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MIW-RSTHX-2-EN-000 - 15 / 02 / 2018
10 - 11
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
0—6
2
0 =
1 =
2 =
3 =
4 =
5 =
6 =
4.800
9.600
19.200
38.400
57.600
115.200
230.400
3
Modbus parity mode
unsigned int.
Parity check mode
0—2
1
0 =
1 =
2 =
8N1
8E1
8O1
4
Device type
unsigned int.
Device type
(Read only)
RSTHX-2= 1093
5
HW version
unsigned int.
Hardware version of the device
(Read only)
XXXX
0x0100 =
HW version 1.00
6
FW version
unsigned int.
Firmware version of the device
(Read only)
XXXX
0x0100 =
FW version 1.00
7
Reserved, returns “0”
8
Output 1 overwrite (T)
unsigned int.
Enables the direct control over the temperature output.
0—1
0
0 =
1 =
Disabled
Enabled
9
Output 2 overwrite (rH)
unsigned int.
Enables the direct control over the rH output
0—1
0
0 =
1 =
Disabled
Enabled
10
Reserved, returns “0”
11
Output 1 type (T)
unsigned int.
Select analog / digital output type
1—3
1
1 =
2 =
3 =
1—10 VDC
0—20 mA
PWM
12
Output 2 type (rH)
unsigned int.
Select analog / digital output type
1—3
1
1 =
2 =
3 =
1—10 VDC
0—20 mA
PWM
13
Reserved, returns “0”
14
Minimum temperature
range
unsigned int.
Minimum value of the temperature range; cannot be set
higher than max. temperature range minus 5
º
C
0 — (Max. range — 50)
0
100 =
10,0 °C
15
Maximum temperature
range
unsigned int.
Maximum value of temperature range; cannot be set lower
than min. temperature range plus 5
º
C
(Min. range + 50) – 500
500
500 =
50,0 °C
16
Minimum relative humidity
range
unsigned int.
Minimum value of the rH range; cannot be set higher
than max. rH range minus 5
%
50 — (Max. range — 50)
50
200 =
20,0 % rH
17
Maximum relative humidity
range
unsigned int.
Maximum value of rH range; cannot be set lower than
min. rH range plus 5%
(Min. range + 50) – 850
850
850=
85,0 % rH
18—19
Reserved, return “0”
20
Minimum temperature
alert
unsigned int.
Minimum temperature alarm value
Min. temperature range — Max.
temperature alarm
0
100 =
10,0
º
C
21
Maximum temperature
alert
unsigned int.
Maximum temperature alarm value
Min. temperature alarm — Max.
temperature range
500
500 =
50,0
º
C
22
Minimum relative humidity
alert
unsigned int.
Minimum relative humidity alarm value
Min. relative humidity range —
Max. relative humidity alarm
50
200 =
20,0 % rH
23
Maximum relative
humidity alert
unsigned int.
Maximum relative humidity alarm value
Min. relative humidity alarm —Max.
relative humidity range
850
850 =
85,0 % rH
24—25
Reserved, return “0”
26
LED indication
unsigned int.
LED indication related to one of the parameters
1—3
1
1 =
2 =
temperature
rH
27
Internal voltage source
selection Output 1 (T)
unsigned int.
Selection of internal voltage source for PWM output 1
0—1
0
0 =
1 =
3,3 VDC
12 VDC
28
Internal voltage source
selection Output 2 (rH)
unsigned int.
Selection of internal voltage source for PWM output 2
0—1
0
0 =
1 =
3,3 VDC
12 VDC
29
Reserved, return “0”
30
Modbus network resistor
termination (NBT)
unsigned int.
Set device as ending the line or not by connecting NBT
0—1
0
0 =
1 =
NBT disconnected
NBT connected
31
Output 1 overwrite
value (T)
unsigned int.
Overwrite value for output 1. Active only if Holding
register 8 is set to 1
0—1.000
0
0 =
1.000 =
0 %
100 %
32
Output 2 overwrite value
(rH)
unsigned int.
Overwrite value for output 2. Active only if Holding
register 9 is set to 1
0—1.000
0
0 =
1.000 =
0 %
100 %
33
Reserved, returns “0”
34
Active light level
unsigned int.
The ambient light level above which ‘Active’ is indicated
in input register 6
0—32.000
100
1.000 =
1.000 lx
35
Standby light level
unsigned int.
The ambient light level below which ‘Standby’ is
indicated in input register 6
0—32.000
10
10 =
10 lx
36
Modbus registers reset
unsigned int.
Resets Modbus Holding registers to default values.
When finished this register is automatically reset to ‘0’
0—1
0
0 =
1 =
Idle
Reset Modbus
registers
37—40
Reserved, return “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
RSTHX-2
COMBINED TEMPERATURE AND RELATIVE
HUMIDITY ROOM TRANSMITTER
