Sentera Controls DXH-F, Mounting And Operating Instructions

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MIW-DXH-EN-001 - 02 / 10 / 2017 9 - 10
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HOLDING REGISTERS
Data type Description Data Default Values
1 Device slave address unsigned int. Modbus device address 1—247 1
2 Modbus baud rate unsigned int. Modbus communication baud rate 1—4 2
1 =
2 =
3 =
4 = 9.600
19.200
38.400
57.600
3 Modbus parity unsigned int. Parity check mode 0—2 1
0 =
1 =
2 = 8N1
8E1
8O1
4 Device type unsigned int. Device type (Read only) DXH-X = 1032
5 HW version unsigned int. Hardware version of the device (Read only) XXXX 0 x 0100 = HW version 1.10
6 FW version unsigned int. Firmware version of the device (Read only) XXXX 0 x 0140 = FW version 1.40
7 Operating mode unsigned int.
Enables the Modbus control and disables the jumpers
and trimmers
0—1 0
0 =
1 = Standalone Mode
Modbus Mode
8 Output overwrite unsigned int.
Enables the direct control over the outputs. Always
settable. Active only if holding register 7 is set to 1.
0—1 0
0 =
1 = Disabled
Enabled
9-10 Reserved, returns 0
11 Relative humidity range signed int.
Selects the relative humidity working range. Always
settable. Active only if holding register 7 is set to 1.
1—5 1
1 =
2 =
3 =
4 =
5 = 20—90 % rH
0—60 % rH
0—80 % rH
0—100 % rH
Custom
12
Minimum custom relative
humidity range
signed int.
Minimum value of the custom relative humidity range.
Always settable. Active only if holding register 7 is set
to 1 and register 11 is set to 5. 0—Max 0 200 = 20,0 % rH
13
Maximum custom relative
humidity range
signed int.
Maximum value of the custom relative humidity
range.
Always settable. Active only if holding register
7 is set to 1 and register 11 is set to 5.
Min—1.000 1.000 1.000 = 100,0 % rH
14 Setpoint signed int.
Selected setpoint for relay switching. Always
settable. Active only if holding register 7 is set to 1.
0—1.000 500 500 = 50,0 % rH
15 Hysteresis signed int.
Selected hysteresis for relay switching. Always
settable. Active only if holding register 7 is set to 1.
1—5 3
1 =
2 =
3 =
4 =
5 = 1,0 % rH
3,0 % rH
5,0 % rH
7,0 % rH
10,0 % rH
16-20 Reserved, returns 0
21
Analogue output overwrite
value
signed int.
Overwrite value for the analogue output. Always
settable. Active only if holding registers 7 and 8 are
set to 1. 0—1.000 0
0 =
1.000 =
0 %
100 %
22-30 Reserved, returns 0
If you want to find out more about Modbus over serial line, please visit: http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
VERIFICATION OF INSTALLATION INSTRUCTIONS
Check if the LEDs (LEDTX and LEDRX) blink after you switch on your unit. (See Fig. 9
Communication detection indication. ) If they do, your unit has detected Modbus
network. If they do not, check the connections again.
Fig. 9 Communication
detection indication
ATTENTION The status of both LEDs (LEDTX and LEDRX) can be checked only when the unit
is energised. Take the relevant safety measures!
DXH
DUCT HUMIDITY
SENSOR / SWITCH