Velocity Edge GX440 Guide de l'utilisateur Page 217

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Global Positioning System (GPS)
Rev 2.3 Feb.12 217
TAIP Emulation Configuration
The TAIP emulation functionality allows the AirLink device to operate in a limited
manner with clients which only understand the Trimble ASCII Interface Protocol
(TAIP). This emulation is enabled by setting the GPS report format, directing the
modem to listen for TAIP messages, and disabling RAP formatted messages to
the same interface.
TAIP ID
TAIP messages can be configured to send the user specified identification
number (ID). This greatly enhances the functional capability of the unit in a
network environment. Set the ID using *PPTAIPID.
TAIP Command Emulation
With TAIP emulation, the AirLink device will listen for TAIP messages on port
21000. Set the GPS Report Type, *PPGPSR, to your preferred TAIP data format.
•F0 - TAIP data (LN): latitude, longitude, altitude, the horizontal and vertical
speed, and heading.
•F1 - Compact TAIP data (PV): latitude/longitude, speed, and heading.
Caution: When TAIP emulation is enabled, RAP will be disabled and no RAP messages
or commands will be sent or received on that port.
Supported TAIP Commands
The TAIP emulation will accept the following TAIP message types:
•SRM (Set Reporting Mode) allows the client to set the reporting mode config-
uration. The report mode configuration is not stored in non-volatile memory,
and such should be resent upon a unit reset. This behavior emulates that
specified in TAIP specifications.
•QRM (Query Reporting Mode) reports the reporting mode configuration
(returns an “RRM” message).
•SID (Set ID) allows the client to set the TAIP ID (AT*PPTAIPID can also be
used to set the TAIP ID). The TAIP ID, when set with a “SID” message, will be
written to non-volatile memory.
•QID (Query ID) reports the TAIP ID (returns an “RID” message).
•DPV configures automatic reporting of PV (Position/Velocity) reports based
on distance traveled and a maximum time. The delta distance value specified
in the message is converted to hundreds of meters and stored as *PPDIST.
The maximum time interval is stored as *PPTIME. Currently, the minimum
time and epoch values are ignored.
•FPV configures periodic reporting of PV (Position/Velocity) reports. The time
interval from the message is stored at *PPTIME. The epoch value is ignored.
•QPV (Query Position Velocity) responds with a PV (Position/Velocity) report.
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