JUMO 902931 Wtrans Receiver with Wireless Data Transmission Operating Manual - Manual (Page 20)

3 Basic principles
20
Wireless receiver
The receiver is constantly active to receive the wireless telegrams of the active transmitters. It
checks whether each wireless telegram received is complete.
If the wireless telegram is valid, it is transferred to the processor for further processing, in the
same manner as the demodulated measured data.
Keypad
The function keys enable operation and configuration of the receiver without the setup pro-
gram.

Chapter 6 "Display and key functions", page 35
LCD display
In the normal display, the two rows of the LCD display show the current values. In the startup
and parameter levels, they facilitate the operation and configuration dialog.

Chapter 6 "Display and key functions", page 35
LEDs
The top bicolor LED is green when voltage is applied, i.e. the device is operating. It flashes red
in the event of a collective alarm. The bottom yellow LED flashes with every valid wireless tele-
gram (data packet) from the transmitter. The flash frequency increases with the number of
transmitters.

Chapter 6 "Display and key functions", page 35
Setup interface
The device is equipped with a setup interface to allow configuration via the setup program. For
this purpose, the front features a connector for interface lines with TTL/RS232 or USB/TTL con-
verters for connection to a PC.
The setup interface is set with the following values by default:
Baud rate: 9600 bit/s, data format: 8 data bits, 1 stop bit, no parity,
minimum response time: 0 ms, device address: 1.

Chapter 9.1.3 "RS485 interface", page 67
 Chapter 11 "Setup program", page 81
Actual value calculation for the analog channels
General information
The wireless telegram detected by the receiver is transmitted to the controller for actual value
calculation. Here, the individual measured values are processed.
The controller then calculates the respective measured value from the transmitter count values.
Linearization and temperature calculation automatically follow the probe characteristic line.
1 Wireless receiver 7 Automatic changeover
of the interfaces
2 Keypad
3 LCD display 8 Analog outputs
4 LEDs 9 Relay outputs
5 Setup interface 10 RS485 interface
6 Actual value calculation
for the analog channels 11 Voltage supply