Hi,

I have several issue comes from a customer who run MD4/MC31 multimaster system.

They have MD4 who are not anymore able to keep the RTC.

To be sure, I took a kit apart and tested it myself. Finally, I move the MD4 alone and tried it with a very small program. Only value to show date/time/temp.

When it boot, the RTC is resetted and the temperature is OK (around 40 Celsius).

But when I update the date/time from iQanRun, the date and time appear to be OK, but the internal temp goes to -1C and give critical error.

I did a short video to show what I did and to show what's append.

https://youtu.be/npQr-87-FiY

Thanks!

There is some picture to complete:

We have just updated from IQAN 3.19 to IQAN 4.06.

We are now seeing over load errors on several solenoids being controlled with PWM out signals.

The overloads only occur when the outputs are off. When they are on (90% Duty cycle) the errors go away.

I believe I remember reading something about circuit failure detection being active even when outputs are off as part of an IQAN 4 update.

Any recommendations on how this could be resolved?

What is the reason for not being able to use diode protection on COUT's? The manual for the MC3 for example states 'Do not install diodes across the coils', just wondering why this is noted, is there a specific reason?

Also there are a selection of other methods of suppression, resistors etc. Can resistors be used? In terms of diode suppression, is the TVS diode not to be installed in the same way as say a standard diode is not to be used?

Does the MC43 have a Real Time Clock? Does it need one?

I am using IQAN design V3.19.7.4013. When I pressed F3+F4+Up buttons in MD3 same time, openning the main menu page. But I don't want this. This is a problem for me. What can I do for this.

You can see this problem the following video.

With the new MC42 and MC43 master modules, I see you have the ability to communicate via Ethernet communication port. Where can I find this part?

Hi

It will be possible use MC41 IQAN module as a slave?

How use MC41 and Panel MD3 together in same project?

Does the current consumption of the module (170mA @ 24V) increase if we start connecting sensors on the VREF pins or does this value include the max draw on both the VREF (140mA x 2)?

Does this apply to all master / expansion modules?

Is there a way of detecting how much current draw there is on the VREF supply on an MC3?

I have experimented with a SIL2 pressure transducer connected to an MD4 (don't have an MC3 to hand) and noticed that disconnecting the -VREF and leaving +5V supply and VIN signal wires connected to the controller will generate 2500mV signal into the MD4 VIN. This is not desirable as it simulates a pressure in the system which is not true. I can only imagine its how the internal electronic circuit is manufactured inside the transducer causing the false signal, but its not unique to one manufacture of pressure transducer. The current consumption of the sensor drops from 6mA to zero when the -VE is removed, wondered if this would be a good way to detect disconnected -VREF connection?

Aside from the method above or monitoring for a sudden change in VIN signal within the software, can anyone suggest any other solution to this issue?

One of our field units is getting the an "Error" on start-up. It occurs on every startup.

After the error is cleared, everything is working fine. The solenoid(s) showing the error function with no issue.

In the past we have seen open load and overload output errors but not just a generic error message. We replaced the MC3 module and the problem was resolved.

Just curious on what this means? Thanks