Modbus Register Maps - Sentera Controls SPS series Mounting And Operating Instructions

Differential pressure transmitter
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SPS
DIFFERENTIAL PRESSURE
TRANSMITTER
NO T E

MODBUS REGISTER MAPS

INPUT REGISTERS
Data type
Differential
signed int.
1
pressure
unsigned int.
2
Output value
unsigned int. Actual output value: 0—100 %
Max. pressure
3
unsigned int.
limit flag
Min. pressure
4
unsigned int.
limit flag
Volume flow
rate
5
unsigned int.
Volume flow
rate high
6
Volume flow
unsigned int.
rate low
Differential
7
unsigned int.
pressure range
Diff. pressure
8
unsigned int.
response time
9-10
MIW-SPS-EN-001 - 29 / 11 / 2018
Holding register 15 (40015) defines the minimum pressure limit. The default value
is the minimum of the set range. When the measured pressure is below this value,
input register 4 ("Min Pressure Limit Flag") sets to '0', otherwise it is '1'. This
register accepts values between -100 and 2.000. When a written value is out of
this range, the register returns to its default value. The minimum value cannot be
higher than the maximum value. Therefore, when a value higher than the maximum
value is written in this register, it automatically becomes equal to the maximum
value of the range.
Holding register 16 (40016) defines the "Power-Up Timer" value. The default
value is 60 s. During this time the minimum pressure limit is not compared with
the measured pressure values and "Min Pressure Limit Flag" register remains '0'
for this period. You can change this register value only in the first 60 s after you
switch on the unit.
Holding register 17 (40017) is the "K-factor" register. You should enter the correct
K-factor of the used motor in it. The default value is '0' and the measured unit is
differential pressure, not air volume / flow rate
The registers 18—20 are not used. They are read only.
Writing on these registers does not return Modbus error exception; however, it
does not change anything either!
Description
Actual differential pressure
Flag indicates that the pressure is over
or below the max. limit
Flag indicates that the pressure is over
or below the min. limit
Actual air volume flow rate in m
3
/h
Actual air volume flow rate in m
3
/h high
word
Reserved, returns 0
Actual air volume flow rate in m
3
/h low
word
Flag indicates the current differential
pressure range
Flag indicates the current response
time
Reserved, returns 0
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Data
SPS-X-2K0
SPS-X-6K0
SPS-X-2K0
0 =
SPS-X-6K0
1 =
the value written in holding
SPS-X-2K0
2 =
register 14 is out of the
range: -100—2.000 Pa
SPS-X-2K0
0 =
SPS-X-6K0
1 =
the value written in holding
SPS-X-2K0
2 =
register 14 is out of the range
SPS-X-2K0
SPS-X-6K0
SPS-X-2K0
SPS-X-6K0
SPS-X-2K0
0—100 Pa
0 =
0 =
0—250 Pa
1 =
1 =
0—500 Pa
2 =
2 =
0—750 Pa
3 =
3 =
0—1.000 Pa
4 =
4 =
0—2.000 Pa
5 =
5 =
-50—50 Pa
6 =
6 =
-100—100
7 =
7 =
Pa
0 =
1 =
2 =
3 =
Values
-100—2.000
1.000 =
1.000 Pa
0—6.000
1.000 =
1.000 Pa
0—1.000
100 =
below the limit
over the limit
below the limit
over the limit
-100—2.000 Pa
1.000 =
1.000 m
0—44.000
0—77.000
0–77.000
1.000 =
1.000 m
SPS-X-6K0
0—1.000 Pa
0—1.500 Pa
0—2.000 Pa
0—2.500 Pa
2.000 =
2.000 Pa
0—3.000 Pa
0—4.000 Pa
0—5.000 Pa
0—6.000 Pa
0,5 s
1 s
2 s
5 s
11 - 12
10.0 %
/h
3
3
/h

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Sps-g-2k0Sps-f-6k0Sps-g-6k0Sps-f-2k0

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