[DG] [DG11] 400G AST, ST6001+ auto pilot system malfunctioning

[nscott54]

Good day,

I finally installed the new autopilot equipment as anticipated in the string of messages preceding this one.

In summary, my existing equipment included:
RL80C MFD
i40 depth instrument
RS130 GPS
3 x ST60 multi displays
ST60 wind display
ST1 to STng converter

The new equipment is as follows:
EV-1 course computer
ACU400
P70S auto pilot head
5 terminal STng connecting block

To a new 5 terminal STng connector block I made the following attachments
Terminal 1 - blue terminal end plug
Terminal 2 - ACU via STng spur connector
Terminal 3 - EV-1 via STng spur connector
Terminal 4 - black blanking plug
Terminal 5 - one end of a STng backbone cable

Then, to the existing ST1 to STng converter block i made the following connections:
Terminal 1 - other end of the STng backbone cable
Terminal 2 - P70S by STng connector spur
Terminal 3 (yellow plug) - RL80C, ST60 multi and wind instruments, I40 depth instrument
Terminal 4 - RS130gps by STng connector spur
Terminal 5 - blue terminal end plug

All seems to work fine including depth and heading information being displayed on the P70S.

HOWEVER, course data from the RL80c is not being found by the P70S. After setting a course on the RL80C, saving it and then selecting follow that course on the RL80C, and then hitting Auto and then track twice on the P70S, the P70S alarms with the No Navigation Data screen.

I have checked all connections - looks to be good.
The P70S “devices found “ list only shows:
Ev-1, acu400, rs130 gps, ST1-STng converter, P70s

How do I resolve this?

Thanks,

Neil Scott