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[DG11] Autopilot/system cabling questions
06-11-19, 11:47 AM (This post was last modified: 06-12-19 08:11 AM by Derek - Raymarine - Moderator.)
Post: #1
[DG11] Autopilot/system cabling questions
Good afternoon,
I have been slowly troubleshooting an issue with my autopilot. Originally it was oscillating about 12" to port and then immediately the same distance to starboard, back and forth. I rebuilt the hydraulic cylinder and it no longer does that but goes hard over upon pushing the 'auto' button on the P70.

So far in the process I have updated the autopilot components to the newest software versions successfully but still need to update the Stng converter and the RS130. I have attached a diagram of the current wiring and hoped you could take a look at it to see if I am on the right track. In reading other threads in the forum I plan to change the current configuration by installing a power bus which will provide power to the ACU, the Stng backbone and the ST60 instruments individually and turn off the ACU power out switch (currently powering everything). I also read that I should cut and isolate the red wire in the splice from the ST60's.

Other than feedback on the diagram my other questions are:
1. Should I cut the red wire in the current splice and leave the bare to bare wires and the yellow to yellow wires attached as shown?

2. In adding separate power to the ST60's what is the correct colors of wire to connect to each other and the power bus?

My current equipment is:
P70, V3.08
ACU 400, V2.23
EV1, V3.02
R130, V2.20
Stng Converter, V1.21
E120 Classic, V5.69
E80 Classic, V5.69
(3) ST60+

Thanks, you guys have been a great help so far!!


Attached File(s)
.pdf  Instrument Schematic_0001.pdf (Size: 659.68 KB / Downloads: 2)
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06-12-19, 08:21 AM
Post: #2
RE: [DG11] Autopilot/system cabling questions
Hi Kmac
Thank you for your enquiry.

One of the issues is the power to the ST60s. They should be powered separately and the red wire in the splice disconnected and insulated. The STng then has it's own power supply which feeds the STng connected displays and the ST60s have their own supply. The Power to the ST60s is simply 12v to the red SeaTalk wire and 0v to the bare wire (or screen/ Shield).

The STng, the ACU400, the E120 and E80, the ST60 network will all require their own power supply.

if the Autopilot still continues to go hard over when AUTO selected:-

Select STANDBY, turnt he wheel to starboard - does the rudder angle display show green? If yes, good, if RED, then reverse the RED and GREEN wires of the rudder reference unit where it is connected to the ACU.

Once the rudder angle displays correctly in Standby, then Select AUTO and quickly press 3 x =10, does the drive turn to Starboard? If yes, good, if no, reverse the polarity of motor wires connected to the ACU.

Regards

Derek
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07-10-19, 07:36 AM (This post was last modified: Today 09:10 AM by Derek - Raymarine - Moderator.)
Post: #3
RE: [DG11] Autopilot/system cabling questions
Hi Derek,
Thank you so much for your help to date, hopefully I am getting closer to solving the autopilot issue! I have attached a new diagram for the most recent wiring based on your input.

Since my last post I have purchased and installed a new Stlk-Stlkng converter with the most recent software. All instruments are now updated with current software. I have also had the EV1 and ACU400 bench checked by Raymarine, they checked out fine. After rewiring the instruments I performed a factory pilot reset on the P70 and performed the dockside calibration, the rudder reference indicator moved smoothly and in the proper direction (as a side note I also tried reversing the motor leads just in case they were backwards which caused the motor to oscillate rather violently so I put them in their original location and assumed the leads were correct). I then linearized the EV1 successfully with a deviation of 7 degrees. I then took the boat out to test the autopilot with the following results.

When on a steady heading in calm seas I pushed the auto button, the boat went immediately hard over to the stop to starboard, I pushed the standby button and gained control again. I also set up a waypoint in the E120 and tried to track to that waypoint with the boat going hard over to the stop to port. (note, since the autopilot has not worked since I purchased the boat and have never set up a waypoint it is possible that user error was in part responsible for the issue.)

I have a couple of questions and observations which may help you give me some additional insight into further troubleshooting.
1. The P70 and E120 both show the same heading which is within 4 or 5 degrees of the compass. The GPS position is accurate showing the boat in my slip.
2. All of the instruments appear to be supplying accurate data.
3. When diagnostics is run on the P70 all of the Seatalkng devices are shown with accurate software versions etc. The E120 is shown with what seems to be a random name but with the correct information associated with it. The ST60+ instruments are not shown.
4. The P70 shows 'track' grayed out in mode selection. When I tried to track to the waypoint the P70 showed an alarm 'No navigation data'.
5. When 'diagnostics', 'external' is run on the E120 it does not show any Seatalk or Seatalkng devices. The reply is 'no devices found'.

Q1, Where does the P70 and the E120 derive its navigation data?

Q2, Since the E120 is quite old and has been in the cockpit since installed and was originally wired to the Seatalk port I am wondering if there may be a problem with the Seatalk2 port. Is there a way to test the pins to verify data is being transfered?

As always, thank you for your help!


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