODE 02 - READ DISCRETE INPUTS (Add 10,000 for Modicon Addressing)
100
Digital Input Status
0..1
Off - On
101
Relay Output Status
0..1
Off - On
102
Time Clock Status (SRI-P70 Only)
0..1
Off - On
103
Light Switch Status
0..1
Off - On
104
A/C Switch Status
0..1
Off - On
105
OFF Mode Status
0..1
Off - On
106
Screen Lock Status
0..1
Off - On
107
Party Mode (Boost) Status
0..1
Off - On
108
ECO Mode Status
0..1
Off - On
109
Low Battery/Time Lost (SRI-P70 Only)
0..1
Off - On
110
Auto Fan Status (fan in auto mode)
0..1
Off - On
FUNCTION CODE 04 - READ INPUT REGISTERS (Add 30,000 for Modicon Addressing)
100
Built-In Temperature Measurement
Signed 16
-400...3020
-40.0...150.0°C
(-40.0..302.0°F)
101
Resistive Input 1 Measurement
Signed 16
-400...3020
-40.0...150.0°C
(-40.0..302.0°F)
102
Resistive Input 2 Measurement
Signed 16
-400...3020
-40.0...150.0°C
(-40.0..302.0°F)
103
Current Calculated Setpoint (°C)
Signed 16
-400...3020
-40.0...150.0°C
(-40.0..302.0°F)
104
Interface Current Mode
Unsigned 16
0..3
0 = Comfort
1 = OFF
2 = Party (Boost) Mode
105
Relative Humidity Measurement (with RH
option)
Unsigned 16
0..1000
0..100.0 %rH
106
Alarm State
Unsigned 16
0..256
Bit 0 - Internal NTC (1)
Bit 1 - RI1 (2)
Bit 2 - RI2 (4)
Bit 3 - Humidity Sensor (8)
Bit 4 - DI1 (16)
Bit 5 - DI2 (Not Applicable)
Bit 6 - Time Lost (64)
