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Controller Temp - Samba 43


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Hey,

I tried to get the controller temp on Samba 43.
it seems that it cannot set SB14 as HIGH, and therefore can't get any result on SI14.
looks like the model doesn't support it, but no info on it in the Docs.

Any special ways to make it work ?

Regards
Yam

 

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Samba 43 is a simplified version of V430.

You do not post samba model.

If model # end with TA RA or TRA - you can configure analog input as termocouple and short temperature input via wire (no sensor needed) - PLC in configured MI show temperature from embedded compensation temprature sensor.

You can also read this useful topic

 

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Kratmel,
your method can only work on  the  thermocouple dedicated ports ?
if yes, then it won't work for me, I want it to be available for future use.
in that case, I'm better off using a simple temp sensor that can work on any analog input.

This should be added to the docs of Visilogic, since it says that only V120/130/350 doesn’t support it.

 
  

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1 hour ago, yyh2 said:

if yes, then it won't work for me, I want it to be available for future use.

You can read about my experimental result in quoted topic ---

.... if we sw ON any of TC input  in SI15 appear temperature readings from internal TC cold junction sensor.

I try different combination - if any onboard TC sensor is activated - SI15 show temperature in 0.1C (I tried to serve hot and cold air - the reaction is adequate).

If no TC is active - SI15=0....

 

Then now you can try to activate any TC input  ( without sensor) and use SI15 for internal temperature readout. It is undocumented but i test it on real V130-33-RA22.

I think that in Samba there is the same scheme of compensation for TC. If in future you need to use TC - no changes needed.

 

1 hour ago, yyh2 said:

I'm better off using a simple temp sensor that can work on any analog input.

It is simple solution. But you ask about

16 hours ago, yyh2 said:

the controller temp on Samba 43.

 

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Ok, I get it now.
I will be able to try it later at the site as a temporary solution.
Currently I'm using a pt100 so no TC are switched on, I suppose it doesn’t work with the pt100 setting since there is no need for temp compensation.

Another related question – what would be considered an "OK" PCB temp for this model ?
The spec state an environment of up to 50 C (122F), which means a max pcb temp of ?

it is installed in a ventilated industrial oven electric cabinet and I suspect 50c is definitely an option.
better safe than sorry.

Thanks
Yam

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Well, you're right kratmel.
Thank you.

I've set analog input 2 as TC-K and gave it an MI.
SI15 started to show temp with a decimal point.
the MI shows just max range reading since nothing is attached to it.

Still waiting for the max temp data,  if anyone knows it.

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1. SB14/SI14 (for PLC models with internal sensor) show internal temperature on PCB near CPU.

2. Cold Junction sensor show temperature (SI15) of terminal connector where it is installed.

3. Internal enclosure temperature is dependent of internal air circulation tupe (matural air flow or fan), and from place you install temperature sensor.

 

Data sheet always show external to PLC temperature with natural air flow.

So please distinguish all temperatures.

 

In most of cases temperature is measured in selected point of enclosure, where it may be maximal.

You can use SB14 and/or SB15 for reference, as both are not referenced in documentation.

 

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OK Alex, thank you.

I'm currently getting 44C  at SI15 at max power.
the cabinet is vented by a fan blowing near the controller.
I think that's reasonable.
I will get in touch with unitronics support about the temp ranges.

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