Aalborg XFM Digital Manual de usuario descargar pdf (Pagina 7)

2.2.3 Communication Parameters and Connections

The digital interface operates via RS485 (optional RS-232 or Profibus DP avail-

able) and provides access to applicable internal data including: flow, CPU tem-

perature reading, auto zero, totalizer and alarm settings, gas table, conversion

factors and engineering units selection, dynamic response compensation and lin-

earization table adjustment.

Communication Settings for RS-485/RS-232 communication interface:

Baud rate: ...................... 9600 baud

Stop bit: ...................... 1

Data bits: ...................... 8

Parity: ...................... None

Flow Control: ...................... None

RS-485 communication interface connection:

The RS485 converter/adapter must be configured for: multidrop, 2 wire, half

duplex mode. The transmitter circuit must be enabled by TD or RTS (depending

on which is available on the converter/adapter). Settings for the receiver circuit

should follow the selection made for the transmitter circuit in order to eliminate

echo.

RS-485 T(-) or R(-) ...................... pin 8 of the 15 pin "D" connector (TX-)

RS-485 T(+) or R(+) ...................... pin 15 of the 15 pin "D" connector (RX+)

RS-485 GND (if available) ...................... pin 9 of the 15 pin "D" connector (GND)

RS-232 communication interface connection:

Crossover connection has to be established:

RS-232 RX (pin 2 on the DB9 connector) ..... pin 8 of the 15 pin "D" connector (TX)

RS-232 TX (pin 3 on the DB9 connector) ..... pin 15 of the 15 pin "D" connector (RX)

RS-232 GND (pin 5 on the DB9 connector) ..... pin 9 of the 15 pin "D" connector (GND)

1 2 3 4 5 6 7 8 9 10 11 12 ... 55 56

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Aalborg XFM Digital Manual de usuario Pagina 7