Hardware manual

Chapter 2 - TeleFlow Standard ACCOL Load
TeleFlow™ Standard ACCOL Load
2-6
Communications Port Assignments
PORT #1 - Pseudo-slave local port, 19200 bps.
PORT #2 - BSAP network port, 9600 bps.
The baud rate and the RTS/CTS delay may be changed on-line.
Communication Port Usage
The Local port is used for local configuration and data collection. It usually connects
to a PC or Laptop that is running a user-interface software package like TMS or
UOI. The Local port will respond to any address; therefore it CANNOT be used in a
multi-drop connection. Only the Network port can be multi-dropped (with the
necessary external RS-485 converters).
The Network port is used generally for data collection via Bristol Peer-to-peer
messages coming from another Bristol device such as a Data Concentrator; for this
kind of data collection a number of defined lists are provided as well as Slave
modules for each list. This port can also be used for data collection or configuration
by software such as Open BSI, UOI, TMS, or other third party BSAP protocol based
communication systems. The Network port will not respond to messages unless its
DCD input is high.
Gas Flow Calculations
Either the 1985 or 1992 AGA3 calculations can be selected; 1985 calculations are
suitable for both Flange and Pipe taps; 1992 calculations only use Flange taps.
AGA3 calculations are performed at the end of the configured Calculation interval.
(Note: Maximum power conservation is achieved by using the longest calculation
cycle.)
The Calculation interval is user configurable at 1, 2, 5, 15, or 60 seconds. Under
certain conditions the Calculation interval is forced to 1 second. These conditions
are:
The Local Communications port is in use.
The LCD Display button has been pushed and the unit is scrolling the Display List.
The unit is in 'charge regulation' mode