Delta OHM HD2013.3 User manual

Operating manual
Precipitation detector
HD2013.3
www.deltaohm.com
English
Keep for future reference.

HD2013.3 - 2 - V1.7
TABLE OF CONTENTS
1 INTRODUCTION ........................................................................................ 3
2 TECHNICAL SPECIFICATIONS ...................................................................
3 INSTALLATION ......................................................................................... 6
3.1 ELECTRICAL CONNECTIONS .......................................................................... 6
CONFIGURATION AND MEASUREMENT ..................................................... 9
5 PROPRIETARY PROTOCOL ...................................................................... 10
6 MODBUS-RTU PROTOCOL ........................................................................ 17
7 MAINTENANCE ........................................................................................ 21
8 SAFETY INSTRUCTIONS .......................................................................... 21
9 ORDERING CODES .................................................................................. 22

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1 INTRODUCTION
HD2013.3 is a precipitatio detector based o the capacitive pri ciple. The capacity
value of the se sitive eleme t cha ges accordi g to the surface dampe ed by
rai drops.
A i tegrated heater keeps the detector dry, evaporates water a d preve ts false sig-
als caused by fog or dew. The heater also activates at low temperatures, melti g the
s ow a d allowi g detecti g s ow precipitatio s by usi g a ambie t temperature
se sor.
The i strume t exter al circular dome acts as a wi dshield for the se sor, preve ti g
false i dicatio s.
A auto-calibratio algorithm compe sates for variatio s i the respo se due to the
dirt that ca accumulate o the se sitive surface.
The i strume t has a digital RS485 output with MODBUS-RTU or proprietary protocol,
a 0/4…20 mA (0…10 V on request when ordering) a alog output a d a voltage-free
co tact output. The co tact output is activated whe the se sor detects a precipita-
tio i progress.
The detector has IP68 protectio degree.
Supplied with fixi g bracket for ∅ 30…50 mm mast.
Optio al bird spikes (to be requested whe orderi g the detector) ca be mou ted.

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2TECHNICAL SPECIFICATIONS
Precipitation sensor
Type Capacitive, with i tegrated heater
Dime sio s 6.6 cm2
A gle 30°
Se sitive area 0.05 cm2 mi .
Temperature sensor NTC 10KΩ @ 25 °C
Measuring range
Precipitatio detectio ON / OFF (precipitatio i progress / o precipitatio )
Perce tage of dry se sitive surface of the se sor
Temperature -40…+60 °C
Resolution
Precipitatio detectio Co figurable 1 % (default) or 0.1 % of dry se sitive surface
of the se sor
Temperature 0.1 °C
Output RS485 ot isolated, with MODBUS-RTU or proprietary protocol
A alog 0/4…20 mA (RLmax = 500 Ω) or o request
0…10 V
(RLmi = 10 kΩ)
Voltage-free ormally ope co tact
max. 200 mA @ 30 Vdc
resistive load
Power supply 12…30 Vdc
Consumption With heati g OFF: 18 mA @24 Vdc
With heati g ON: 230 mA max @24 Vdc
The i dicated co sumptio does ot i clude the co sumptio
due to the a alog output
Connection 8-pole circular co ector
Operating conditions -40…+60 °C / 0…100 %RH
Storage temperature -40…+60 °C
Dimensions ∅ 70 x 70 mm (o ly the i strume t without mou ti g bracket)
Weight 450 g approx.
Protection degree IP 68
Housing material Tech opolymer ASA

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Fig. 2.1: dimensions (mm)
Bird spikes (option
a
l)
Bracket

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3INSTALLATION
Use the supplied accessories to mou t the i strume t. The bracket ca be fixed to a ∅
30…50 mm mast, both vertical a d horizo tal, tha ks to the double drilli g o the
bracket.
Fig. 3.1: installation on vertical mast
Place the detector far from buildi gs, trees, etc…, taki g care that the space above is
free from a y object that could obstruct the detectio of the precipitatio . Keep the
se sor clea .
3.1 ELECTRICAL CONNECTIONS
The i strume t has a 8-pole circular co ector a d uses the CP2013.2... optional ca-
bles, with 8-pole co ector o o e side a d ope wires o the other side.
Fig. 3.2: connectors pinout
HD2013.3
Bracket
Mast
Connector
Screws for fixing the
detector to the bracket
Ring for fixing the
bracket to the mast
Co ector refere ce
I strume t male
co ector (exter al view)
Cable female co ector
(exter al view)

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Connector Function Wire color
CP2013.2… cable
1 Voltage-free co tact Gree
2 Power supply positive (+Vdc) Red
3 RS485 B/+ White
4 Voltage-free co tact Blue
5 RS485 A/- Brow
6 A alog output positive Yellow
7 Power supply egative (GND) Grey
8 Serial grou d Black
To e sure a good oise immu ity, it is recomme ded to co ect the cable shield to
grou d (GND).
RS 85 connection:
By default, the i strume t has MODBUS address 1 a d commu icatio parameters
19200, 8E1. Differe t parameters ca be set usi g the proprietary protocol or the
MODBUS-RTU protocol.
Fig. 3.3: RS 85 connection
Current analog output:
By default, the curre t a alog output is 4…20 mA, with:
4 mA = se sor se sitive surface completely wet
20 mA = se sor se sitive surface completely dry
With the comma ds of the proprietary protocol it is possible to set the ra ge 0…20 mA
for the output a d reverse the directio of the output, so that whe the se sor se si-
tive surface is completely wet the output is 20 mA.
I case of measureme t error, the output goes to 22 mA.
Power supply
12…30 Vdc
Red
Grey
Brow
White
CP2013.2… cable
PLC, data logger or
RS485/USB or RS485/RS232
co verter for PC
Other se sors with
RS485 output
Termi atio Termi atio

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Fig. 3. : current analog output connection
Voltage analog output (optional):
By default, the voltage a alog output is 0…10 V, with:
0 V = se sor se sitive surface completely wet
10 V = se sor se sitive surface completely dry
With the comma ds of the proprietary protocol it is possible to set the ra ge 2…10 V
for the output a d reverse the directio of the output, so that whe the se sor se si-
tive surface is completely wet the output is 10 V.
I case of measureme t error, the output goes to 11 V.
Fig. 3.5: voltage analog output connection
Contact output:
There is a ormally ope voltage-free co tact betwee pi s 1 a d 4 of the co ector
(gree a d blue wires of the optio al CP2013.2… cable). The co tact closes whe the
se sor detects a precipitatio i progress.
Power supply 12…30 Vdc
CP2013.2… cable
Red
Grey
Yellow
Power supply 12…30 Vdc
CP2013.2… cable
Red
Grey
Yellow RLmi = 10 kΩ
RLmax = 500 Ω

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CONFIGURATION AND MEASUREMENT
The co figuratio of the i strume t a d the readi g of the measureme ts ca be do e
via the RS485 serial output, both with the proprietary protocol a d with the MODBUS-
RTU protocol.
I the first 10 seco ds after the i strume t power o , it is always active the proprie-
tary protocol. After 10 seco ds from power o , the operati g protocol is activated,
which by default is the MODBUS-RTU protocol.
It is possible to keep the proprietary protocol active eve after 10 seco ds from power o
by se di g, before the 10 seco ds expire, the comma d @ of the proprietary protocol.
The proprietary protocol ca be set as operati g protocol by mea s of the CP0 comma d.
The comma ds of the proprietary protocol a d the registers of the MODBUS-RTU pro-
tocol are described i detail i the followi g chapters.
Precipitation measurement:
To determi e if a precipitatio is i progress, the i strume t detects the perce tage of
dry se sitive surface of the se sor:
100% = se sitive surface of the se sor completely dry
0% = se sitive surface of the se sor completely wet
Whe the perce tage of dry se sitive surface of the se sor falls below a co figurable
threshold value (default 95%), the i strume t i dicates that a precipitatio is i pro-
gress. The threshold value ca be modified with the comma d CRT of the proprie-
tary protocol or by usi g the MODBUS holdi g register with address 5.
The i dicatio of precipitatio i progress ceases whe the perce tage of dry se sitive
surface of the se sor rises above the threshold plus a co figurable hysteresis value
(default 2%) a d after a co figurable delay time (default 2 mi utes).
The resolutio with which the perce tage of dry se sitive surface of the se sor is de-
tected is 1% by default. The resolutio ca be set to 0.1% with the comma d CRLR
of the proprietary protocol or by usi g the MODBUS holdi g register with address 16.
The i strume t discrimi ates betwee rai fall a d s owfall based o the measured
ambie t temperature. If the ambie t temperature is lower tha a co figurable refer-
e ce temperature (default 2 °C), the precipitatio is co sidered s owy.
The detectio se sitivity ca be adjusted with the comma d DRS of the proprietary
protocol or by usi g the MODBUS holdi g register with address 20.
Automatic calibration of the precipitation sensor:
The i strume t ca be set so as the precipitatio se sor calibratio is automatically
performed at regular i tervals; this allows compe sati g for a y drift of the se sor
due to temperature cha ges, agi g a d dirt deposited o the se sitive surface.
The correctio applied by each automatic calibratio is limited to a maximum value
(co figurable), so as to avoid erro eous calibratio s whe the detected value differs too
much from the estimated value.
By default, the automatic calibratio is e abled, with 30 mi utes i terval a d 0.1%
maximum correctio . I order to cha ge the automatic calibratio setti gs, see the
chapters o the proprietary protocol a d MODBUS-RTU protocol.

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5PROPRIETARY PROTOCOL
To use the proprietary protocol, it is ecessary to co ect the i strume t to the PC via
a RS485/USB (e.g. RS51K) or RS485/RS232 co verter a d use a sta dard serial
commu icatio program. I the serial commu icatio program, set the COM port
umber to which the i strume t is co ected a d the commu icatio parameters as
follows:
•If the MODBUS-RTU protocol is set as the operati g protocol i the i strume t
(default), set the Baud Rate 57600 a d the parameters 8N2 i the serial commu-
icatio program, the power cycle the i strume t a d se d the comma d @
withi 10 seco ds from the i strume t power o .
•If the proprietary protocol is already set as the operati g protocol i the i stru-
me t, it is possible to operate with Baud Rate 57600 a d parameters 8N2 by
se di g the comma d @ withi 10 seco ds from the i strume t power o , or
you ca let the 10 seco ds pass without se di g the comma d @ a d operate
with the commu icatio parameters set i the i strume t (default 19200, 8E1).
To cha ge the i strume t co figuratio , the serial comma d CAL USER ON must be
se t first (the i strume t replies with USER CAL MODE ON). The comma d CAL USER ON
is automatically disabled after a few mi utes of i activity. If the setti gs should be o ly
read, the comma d CAL USER ON is ot required.
Below is the list of the serial comma ds.
Instrument information:
Command Reply Description
G0 Model I strume t model
G1 &Revision| I strume t hardware revisio
G2 SN= I strume t serial umber
G3 Firm.Ver.=x.y I strume t firmware revisio
G4 Firm.Date=yyyy/mm/dd Date of firmware revisio
GC Fact.Calib.Date= yyyy/mm/dd Date of factory calibratio
Protocol:
Command Reply Description
@ &| Keeps the proprietary protocol operatio al eve after 10
seco ds from i strume t power o . It must be se t withi
10 seco ds from i strume t power o .
CP &| Sets the operati g protocol:
Proprietary if =0
MODBUS-RTU if =1
Default : MODBUS-RTU ( =1)
RP & | Reads the operati g protocol set i the i strume t.
SM &| Activates the MODBUS-RTU protocol immediately.
CMA &| Sets the i strume t address for the MODBUS-RTU pro-
tocol to .
The address should ra ge withi 1 a d 247.
Default : 1
RMA & | Reads the i strume t address for the MODBUS-RTU pro-
tocol.
Note: after se di g the CP1 comma d, the i strume t remai s with the proprietary protocol.
Se d the comma d SM to activate the MODBUS-RTU protocol immediately, or power cycle the

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i strume t.
RS 85 communication parameters:
Command Reply Description
CMB &| Sets the Baud Rate:
1200 if =0
2400 if =1
4800 if =2
9600 if =3
19200 if =4
38400 if =5
57600 if =6
115200 if =7
Default : 19200 ( =4)
RMB & | Reads Baud Rate setti g
CMP &| Sets parity a d stop bits:
8N1 if =0 [No parity, 1 stop bit]
8N2 if =1 [No parity, 2 stop bits]
8E1 if =2 [Eve parity, 1 stop bit]
8E2 if =3 [Eve parity, 2 stop bits]
8O1 if =4 [Odd parity, 1 stop bit]
8O2 if =5 [Odd parity, 2 stop bits]
The umber of data bits is fixed to 8.
Default : 8E1 ( =2)
RMP & | Reads the setti g of parity a d stop bits.
CMW &| Sets waiti g time after tra smissio with MODBUS-RTU
protocol:
Immediate receptio if =0 (violates protocol)
Waiti g 3.5 characters if =1 (respects protocol)
Default : Immediate receptio ( =0)
RMW & | Reads the setti g of waiti g time after tra smissio with
MODBUS-RTU protocol.
Precipitation detection settings:
Command Reply Description
CRLR &| Sets the resolutio with which the perce tage of dry
se sitive surface of the se sor is detected:
1% if =0
0.1% if =1
Default : 1% ( =0)
RRLR & | Reads the resolutio with which the perce tage of dry
se sitive surface of the se sor is detected.
CRT &| Sets the precipitatio detectio threshold to value,
where is the perce tage of dry se sitive surface of the
se sor below which the i strume t i dicates that a pre-
cipitatio is i progress.
If the 0.1% resolutio is set, the value must be ex-
pressed i te ths (for example, write 970 to i dicate
97.0%).
Default : 97 (=97% with 1% default resolutio )
RRT & | Reads the setti g of the precipitatio detectio thresh-
old.

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Command Reply Description
CRH &| Sets the hysteresis of the precipitatio detectio thresh-
old to value.
The value should ra ge withi 0 a d 20%.
If the 0.1% resolutio is set, the value must be ex-
pressed i te ths (for example, write 10 to i dicate
1.0%).
Default : 1 (=1% with 1% default resolutio )
RRH & | Reads the setti g of the hysteresis of the precipitatio
detectio threshold.
CST &| Sets the refere ce temperature to discrimi ate betwee
rai fall a d s owfall to value expressed i te ths of °C.
The value should ra ge withi -50 (=-5 .0 °C) a d 50
(=+5.0 °C).
Default : 20 (=+2.0 °C)
RST & | Reads the setti g of the refere ce temperature to dis-
crimi ate betwee rai fall a d s owfall.
CSH &| Sets the hysteresis of the refere ce temperature to dis-
crimi ate betwee rai fall a d s owfall to value ex-
pressed i te ths of °C.
The value should ra ge withi -5 (=-0 ,5 °C) a d 5
(=+0,5 °C).
Default : 5 (=+0,5 °C)
RSH & | Reads the setti g of the hysteresis of the refere ce tem-
perature to discrimi ate betwee rai fall a d s owfall.
CRAD &| Sets the delay i i dicati g the begi i g of a precipita-
tio , both rai y a d s owy, to seco ds (0…32767 s).
The i dicatio of precipitatio i progress is ge erated
o ly if the precipitatio lasts lo ger tha the set time.
Default: 0
RRAD & | Reads the setti g of the delay i i dicati g the begi i g
a precipitatio .
CRAB &| Sets the delay i i dicati g the e d of a precipitatio ,
both rai y a d s owy, to seco ds (0…32767 s).
The i dicatio of precipitatio i progress ceases o ly af-
ter the set time has elapsed from the e d of the precipita-
tio .
Default: 120
RRAB & | Reads the setti g of the delay i i dicati g the e d of a
precipitatio .
CTAD &| Sets the delay i i dicati g the tra sitio from rai fall to
s owfall, whe the temperature dops below the refere ce
temperature, to seco ds (0…32767 s).
Default: 0
RTAD & | Reads the setti g of the delay i i dicati g the tra sitio
from rai fall to s owfall, whe the temperature dops be-
low the refere ce temperature.

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Command Reply Description
CTAB &| Sets the delay i i dicati g the tra sitio from s owfall
to rai fall, whe the temperature rises above the refer-
e ce temperature plus the hysteresis, to seco ds
(0…32767 s).
Default: 0
RTAB & | Reads the setti g of the delay i i dicati g the tra sitio
from s owfall to rai fall, whe the temperature rises
above the refere ce temperature plus the hysteresis.
DRS &| Sets the se sitivity of the precipitatio detectio to
value (10…1000). The greater the value, the greater
the se sitivity.
Default : 100
GRS & | Reads the setti g of the se sitivity of the precipitatio
detectio .
Contact output:
Command Reply Description
CRS &| Sets the co tact output activatio mode:
Output disabled if =0
Output activated i case of rai fall if =1
Output activated i case of s owfall if =2
Note: the precipitatio is co sidered a rai fall if the
measured temperature is higher tha the refere ce
temperature, a d a s owfall if the measured tempera-
ture is lower tha the refere ce temperature.
Default : Output activated i case of rai fall ( =1)
RRS & | Reads the setti g of the co tact output activatio mode.
Analog output:
Command Reply Description
CAOE &| Adds the offset to the a alog output: 4…20 mA or 2…10 V.
CAOD &| Remove the offset from the a alog output: 0…20 mA or
0…10 V.
CAOR & | Reads the setti g of the offset for the a alog output:
Without offset if =0 (default for voltage output)
With offset if =1 (default for current output)
CASE &| Sets the followi g correspo de ce for the a alog output:
4 mA / 0 V  100% of dry se sitive surface
20 mA / 10 V  0% of dry se sitive surface
CASD &| Sets the followi g correspo de ce for the a alog output:
4 mA / 0 V  0% of dry se sitive surface
20 mA / 10 V  100% of dry se sitive surface
CASR & | Reads the setti g of the correspo de ce betwee a alog
output a d perce tage of dry se sitive surface:
4…20 mA / 0…10 V  0…100% if =0 (default)
4…20 mA / 0…10 V  100…0% if =1

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Units of measurement:
Command Reply Description
TT &| Sets the temperature u it of measureme t:
°C if =0
°F if =1
Default : °C ( =0)
HH & | Reads the setti g of the temperature u it of measure-
me t.
Reading of the measurement information:
Command Reply Description
S0 &| Disable the se di g of the measureme t i for-
matio .
S1 &| E able the se di g of the measureme t i for-
matio at regular i tervals.
To set the se di g i terval, use the comma d MT.
For the mea i g of the i formatio se t by the
i strume t, see the comma d S2.
S2 & RAIN_RAW
RAIN_LEVEL
RAIN_STATUS
RAIN_VALIDITY
PRECIPITATION_TYPE
AMB_TEMP VOLTAGE
HEATER_TEMP
MICRO_TEMP
HEATER_MODE
HEATER_PERCENTAGE|
Pri ts the list of the measureme t i formatio
se t by the i strume t:
RAIN_RAW = umber of 12-bit ADC cou ts,
proportio al to the perce tage of dry se sitive
surface of the se sor
RAIN_LEVEL = perce tage of dry se sitive surface
of the se sor
RAIN_STATUS = i dicatio of o precipitatio (0)
or precipitatio i progress (1)
RAIN_VALIDITY = validity of the precipitatio
i dicatio (0= o, 1=yes)
PRECIPITATION_TYPE = i dicatio of the type of
precipitatio (0=rai fall, 1=s owfall)
AMB_TEMP = ambie t temperature
VOLTAGE = power supply voltage
HEATER_TEMP = heater temperature
MICRO_TEMP = i ter al board temperature
HEATER_MODE = heati g operati g mode
HEATER_PERCENTAGE = perce tage of heati g
power used
MT &| Sets the i terval for se di g the measureme t i -
formatio to seco ds (1…30 s).
Default: 1
NT & | Reads the setti g of the i terval for se di g the
measureme t i formatio .

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Heating:
Command Reply Description
CHM &| Sets the heati g operati g mode:
Ma ual if =0
Always o if =1
Always off if =2
Automatic if =3
If the ma ual mode is set, the heati g power set with
the comma d CHP is used.
Default : Automatic ( =3)
RHM & | Reads the setti g of the heati g operati g mode.
CHP &| Sets the heati g power for the ma ual operati g mode
to value, as a perce tage of the maximum power
(0…100%)
Default : 50 (=50% of the maximum power)
RHP & | Reads the setti g of the heati g power for the ma ual
operati g mode.
Advanced functions:
Command Reply Description
DFLT &| Restores the factory co figuratio .
CU4 &| Calibrates the i strume t.
Se d the comma d o ly if the se sor se sitive surface
is completely dry.
CRBS &| E able/disable the precipitatio se sor automatic cali-
bratio at regular i tervals:
Disable if =0
E able if =1
Default : Automatic calibratio e abled
RRBS & | Reads the e abli g status of the precipitatio se sor au-
tomatic calibratio .
CRBT &| Sets the time i terval betwee two co secutive precipi-
tatio se sor automatic calibratio s to seco ds
(300…64800 s).
Default: 1200 (=20 mi utes)
RRBT & | Reads the setti g of the time i terval betwee two co -
secutive precipitatio se sor automatic calibratio s.
CRBMC &| Sets the maximum correctio that ca be applied by each
precipitatio se sor automatic calibratio to value ex-
pressed i te ths of %.
The value should ra ge withi 1 (=0.1%) a d 200
(=20.0%).
Default: 4 (=0.4%)
RRBMC & | Reads the maximum correctio that ca be applied by
each precipitatio se sor automatic calibratio .

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Command Reply Description
CHDT &| Sets the temperature differe ce (ΔT) that is mai tai ed
betwee the se sor heated base, i the automatic heat-
i g operati g mode, a d the e viro me t to value ex-
pressed i te ths of °C.
Note: the greater the ΔT, the greater the dryi g speed of
the se sor a d the greater the detectio of the e d of
precipitatio ; o the other ha d, the greater the possibil-
ity that a very light precipitatio is ot detected or causes
a oscillatio i i dicati g the prese ce/abse ce of pre-
cipitatio . The ΔT setti g is therefore a compromise be-
twee opposite eeds. If the differe ce ΔT is too low,
co de satio ca form o the se sor surface, which ca
be detected as precipitatio .
Default: 250 (=25.0 °C)
RHDT & | Reads the setti g of the temperature differe ce (ΔT) that
is mai tai ed betwee the se sor heated base a d the
e viro me t.
GRC & x y| Reads the umber of reboots (x) a d watchdog timeouts
(y) that occurred.

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6MODBUS-RTU PROTOCOL
By default, the i strume t has MODBUS address 1 a d commu icatio parameters
19200, 8E1. The address a d the commu icatio parameters ca be cha ged by usi g
the appropriate serial comma ds of the proprietary protocol or, alter atively, directly
with MODBUS comma ds by cha gi g the value of the Holdi g Registers described
later.
The MODBUS-RTU protocol, if set as the operati g protocol (default), is active after 10
seco ds from the i strume t power o .
I order to cha ge the i strume t co figuratio usi g the MODBUS-RTU protocol, the
value 1 must be writte first i the Coil umber with address 1.
Below is the list of registers.
Discrete inputs:
Address Description Format
0 I dicatio of o precipitatio (0) or precipitatio i progress (1). Bit
1 Validity of the precipitatio i dicatio : 0= o, 1=yes. Bit
2 I dicatio of the type of precipitatio :
0=rai fall, 1=s owfall.
Bit
Input Registers:
Address Description Format
0 I strume t model ide tificatio . 16-bit I teger
1 I strume t hardware revisio . 16-bit I teger
2,3 I strume t serial umber. (*) 16-bit I teger
4 I strume t firmware revisio . The most sig ifica t byte i dicates
the major revisio ; the less sig ifica t byte i dicates the mi or
revisio .
16-bit I teger
5 Number of reboots that occurred. 16-bit I teger
6 Number of watchdog timeouts that occurred. 16-bit I teger
7 Power supply voltage i Volt (x10). 16-bit I teger
8 I ter al board temperature (x10). 16-bit I teger
9 Number of 12-bit ADC cou ts, proportio al to the perce tage of
dry se sitive surface of the se sor.
16-bit I teger
10 Perce tage of dry se sitive surface of the se sor (x10 if the reso-
lutio is 0.1%).
16-bit I teger
11 Number of MODBUS commu icatio error. 16-bit I teger
12 Ambie t temperature (x10). 16-bit I teger
13 Heater temperature (x10). 16-bit I teger
14 Perce tage of heati g power used. 16-bit I teger
15 I dicatio of precipitatio abse t/i progress a d type of precipi-
tatio :
0= o precipitatio
1=rai fall
2=s owfall
16-bit I teger

HD2013.3 - 18 - V1.7
(*) The I strume t serial umber has 8 digits. Two co secutive registers must be accessed to
read the umber. The register with lower address co tai s the most sig ifica t 4 digits.
Coils:
Address Description Format
0 Set 1 to restore the factory co figuratio . Bit zeroi g is automatic. Bit
1 E able co figuratio cha ge:
0= o (default), 1=yes.
The cha ges to Coils a d Holding Registers will be accepted o ly
if this register is set to 1.
Bit
2 Sets waiti g time after tra smissio with MODBUS-RTU protocol:
0=immediate receptio (default);
1=waiti g 3.5 characters.
Bit
3 Set 1 to calibrate the i strume t. Bit zeroi g is automatic.
Set 1 o ly if the se sor se sitive surface is completely dry.
Bit
Holding Registers:
Address Description Format
0 RS485 Baud Rate:
0=1200;
1=2400;
2=4800;
3=9600;
4=19200 (default);
5=38400;
6=57600;
7=115200.
16-bit I teger
1 RS485 parity a d stop bits:
0=8N1;
1=8N2;
2=8E1 (default);
3=8E2;
4=8O1;
5=8O2.
[N= o parity, E=eve parity, O=odd parity]
16-bit I teger
2 I strume t address for the MODBUS-RTU protocol (1…247, de-
fault=1).
16-bit I teger
3 Heati g operati g mode:
0= Ma ual;
1= Always o ;
2= Always off;
3= Automatic (default).
If the ma ual mode is set, the heati g power set i the ext reg-
ister is used.
16-bit I teger
4 Heati g power for the ma ual operati g mode as a perce tage
of the maximum power (default=50%).
16-bit I teger
5 Precipitatio detectio threshold as a perce tage (x10 if the
resolutio is 0.1%) of dry se sitive surface of the se sor below
which the i strume t i dicates that a precipitatio is i progress
(default=97%).
16-bit I teger
6 Hysteresis (x10 if the resolutio is 0.1%) of the precipitatio de-
tectio threshold (0…20%, default=1%).
16-bit I teger

HD2013.3 - 19 - V1.7
Address Description Format
7 Precipitatio detectio i terval (1…30 s, default=1 s). 16-bit I teger
8 Refere ce temperature, expressed i te ths of the set u it of
measureme t, to discrimi ate betwee rai fall a d s owfall
(-50…+50=-5.0…+5.0 °C, default=+2.0 °C).
16-bit I teger
9 Hysteresis of the refere ce temperature, expressed i te ths of
the set u it of measureme t, to discrimi ate betwee rai fall a d
s owfall (-5…+5=-0.5…+0.5 °C, default=+0.5).
16-bit I teger
10 Delay i i dicati g the begi i g of a precipitatio , both rai y
a d s owy (0…32767 s, default 0).
The i dicatio of precipitatio i progress is ge erated o ly if the
precipitatio lasts lo ger tha the set time.
16-bit I teger
11 Delay i i dicati g the e d of a precipitatio , both rai y a d
s owy (0…32767 s, default 120 s).
The i dicatio of precipitatio i progress ceases o ly after the set
time has elapsed from the e d of the precipitatio .
16-bit I teger
12 Delay i i dicati g the tra sitio from rai fall to s owfall, whe the
temperature dops below the refere ce temperature (0…32767 s,
default 0).
16-bit I teger
13 Delay i i dicati g the tra sitio from s owfall to rai fall, whe
the temperature rises above the refere ce temperature plus the
hysteresis (0…32767 s, default 0).
16-bit I teger
14 Temperature u it of measureme t: 0=°C, 1=°F (default °C). 16-bit I teger
15 Co tact output activatio mode:
0= Output disabled;
1= Output activated i case of rai fall (default);
2= Output activated i case of s owfall.
Note: the precipitatio is co sidered a rai fall if the measured
temperature is higher tha the refere ce temperature, a d a
s owfall if the measured temperature is lower tha the refere ce
temperature.
16-bit I teger
16 Resolutio with which the perce tage of dry se sitive surface of
the se sor is detected:
0= 1% (default); 1= 0.1%.
16-bit I teger
17 E able the precipitatio se sor automatic calibratio at regular
i tervals: 0= o, 1=yes (default).
16-bit I teger
18 Time i terval betwee two co secutive precipitatio se sor au-
tomatic calibratio s (300…64800 s, default 1200=20 mi utes).
16-bit I teger
19 Maximum correctio that ca be applied by each precipitatio
se sor automatic calibratio expressed i te ths of %
(1…200=0.1…20.0%, default=4).
16-bit I teger
20 Temperature differe ce (ΔT) that is mai tai ed betwee the se sor
heated base, i the automatic heati g operati g mode, a d the e -
viro me t expressed i te ths of °C (default 250=25.0 °C).
Note: the greater the ΔT, the greater the dryi g speed of the se -
sor a d the greater the detectio of the e d of precipitatio ; o
the other ha d, the greater the possibility that a very light pre-
cipitatio is ot detected or causes a oscillatio i i dicati g the
prese ce/abse ce of precipitatio . The ΔT setti g is therefore a
compromise betwee opposite eeds. If the differe ce ΔT is too
low, co de satio ca form o the se sor surface, which ca be
detected as precipitatio .
16-bit I teger

HD2013.3 - 20 - V1.7
Address Description Format
21 Se sitivity of the precipitatio detectio (10…1000, default 100).
The greater the value, the greater the se sitivity.
16-bit I teger