HD402…
- 22 -
V1.1
6
MODBUS-RTU PROTOCOL (HD402ST…)
To operate with the Modbus-RTU protocol be sure that the
dip-switch 1
(the one
closest to the terminal block) is set to
OFF
(downwards). The dip-switch can be set to
OFF even if the transmitter is powered, and the change is effective immediately.
Below is the list of registers:
TAB. 6.1: Input Registers
Address
Description
Format
3
Pressure in tenths of Pa (only HD402ST1)
16-bit integer
4
Pressure in Pa (only HD402ST1, HD402ST2 and HD402ST3)
16-bit integer
5
Pressure in daPa (only HD402ST2, HD402ST3 and HD402ST4)
16-bit integer
6
Pressure in hPa (only HD402ST3, HD402ST4 and HD402ST5)
16-bit integer
7
Pressure in kPa (only HD402ST4 and HD402ST5)
16-bit integer
8
Pressure in hundredths of mmH
2
O (only HD402ST1 and HD402ST2) 16-bit integer
9
Pressure in tenths of mmH
2
O (only HD402ST1, HD402ST2 and
HD402ST3)
16-bit integer
10
Pressure in mmH
2
O (only HD402ST2, HD402ST3 and HD402ST4)
16-bit integer
11
Pressure in thousandths of inchH
2
O (only HD402ST1 and
HD402ST2)
16-bit integer
12
Pressure in hundredths of inchH
2
O (only HD402ST2 and HD402ST3) 16-bit integer
13
Pressure in tenths of inchH
2
O (only HD402ST3, HD402ST4 and
HD402ST5)
16-bit integer
14
Pressure in inchH
2
O (only HD402ST4 and HD402ST5)
16-bit integer
15
Pressure in thousandths of mmHg (only HD402ST2)
16-bit integer
16
Pressure in hundredths of mmHg (only HD402ST2 and HD402ST3)
16-bit integer
17
Pressure in tenths of mmHg (only HD402ST3 and HD402ST4)
16-bit integer
18
Pressure in mmHg (only HD402ST4 and HD402ST5)
16-bit integer
19
Pressure in thousandths of PSI (only HD402ST3)
16-bit integer
20
Pressure in hundredths of PSI (only HD402ST3, HD402ST4 and
HD402ST5)
16-bit integer
26
Error register
16-bit integer
Reading a register not available for a particular model returns the value -32768
(0x8000).
Error register
The bits of the error register signal, if set to 1, anomalies in the measurement. The bit
0 (the less significant one) indicates a measurement over-range of the transmitter.
The bit 1 indicates whether the measurement is less than the minimum measurable
(under-range). The bits 2 and 3 indicate sensor errors.
Содержание DeltaOhm HD402 Series
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Страница 26: ...HD402 26 V1 1 NOTES ...
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