SSC300 User’s Manual
Page A4
Appendix A
– NMEA 0183 Interfacing
Revision 1.0
$PMAREXE,SSC300,,5D,2,,,<CR><LF>
This command causes the SSC300 to use variation data from the NMEA 0183 interface and ignore all
other variation sources (i.e., NMEA 2000
®
interface and manual entries).
$PMAREXE,SSC300,,5D,3,,,<CR><LF>
This command causes the SSC300 to be set back to the factory default where variation data is used from
either the NMEA 0183 interface or the NMEA 2000
®
interface.
$PMAREXE,SSC300
,,5E,2,”damping period”,,<CR><LF>
This command causes the SSC300 to use a rate of turn damping rate corresponding to the value
programmed in
“damping period”
. The damping period is programmable from 100 to 60000, which
represents 100ms to 60 seconds.
$PMAREXE,SSC300,,5E,11,,,<CR><LF>
This command causes the SSC300 to zero the rate of turn indication and record the compensation value
used, along with the current operating temperature of the compass. The boat must remain at rest for a
period of one minute after this command is issued.
$PMAREXE,SSC300,,5E,12,,,<CR><LF>
This command causes the SSC300 to cancel any rate of turn zeroing operations currently in progress.
$PMAREXE,SSC300,,50,,,,<CR><LF>
Will cause the SSC300 to retransmit the last deviation calibration status message
PMARSETPX
– Maretron Proprietary Set Period Sentence
The SSC300 can be programmed to enable or disable the periodic transmission of the HDG, HDM, HDT,
ROT, and PMAROUT sentences. In addition, the periodic transmission rate for these sentences and the
Variation Lifetime (see RMC and VTG) can be programmed using this sentence.
$PMARSETPX,SSC300,,A,B*hh<CR><LF>
Field A: Identifier code, identifies the sentence or parameter to be programmed (see following table)
B:
Integer where “0” disables sentence and positive numbers are multipliers of 1ms (i.e.,
programmed integer of 200 would mean a 200ms transmission interval)
Identifier Code
Sentence
Default Rate
00
HDG
100 (100ms)
01
HDM
0 or Disabled
02
HDT
0 or Disabled
03
ROT
200 or 200ms
04
PMAROUT
1000 or 1sec
0A
Variation Lifetime
5000 or 5sec
Some example sentences are shown below:
1. To disable transmission of the HDG sentence:
$PMARSETPX,SSC300,,00,0
2. To enable transmission of the HDG sentence at intervals of 100 ms:
$PMARSETPX,SSC300,,00,100
3. To disable transmission of the HDM sentence:
$PMARSETPX,SSC300,,01,0
4. To enable transmission of the HDM sentence at intervals of 1000 ms:
$PMARSETPX,SSC300,,01,1000
