Lambrecht sun[e] 00.16130.501030, Руководство пользователя

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5.8
Network communication: getting started
Once it has the correct Modbus address and communication settings, sun[e] can be connected directly
to an RS-485 network and a power supply.
Installing a sun[e] in the network also requires configuring the communication for this new Modbus
device. This usually consists of defining a request that can be broadcast by the master.
Typical operation requires the master to make a request of irradiance data in registers 31501 + 31502
every 1 second, and store the 60 second averages. The data format of register 31501 + 31502 is a
signed 32 bit integer.
Note: Up to five 16 bit registers can be requested in one request. In case six or more registers are
requested in just one request, sun[e] will not respond. If requesting six or more registers, multiple
requests should be used: sun[e] will respond as expected.
5.9 Adapting the Modbus address and communication settings
Setting the instrument address and baud rate can be done in different ways:
•
by connecting the sensor to the PC and using a Modbus testing tool. There are links to
different solutions available at
www.modbus.org
;
•
by using the available network user interface software.
The Modbus address is stored in register 40001 and has a default value of 11. A user may change the
address to a value in the range of 1 to 247. The address value must be unique in the network. The
baud rate is stored in register 40200.
The default communication frame is 19200 baud, with even parity bit, 8 data bits and 1 stop bit. After a
new address or communication setting is written the sensor must be restarted.