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2.2.3 Communication Parameters and Connections
The digital interface operates via RS485 (optional RS232) and provides access to
applicable internal data including: flow, CPU temperature reading, auto zero, total-
izer and alarm settings, gas table, conversion factors and engineering units selec-
tion, dynamic response compensation and linearization table adjustment.
Communication Settings for RS485 / RS232 communication interface:
Baud rate:
......................
9600 baud
Stop bit:
......................
1
Data bits:
......................
8
Parity:
......................
None
Flow Control: ......................
None
RS485 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.
RS485 T(-) or R(-)
...................... pin 8 of the 15 pin “D” connector (TX-)
RS485 T(+) or R(+)
...................... pin 15 of the 15 pin “D” connector (RX+)
RS485 GND (if available) ...................... pin 9 of the 15 pin “D” connector (GND)
RS232 communication interface connection:
Crossover connection has to be established:
RS232 RX (pin 2 on the DB9 connector)
..... pin 8 of the 15 pin “D” connector (TX)
RS232 TX (pin 3 on the DB9 connector)
..... pin 15 of the 15 pin “D” connector (RX)
RS232 GND (pin 5 on the DB9 connector) ..... pin 9 of the 15 pin “D” connector (GND)
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Содержание FMA 4000
Страница 1: ...www omega com e mail info omega com User sGuide FMA 4000 Digital Mass Flow Meters Shop online at...
Страница 50: ...46 APPENDIX IV COMPONENT DIAGRAM TOP COMPONENT SIDE Aug 09 2007...
Страница 51: ...47 BOTTOM COMPONENT SIDE Aug 09 2007...
Страница 52: ...APPENDIX V DIMENSIONAL DRAWINGS FMA 4000 WITHOUT READOUT 48...
Страница 53: ...FMA 4000 WITH READOUT OPTION 49...