Skip to main content

Finally got the new WTIU and replaced my old and tired RevL and WIU. Why would some of my PS3 engines NOT be seeing the watchdog signal and be turning on and taking off? I read somewhere on the forum where conventional reset may be needed. Why would this be needed if they never have been run in conventional mode? All track is Gargraves and wiring is by the book (barry's). Never had this issue with the TIU, WIU before. Any help would be much appreciated?

Mike

Original Post

Replies sorted oldest to newest

Hold on, let's step back and look at the entire scenario:

A Watchdog signal is ONLY sent when a channel first sees the power turn on in that channel. Caveat- also needs the electronics of the TIU powered and ready to sense that power on event to be able to send the watchdog.

I don't claim to know everything about the internal structure of the new WTIU- but what I do know is it takes time for the processor and operating system (similar to the WIU structure) to boot up from first getting power via the power adapter. I don't know if there is a secondary microprocessor involved that is the "TIU" portion of WTIU, such that it can boot rapidly and send a watchdog before the WIU portion completes booting up- which again takes significant time.

So again, what I don't know is your entire scenario. Lets say you have a power strip, and that power strip is what you use to power on your system at the beginning of a session. Let's also say you are using track power transformers that turn on track power- as soon as you turn on that power strip. The old scenario of a TIU +WIU, the WIU could still be booting up but the TIU and it's processor boot within seconds of power on- so it could send out a watchdog.

Let's say you replaced all that with the new WTIU and it's power supply is plugged into the same power strip. You walk in, turn on the power strip, your transformers apply power to the track inputs, at the same time the WTIU just got power from the power adapter and possibly still booting up. This could allow track power out to the track and yet the WTIU was not even ready to send a watchdog.

Bottom line, we need a lot more details of how exactly your setup is powered and wired, is the WTIU fully powered first and booted up (it's power adapter in a constant on outlet)? When and how are you turning on track power and what source (transformers)?

Hold on, let's step back and look at the entire scenario:

A Watchdog signal is ONLY sent when a channel first sees the power turn on in that channel. Caveat- also needs the electronics of the TIU powered and ready to sense that power on event to be able to send the watchdog.

I don't claim to know everything about the internal structure of the new WTIU- but what I do know is it takes time for the processor and operating system (similar to the WIU structure) to boot up from first getting power via the power adapter. I don't know if there is a secondary microprocessor involved that is the "TIU" portion of WTIU, such that it can boot rapidly and send a watchdog before the WIU portion completes booting up- which again takes significant time.

So again, what I don't know is your entire scenario. Lets say you have a power strip, and that power strip is what you use to power on your system at the beginning of a session. Let's also say you are using track power transformers that turn on track power- as soon as you turn on that power strip. The old scenario of a TIU +WIU, the WIU could still be booting up but the TIU and it's processor boot within seconds of power on- so it could send out a watchdog.

Let's say you replaced all that with the new WTIU and it's power supply is plugged into the same power strip. You walk in, turn on the power strip, your transformers apply power to the track inputs, at the same time the WTIU just got power from the power adapter and possibly still booting up. This could allow track power out to the track and yet the WTIU was not even ready to send a watchdog.

Bottom line, we need a lot more details of how exactly your setup is powered and wired, is the WTIU fully powered first and booted up (it's power adapter in a constant on outlet)? When and how are you turning on track power and what source (transformers)?

If I recollect correctly from my testing, when you power the WTIU up, it will not pass power from the inputs to the outputs until the device is fully booted up.

So if you use bricks to power the Fixed inputs and power everything on with the flip of one switch. The watchdog shouldn't be an issue.

However, if someone runs in passive mode, then there could be a problem with track power being applied and the WTIU not ready to send a watchdog.

@H1000 is correct. I power up two power strips one right after the other. (Same as I did for the TIU/WIU) So what I mean is that the track power and WTIU Power are on within seconds of each other, but the WTIU "clicks" on the track power after it boots. I know this because I can hear it click, and I have LED power indicators on my track loops that come on a few minutes after I turn on the power strips and the WTIU boots up. BUT, PS3 engines start up in conventional when the track power comes on. YES, I have all settings on the WTIU set to Fixed and DCS signal ON. So I am at a loss. Only thing I can try is conventional reset as I mentioned. I have not tried this yet. Wil I have to do this all the time, seems odd.

Mike

Add Reply

Post
The DCS Forum is sponsored by
×
×
×
×
Link copied to your clipboard.
×
×