User Manual

73
CONTROL BOARD AND DISPLAY SCH0135AR1
DESCRIPTION
The Controller module, located on the right side of the DIGITAL TRANSMITTER, is the user interface of
the whole modulator. It gathers the data from all the sections of the modulator, processes them by means of a
16bit flash micro-controller by Fujitsu and makes them available to the user both through the local interface,
composed by a display and a knob, and the remote interface made up by the serial port (either the RS232 on
the front or the RS485 on the back, as selected) or the interface of the telemeasuring connector.
The acquisition and setting of all the concerned parameters is made in two different ways. Analog measures
reach the board from the individual modules as voltages, are conditioned on the board and then converted by
an internal A/D converter in the micro.
The remaining parameters are gathered through a 2-wire RS485 interface, with the modulator. The display
board acts as master on this 485 bus. Besides it is provided with an RTC and a non-volatile memory on an
internal I2C bus.
- Dip-Switch
The display board is provided with 4 dip-switches. The dip-switches 3 and 4 are used to program the flash
memory of the flash micro-controller by Fujitsu, in detail:
DIP3: On DIP4: Off Boot Programming
DIP3: Off DIP4: On Run or Firmware Programming
The "Boot Programming" configuration is only for BIOS programming purposes.
Once the BIOS has been programmed, the firmware has to be programmed at least once in order to use the
board. The firmware programming and the normal operation of the board are obtained with the same position
of the dip switches.
For more detail on Firmware upgrade please refer to the "Firmware Upgrade" section.
TECHNICAL CHARACTERISTICS
Flash ROM 256kByte
RAM 6kByte
EEPROM 64kBit
Serial interfaces 2xRS485 or 1xRS485 + 1xRS232
Graphic display 128x64pixel blue with white LED backlight
Encoder Mechanical with push button
Clock and Calendar Lithium battery backup
Telemeasures Output: FWD, REF, Alarm/Mute
Input: Remote ON/OFF