Raymarine st60 - true wind 3 dashes

[elias]

Hi to all,
Does anyone experienced this issue ? The units are inline connected wits seatalk cable  , st60 tridata-st60 wind - st6001+ autopilot. Everything works ok since purchase except true wind

[markleuty]

I think that for the True Wind to display, the thru-hull log needs to be working as it uses speed through the water in its calculations

Mark

[elias]

If you mean wherever I have speed reading , yes I have and quite accurate . I suspect something with the way of wiring

[Clivert]

You need to be moving to see Apparent Wind but not for true wind

[SorinCT]

If you mean wherever I have speed reading , yes I have and quite accurate . I suspect something with the way of wiring

Just check the back of the unit for loose or bad connections for the analog data.

[elias]

Clivert-I tried when moving .
SorinCT-I believe that if it was loose it wouldn’t power the rest of the instruments because they are bridged in line , or you suggest to check for voltage ?

[Clivert]

Apparent wind is in effect the change in wind angle and speed caused by the boats movement in relation to the true wind.
If the boat is stationary the wind angle and speed are true.
Check your settings

[SorinCT]

Clivert-I tried when moving .
SorinCT-I believe that if it was loose it wouldn’t power the rest of the instruments because they are bridged in line , or you suggest to check for voltage ?

Instruments are powered via the seatalk cable. Each instrument has a seatalk cable for series connection between units (crosstalk) and separate tranceducer input (analog). In the picture above is the tranceducer wiring (data only).

[elias]

So there is a seatalk cable coming from the hull and connected to the pilot then from the pilot to the speed Tridata and finally from tridata to wind as in the picture
Where is the calculation of true wind is occurred ? In the Raymarine big box inside the hull?

[Salty]

The calculation of true wind Speed and direction occurs within the wind speed and direction display unit based on the information it receives from each of the relevant transducers. So true wind will be a combination of relative wind speed and direction from your masthead wind transducer combined with vessel speed from your speed log plus direction from your auto pilot compass or possibly from from speed over the ground and course made good from your GPS. Each transducer sends out its own specific signals which are received primarily by the display unit it is destined for, but also by some other instruments as appropriate. In the case of true wind speed and direction those signals are received and  correlated by your wind instrument and also by a multifunction display instrument if you have one installed. From that correlation your true wind speed and direction can be determined and displayed.
It is possible that the course computer may have a hand in the calculations for true wind speed and direction, though I’m fairly certain that true wind was displayed as an option on the wind instrument before I fitted an an autopilot and course computer.

[elias]

Do you think it can work only with combining tridata and wind WITHOUT the auto pilot ? I think my auto pilot unit might has a false compass reading ( some LCD elements are blank of wear )

[tckearney]

have you reset your autopitol compass by doing the two circle bit and have a error reading of between 10 and 5.  If not try this.  Its in the instruction manual

[elias]

My next try will be this . But I thought it should work jut with the speedometer and windmeter . I ll keep updated

[Rampage]

ST60 wind direction has two values: true and apparent.  Both are in relation to the boat heading not the compass course.  The wind display uses the log for speed of the boat and the transducer signal for apparent wind speed and direction.  It will calculate the difference between apparent and true speed and direction and display as selected.
The true wind speed cannot be calculated if the log isn’t generating a speed through the water, so that may be the problem. 
On the YBW forums a while back, someone produced a box which took the gps derived speed over ground and converted that into the same signal as the log paddle wheel outputs, which enabled the triadata to output the boat speed on the Seatalk network, thus enabling the true wind to be displayed.

[SorinCT]

So there is a seatalk cable coming from the hull and connected to the pilot then from the pilot to the speed Tridata and finally from tridata to wind as in the picture
Where is the calculation of true wind is occurred ? In the Raymarine big box inside the hull?

What about that disconnected pin on top right? And condition of connections for wind instrument?

[elias]

ST60 wind direction has two values: true and apparent.  Both are in relation to the boat heading not the compass course.  The wind display uses the log for speed of the boat and the transducer signal for apparent wind speed and direction.  It will calculate the difference between apparent and true speed and direction and display as selected.
The true wind speed cannot be calculated if the log isn’t generating a speed through the water, so that may be the problem. 
On the YBW forums a while back, someone produced a box which took the gps derived speed over ground and converted that into the same signal as the log paddle wheel outputs, which enabled the triadata to output the boat speed on the Seatalk network, thus enabling the true wind to be displayed.

So if I make a stand-alone connection to tridata (12v and transducers only) and then plug a seatalk cable to the windometer theoretically will it work ?

[elias]

So there is a seatalk cable coming from the hull and connected to the pilot then from the pilot to the speed Tridata and finally from tridata to wind as in the picture
Where is the calculation of true wind is occurred ? In the Raymarine big box inside the hull?

What about that disconnected pin on top right? And condition of connections for wind instrument?

The disconnected is a 12v cable that is converted to seatalk and was powering the speedometer. You are seeing a setup that i connected all the instruments to the auto pilot via seatalk cable to test if the problem solved, but no luck

[SorinCT]

I would really start by making sure all the crimped connectors are in good shape. From what i can see they are in just as bad shape as mine. I don't know if this is "yard spec" or done diy but the system was highly unreliable.

[elias]

Did the autopilot alignment but still 3 dashes in true wind . I also notice that in the tridata I can’t emter the intermediate calibration to choose if it will be master or slave .