Micrologix IO cards Error

Holmux

Lifetime Supporting Member
Join Date
Oct 2013
Location
Aalborg
Posts
279
Hi

I have a Micrologix 1400 with some external IO cards, the costumer complains about failing IO cards, especially the Analog Output card is replaced often (once every 18 months) I haven't worked that much with the Micrologix, so I don't know if there is any special things to look for.

Temperature and external power supply looks OK

Are the Micrologix external IO especially sensitive ?

Any input would be great

Thanks
/Holmux
 
They're generally pretty reliable but they do fail now and then. Like after 10 years or so. If he's got consistently failing cards I would check to make sure there's not some terrible noise or 240VAC riding on the DC bus or some other shenanigans.
 
I think you are right, I am also leaning against quality a power source problem.

Well I have been looking a bit on the setup, there is a lot of static electricity going around in the operation, so I will start with measuring the quality of the power and ground going true this cabinet.

That means I will need to go and get me some new tools, I have been looking for an excuse to get my self a portable oscilloscope for a long time, Christmas came early this year :)
 
We had a couple panels where analog input values and output levels would randomly freeze until a power cycle. The Flex IO racks were mounted to aluminum rail. None of the ground tabs on the module bases or the ASB pierced the oxide layer on the rail to actually be grounded. A switch to steel rail resolved the problem.
 

Similar Topics

I am trying to 'standardize' several HVAC units running micrologix 1400. My question: Can I 'leave out' IO cards in the IO map below or do I...
Replies
4
Views
1,505
Hey Everyone, We have a Micrologix 1400 (1766-L32BXB) with a Panelview 800 7" Screen, the Micrologix also has a 1762-IQ16 Input Card and a...
Replies
2
Views
1,267
I am currently backing a Micro Logix 1100 and no-one seems to have the file for me to upload from. Is there a way for me to upload the project off...
Replies
15
Views
337
Hi, I am working with a Micrologix 1400 model 1766-L32BXB. With no input wires connected to the “in12” thru “in19”, I am getting 24 volts while...
Replies
4
Views
172
I am trying to set up a read message in a MicroLogix1100 to read the value of a DINT in a ControlLogix5561. I have successfully set up a message...
Replies
2
Views
162
Back
Top Bottom