Elsner

The Elsner P03/3-MODBUS is a solid-state weather station with a standard Modbus RTU slave interface. It measures temperature, wind speed and brightness (eastern, southern and western sun) and recognizes precipitation.

Communication

The P03/3 has a Modbus interface. The default connection parameters are:

• Modbus address: 1
• RS-485 parameters:

Baud rate	19200
Data bits	8
Stop bit	1
Parity	even
Flow control	none

Refer to the P03/3 data sheet for installation, wiring and power supply requirements.

note

The P03/3 may take about 60 seconds after power-up before it supplies a correct wind value.

HSYCO Configuration

Add an ELSNERP03M I/O Server in the I/O Servers section of the Settings and set its parameters:

Communication

• Comm ID: the id of the serial port, when HSYCO is wired directly to the RS-485 bus and acts as Modbus RTU master.
• IP Address and IP Port: the address of the Modbus/TCP gateway, when the P03/3 is reached through a gateway. Leave the port blank to use the default port 502.

Set either the Comm ID or the IP address. When both are set, the Comm ID takes precedence.

High Availability

• Shutdown when inactive: defaults to true.

Options

ID	Default	Values	Description
gui	false	true	enable support for the UISET actions
		false	disable UI support
startupevents	false	true	generate IO events also during the driver’s start-up phase
		false	start generating events only after HSYCO is aligned with the current status of the system
pollinterval	30	> 0	the data acquisition interval, in seconds
address	1	1 ... 247	the Modbus address of the P03/3 device

Datapoints

ID	Value	R/W	Description
connection	online	R	connection established to the P03/3
	offline	R	HSYCO can’t connect to the P03/3
temp	signed integer -40C .. +80C	R	signed integer representing the measured temperature, in 10th of Celsius degrees (e.g. 210 corresponds to 21.0C)
light	positive integer 0 .. 99	R	sun light in kilolux, equal to the maximum value detected by the three side sensors
light.east	positive integer 0 .. 99	R	sun light in kilolux, detected from East-side sensor
light.south	positive integer 0 .. 99	R	sun light in kilolux, detected from South-side sensor
light.west	positive integer 0 .. 99	R	sun light in kilolux, detected from West-side sensor
light.lux	positive integer 0 .. 999	R	ambient light in lux, for twilight and dawn detection (P03/3 input register 4)
wind	positive integer	R	wind in 10th of m/s (e.g. 32 corresponds to 3.2 m/s)
rain	0	R	no rain
	1	R	rain

note

To keep the event log readable, small fluctuations are filtered out: a new value is reported only when it differs from the last one reported by more than 0.1 °C for "temp", more than 1 lux for "light.lux" and more than 0.2 m/s for "wind". The "light", "light.east", "light.south", "light.west" and "rain" data points are reported on any change.

User Interface

UISET Actions

ID	Attribute
temp	value	the current temperature in Celsius degrees with one decimal digit, followed by " °C"
light	value	the current sun light in klux, followed by " klux"
light.lux	value	the current ambient light in lux, followed by " lux"
wind	value	the current wind in m/s, followed by " m/s"

Release Notes

3.10.1

• fixed the "light.east" and "light.west" data points, that were swapped: each one was reporting the value of the opposite sensor. EVENTS rules, scripts and user interface objects written to compensate for the swap have to be updated
• the "light.lux" value is in lux, not in 10th of lux. The data point value is unchanged, but its UISET value was showing one tenth of the measured brightness and now shows the correct value, without decimal digits
• fixed the light UISET value, that was showing "lkux" instead of "klux"

3.6.0

• fixed a bug that could cause erroneous readings of negative value temperatures

3.5.0

• new "light.lux" data point

2.10

• full integration in HSYCO 2.10.0

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