Astra A5040 Kullanıcı Kılavuzu - Sayfa 11

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NMEA-0183 command Lisd.

The compass can be configured by sending various proprietary sentences to its NMEA-0183

input. Once configured, the compass will remember those settings every time it is

powered up.

Response:

When any of the following input sentences are received the A5040 will reply with an

'acknowledge' output sentence of the format:

$PATC,HCHDG,ACK<CR><LF>

except where noted to be different

5.1 AHD - Set heading:

$PATC,IIHDG,AHD,fff.f<CR><LF>

Forces the heading to a certain value by supplying an offset which is stored and used

Where f is in degrees with a valid range of 000.0 to 359.9

When f = 000.0 the result is the same as pressing switch 2

5.2 Set the internal filtering: ('damping')

$PATC,IIHDG,DHD,ddd.d<CR><LF>

Valid range for d is 0 to 100.0%

5.3 TXP - Set the Output update period in ms:

$PATC,IIHDG,TXP,uuuu<CR><LF>

note, minimum resolution – 10ms; Range: 100 to 2500 ms

Valid range is u=100 to 3000 milliseconds. This is limited by max. data rate of NMEA-0183

output at 4800 baud.

5.4 Start Auto-Calibration

$PATC,IIHDG,IAC<CR><LF>

Same as pressing Switch 1

5.5 Abort Auto-Calibration.

$PATC,IIHDG,XCL<CR><LF>

thereafter.