I just had an error show up on my MD3 today which says New MD3 VREF error. Value 0.5V

Hi ! 

One of my OEM wants to drive SAUER 90R075KAS (servo EDC, 14-85 mA) with one current output with our IQAN MC43FS. 

I know that the mC43FS has a new functionnality , but I am not sure for this kind of current…. ! Please feel free to contact me if you have one solution…. Best regards. 

I am trying to design a system with redundant MC43s controlling the same components on their COUTs and DOUTs. Only one module would output at a time. Could this be accomplished without using relays? Can Diodes be used to prevent one backfeeding into the other? What is your suggestion?

We have a customer that is experiencing graphical errors with an MD4. S/N 1535280044. Customer is complaining that the display sometimes is black, sometimes white and sometimes multicoloured lines:

Does anyone know why this could be happening? It appears to be happening sometimes at startup, but also when machine is running (randomly dropping out). Im not sure if its the hardware issue that was changed a couple of years ago on the MD4?

I was told some months ago, the the MD3 would be obsoleted sooner rather than later, but I have not seen anything further on this.

Any idea how far out is the timeline on obsoleting the MD3?

I am using an IFM Efector 4-20mA 2 wire sensor on the MC41 inputs capable of sensing current.  Their hookup diagram is what I expected connecting one side of the sensor to high and one side to the sensor port.  The input shows a high error when I'm in a neutral state and I can confirm with an ammeter in line that I am sending 4mA to the controller.  My best guess is there is too much impedance and internally it is not correcting for it so I tried adding a 5k resistor to ground externally to split the current.  It now senses 3.8mA but is no longer accurate over the range.  

We have an application which uses MC43FS module. We get an error code showing 4 x red, 2 x amber, 1 x amber, 1 x amber, 4 x amber. I have isolated the fault to one wire which is causing this error code, C1:10. The manual shows this as VIN / DIN, but we have found when connecting 24V to this pin once the module is booted, all is fine, no error code is generated. If we connect 24V to this pin and power the module on we get the error code flash up, the module shuts down, no communication is possible.

I have used a different MC43 to test and same error is generated. I have also tested by only connecting power, address tag and C1:10 and I still get the same error with the scenarios listed above. Is this a fault or is there something we are doing wrong (perhaps the allocation of pins)? Its almost as if the pin should only be a VIN and only accept 5VDC max, or perhaps its a pull up instead of pull down, is this what the error code is stating? We are unable to tell what the detailed error code is, only 'stopped critical' is listed. I will send across the video file of the error flash.

I have multiple MD4-7 low side output permanently latching off when it is driving a relay after a month or 2. Over the course of 2 years this seems to only be happening on the last few units I received, but not on any of the older ones. The current maximum on the output is 300ma and the relay I'm driving has a maximum inrush of 350ma for less than 1us, and it has a built in surge protection suppressor diode... I would normally say ugh I should have been more careful but I have quite a bit of units with all the same relays driving off of the same outputs without problems. has there been any component changes in the past couple months to these units? Anyone else have any thoughts on what might be happening? 

Hi there!

I've got a small problem and i had this before but it went away every time but i dont know how to fix my problem

if i start up my MD4-5 it shows our own startup screen (this is good) and then, after the startup, it shows an error message:

and it stays in this screen.

I've connected the Bat+ to 24V bat- to the ground and the RTC to the 24V with a 1.5K resistor.

is there any reason why this could happen?

Theleo De Bruyn

Hi there,

I have been working on the project that would involve MC41 master. Application that I have been working requires 8 digital outputs. MC41 has got 4 DOUTs and 2 bidirectional COUTs (current out). In the past I used XA2 that allowed to use these COUTs for DOUTs. It was clearly shown on electrical schematic. When I have checked electrical schematic for MC41 it did not show this option. Can I use these COUTs for additional DOUTs that I require or what can be suggested to achieve my requirement. I would like to add that I am rather 'mechanical' guy and have some problems with electronics. Have been working with IQAN since 2007.

Thanks in advance

Richard Kowalczyk 

 RKad Engineering

32 Kingussie Ave Castle Hill NSW 2154 Australia 

 ☎: +61 2 98940750

📲 :+61 431 639 295

E: richard.kowalczyk@rkad.com.au 

W: www.rkad.com.au