PCE Instruments PCE-WS RS485 Handleiding
PCE Instruments
Meetapparatuur
PCE-WS RS485
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APPLICATIONS
PCE-WS RS485 Modbus has been designed to be used in industrial applications: cranes, solar panels, wind turbines, weather stations,
greenhouses, irrigation systems...
It is usually connected to process displays, PLC’s or dataloggers to display the wind speed and/or set alarms to predened values or to
obtain records during predened periods of time.
OPERATING
Up to 180 km/h of wind speed.
Output is a RS485 MODBUS RTU.
The wind sensor must be xed on a vertical position.
CONNECTION
Unit is provided with a 4x0.65mm cable with 25 meters lenght.
Wire colors:
VCC: blue
GND: white
A: orange
B: yellow
Termination resistor included (120 Ω)
For no termination resistor version, please, contact us.
PROTOCOL
Data format:
1 start bit, 8 data bits and 1 stop bit. 19200 baudios. Even parity. (For other options, please, contact us)
Protocol type:
MODBUS RTU
Addr 04 00 00 00 01 CRCH CRCL
The wind speed in km/h is stored in 2 registers: @30001 y @40001. The user can read this value by using any of the 2 available
functions (Read Input Register and Read Holding Register).
The PCE-WS RS485 default adress is 244 <=> 0xF4. This value is stored in Holding Register @40002 and can be edited by the user.
The user can congure any adress in the range 1 (0x01) to 255 (0xFF).
DIMENSIONS
PCE-WS RS485 Modbus
139
131
91
50
Ø122,73
Ø5,2
10
© PCE Instruments
Example: If Addr =3
READING. METHOD 1
Read request of wind speed from master by (function 0x04):Read Input Register
03 04 00 00 00 01 30 28
Slave's answer (PCE-WS RS485 MODBUS RTU):
03 04 02 SH SL CRCH CRCL
SHSL is the wind speed value in km/h.
Slave's answer example for 100km/h (0x0064):
03 04 02 00 C1 1B64
READING. METHOD 2
Read request of wind speed from master by (función 0x03):Read Holding Register
03 03 00 00 00 01 85 E8
Slave's answer (PCE-WS RS485 MODBUS RTU):
03 03 02 SH SL CRCH CRCL
SHSL is the wind speed value in km/h.
Slave's answer example for 100km/h (0x0064):
03 03 02 00 C064 6F
WRITING
Write request of by Address Write Single Register (función 0x06):
03 00 01 00 NEW_ADDR CRCH CRCL06
Note: The unit adress (Addr) is stored in the Holding Register @40002
Slave's answer (PCE-WS RS485 MODBUS RTU):
03 00 01 00 NEW_ADDR CRCH CRCL06
NEW_ADDR is the new unit address. It must be in the range from 1 (0x01) to 255 (0xFF).
Example for NEW-ADDR 0x02:
Write request:
03 00 01 00 02 58 2906
Slave's answer:
03 00 01 00 02 58 2906
NOTE: the slave's address changes its value inmediately after the answer message.
Product specificaties
| Merk: | PCE Instruments |
| Categorie: | Meetapparatuur |
| Model: | PCE-WS RS485 |
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