Problem with WS-8-150-DC

[beeman]

No figure in either power down or power up. Just Warning Voltage which was 10.5v then I raised it to 11v Still too low to send out meaningful time for us to change batteries. If you look above, we had a low voltage warning (11v) and then 10 minutes later it shut down

[sirhc]

OK we have an issue where if you upgrade to v1.4.7r5 or newer for the WS-8-150-DC it messes up the Power TAB.

Below is the power Tab for the WS-8-150-DC in v1.4.7rc4 and older firmware which is correct.

Below is a picture of a WS-8-150-DC Power TAB that is simply WRONG with v1.4.7rc5-rc7

I am posting up v1.4.7rc8 shortly to fix this.

We also came across a problem that can occur with the WS-8-150-DC if you allow the battery bank to drop to 9V where the switch would shut down but then the battery voltage will jump up above 9V and cause the switch to then immediately boot again. As soon as the WS-8-150-DC boots the voltage again drops below 9V and the switch shuts down and a loop is created.

The WS-8-150-DC was created to be a less expensive alternative to the more fully featured WS-12-250-DC which employs a separate microprocessor to control the DC power plant. The WS-12-250-DC will not allow the switch to power up until the voltage from the battery bank is at least 1V higher than the hibernate voltage.

However if you are only running a single battery with the WS-12-250-DC it is recommended you set the wakeup voltage to at least 2V above the hibernate voltage to prevent a possible boot loop.

With the new v1.4.7rc8 firmware we are putting in a minimum input voltage requirement of 9.5V to allow POE on any port. If the input voltage drops below 9.5V the switch will power off the POE port and not power it back on until voltage is at least 10.5V to prevent this rapid up down condition that could cause the switch to boot improperly.

But as I stated above anyone using a WS-12-250-DC unit with a single battery should always make sure the wakeup voltage is at least 2V above the hibernate voltage to avoid possible issues because with a single battery the voltage swing could be much higher than 1V when the switch disengages from the battery when it enters hibernate mode and battery consumption drops below .1 watts.

[mbenn10102]

Hello,

I don't think I have any DC versions of that switch. Just AC.

Does it affect AC as well?

Matt.

[aistech]

Thank you.

[sirhc]

Hello,

I don't think I have any DC versions of that switch. Just AC.

Does it affect AC as well?

Matt.

No

[comtecoz]

Thanks , any idea when the firmware will be updated and released :) , we are about to deploy 6 off them @ remote sites , they are still at our workshop being configured at moment

Cheers from Oz


gary

[sirhc]

I already posted v1.4.7rc8 hours ago

[beeman]

Thanks -I've upgraded to v1.4.7rc8. Its not altered my power tab much (as posted before) BUT put in 'default' figures for Power Down /Power up

[pcourtney]

Beerman, we use MPPT Solar Charge Controllers, you may find that MPPT will help with your 12V setup :-)

http://www.windandsun.co.uk/media/38377 ... epaper.pdf


also what make/model batteries are you using ?

[michaeln416]

I have a WS-8-150-DC and run it at 24v directly from batteries which are solar charged. I'd like to know what the Hibernate and Wake-Up voltages are set to? I'm not able to configure or even see these values in the Power Tab like I can with my WS-12-250-DC units.

I have my Warning Voltage set to 22.5 volts, but I have no idea when it cuts out and when it comes back on.