Kongsberg 1007D, Operator'S Manual

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974-72007001/1.0 1007D Altimeter Operators Manual
Page 18 Telemetry
Kongsberg Mesotech Ltd.
Port Coquitlam, BC - Canada
4 TELEMETRY
The standard 1007D altimeter initially communicates with an
RS232/485 asynchronous serial interface for compatibility
with MS1000 systems. The power-up auto-detect feature
attempts to detect the presence of an MS1000 host by
switching between both interface types (RS232 or RS485)
over the same cable wires. If the altimeter is configured for a
standalone (80x) mode, the search for an MS1000 host ceases
about 10 seconds after power-up, and the standalone mode is
entered with the interface changing to the fixed interface type
and baud rate specified by the factory default settings. Once
the standalone mode is entered, the interface and baud rate
remain fixed until the unit is powered down. If the altimeter is
specifically configured in MS1000 mode only, the standalone
mode is not entered, and the unit continues to search for an
MS1000 host.
For special customer requirements, an RS422 interface is
available, requiring the altimeter be fitted with a minimum 6-
pin connector.
By definition, the 808 and 809 digital communications are
full-duplex. This is the case when the telemetry interface is
configured as RS232. However, the 1007D’s RS485 telemetry
interface configuration is optimized for half-duplex MS1000
solicited protocols and full-duplex RS422 is not directly
supported. To use RS422, the 1007D should be configured as
RS485 and the external computer should employ the
following procedure to control pinging and issue commands
in standalone modes:
a)
Issue XOFF (Ctrl-S) character to the altimeter,
immediately after the end of next altitude string output
by the altimeter. This will pause pinging and data up-
link.