Help on debuging nmea message

[the_magican]

Hi all!.

I have i gyro equipment sending the following data string:
$PPLAC,0,0,0,00.0,E,060416,1217,000.0*08

I am not able to find any reference to this online... Anbody that have a reference to this PPLAC ?
The official NMEA papers do not show it, i guess this could be du to the fact it starts with a P(ropraitairy).

all assitance is much apreachiated.

 

[saadbinshafique]

which gyro equipment you have?
Can you please give its serial number?

 

[paulfjujo]

hello


NMEA concerne GPS ...
are sure GYRO is concerned with NMEA standard ?

 

[the_magican]

which gyro equipment you have?
Can you please give its serial number?

It is an Sperry navigat X mk1 gyro..

 

[the_magican]

hello


NMEA concerne GPS ...
are sure GYRO is concerned with NMEA standard ?

Yes, the NMEA standard concernes alot of diffrent types og equipment. a gyro normaly outputs $HEHDT,XXX.XX*cc and $HEROT,XX.X*cc

 

[FvM]

Did you review the instrument manual?

 

[upand_at_them]

Yes, proprietary sentences start with "$P". You'll need to get the sentence definition from the manufacturer.

 

[the_magican]

So finally i got a stament from the vendor of this equipment, although this was not a complete description i gave enough information to go ahead with some reverse engineering...
Since you guys have assisted me i thought i would share my findings her for later reference.

$PPLAC,0,0,0,00.0,E,060416,1217,000.0*08
| | | | | | | | |
| | | | | | | | +- checksum
| | | | | | | +- Heading data 000.0 to 360.0 degrees, relative north
| | | | | | +- HHMM = Hours and minutes relative to utc.
| | | | | +- DDMMYY, Day month year
| | | | +- Magnetic variation signer
| | | +- Magnetic variation value
| | +- Heading source in use, agreed externaly between gyros.
| + Alarm status, 0 = Alarm active, 1 = alarm innactive.
+- Alarm number, se alarm list:

Alarm list:
0 = gyro 1 fail
1 = gyro 2 fail
2 = gyro 3 fai
3 = magnetic failure
4 = speed fail
5 = speed 2 fail
11 = Position fail
12 = position 2 fail
13 = heading diff fail
14 = max rot exc
15 = gyro cur alarm
16 = DC supply fail
17 = AC supply fail
18 = Div by zero
19 = corr value
20 = op.time fail
21 = Answer fail
22 = poss error
23 = sensor error
24 = sett locked
25 = lsr85 fail
26 = ntiv com err
27 = mag var fail
99 = will delete / reset all active alarms from gyro.