V570-57T20-J +V200-18E3XB analog inputs freesing.

[ZebioEE]

The device start to go to alarm and after checking I noted what all analog  values from V200-18E3XB  freezing , update analog  values  in 30 seconds  to 1 minutes.

Normally  analog values updated many times per second.

What can be reason? Is it possible summer hot temperature ?  when PLC power off for 5 min it start working 3min then again freesing.

[kratmel]

Please check power supply voltage (after power off and when analog value freezing) .

If it possible temporary change E3XB for test.

If not possible - try to remove and install V200-18E3XB - sometimes connection lost in connector.  

[Gabriel Franco]

I had a similar problem some time ago and was due to excessive temperature inside the cabinet which affected only AI of snap-in

Solution: improve heat dissipation.

[ZebioEE]

On 8/15/2024 at 4:06 PM, kratmel said:

Please check power supply voltage (after power off and when analog value freezing) .

If it possible temporary change E3XB for test.

If not possible - try to remove and install V200-18E3XB - sometimes connection lost in connector.  

Trying but not help, thanks for reply.

[ZebioEE]

On 8/16/2024 at 2:03 AM, Gabriel Franco said:

I had a similar problem some time ago and was due to excessive temperature inside the cabinet which affected only AI of snap-in

Solution: improve heat dissipation.

Module datasheet : Operating temperature  0° to 45°C (32° to 113°F)

Actual ambient is 30°C  itself module is quite hot.

[Ausman]

13 hours ago, ZebioEE said:

Actual ambient is 30°C  itself module is quite hot.

Measure the module temp with an IR. 

As per Gabriel's suggestion, fit a small 24v (computer style) fan into the enclosure to blow directly onto the module, to disperse/distribute the heat better.  But keep it as far away from the module as possible to limit electrical noise interference.  Not hard to temporarily rig something up.  See what happens after doing so.  Your enclosure may need more than it's existing innate heat transfer abilities.

FYI,  You've checked the mounting of the snap-in, but add some mechanical assistance to retain it better....like tapes along seams or appropriately placed small screws.  This is a commonly discussed thing on the forum due to the way the standard snap-in mounting method works ok, but slight "unclipping" over time can create connection issues.  Hence Kratmel's comment about "connection issues".

cheers, Aus