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MC43 low side pulled up

Petit 3 years ago in Master modules / MC4x updated 3 years ago 6

Hi all,

I'm currently testing an MC43 on our HIL bench and notice some issue with the low side driver at startup.

On our system, all the low side driver of the MC43 at pulled up to supply voltage with a 10K pull up resistor.

The problem is that when we switch on the ECU, it's going into error with the code 4:2.

We find out that by waiting 1.5 sec at startup before pulling up the low side driver fix the problem. 

The problem is that on the vehicle we will probably end up in this situation as some low side driver are going to be pulled up throw some relay coil. 

Is the unit is going into error if any low side driver is pulled up or only some of them trigger it ?

Thanks for your support,

Grégoire

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VREF error on XC43 Enable

jolynik 3 years ago in Expansion modules / XC4x updated 3 years ago 10

Working on a project in which 2 XC43 modules are not supplied with power until the MD4 commands a safety relay contactor closed.

I've worked through almost all the bugs, but I'm getting a VREF A error as soon as the XC43 modules enable. I've tried leaving up to a 30 second delay after powering the XC43 modules to enable them, but the error still pops up for one cycle and then shows up on screen (Watching in a measure group, VREF starts at 0V for one or so cycles, then goes right to 5V). All the sensors read fine, just have the error at system start.


Is there any way to delay how long it takes for the VREF error to show

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Industrial Style IQAN Module for Electrical Cabinet

Barnhart Crane 4 years ago updated 4 years ago 1

We've used IQAN modules extensively in our equipment and we've always mounted the modules in an electrical cabinet. We prefer the entire IQAN system to other PLCs that would normally be used in a cabinet, but we could really benefit from an IQAN module that was more industrial style, i.e. that it would have screw terminals that were easy to rearrange, add, remove, etc.

Has anything like this been considered before? Anyone else with this need?

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Reading thermistors on MC43

Cole Koster 4 years ago in Master modules / MC4x updated by anonymous 2 years ago 3

I am trying to read a NTC thermistor with a resistive output ranging from 810 - 76.9 ohms on the MC43. 


In the past we have used a voltage divider circuit to read the sensor value on a VIN channel, but if the MC43 could introduce a bias current to the thermistor then the output voltage could read without the need for a second resistor in the mix. 


I did not seeing any mention of this in the MC43 manual but was wondering if anyone has faced this challenge before. 

Thank you. 

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Answered

IQAN-MG units product no. 5010001

AKRAM BOUBAKER 4 years ago updated by CEDRIC 3 years ago 6

Could you advise if there is a replacement for the 5010001 ?

I have a defective module on my   SMV SC4542 TA5 and I can not find a replcement

could you assist me ?

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Completed

Touchscreen issues

Ethan Zeman 4 years ago in Master modules / MD4 updated 4 years ago 6
I have seen increased reports of customers who have had to replace MD4s due to failed touchscreens.  The MD4 will still work fine but the touchscreen will quit responding.  I've had a few returned for review and it almost seems like the screen is delaminating (see attached photo)?

Most have occurred after several years of operation so not particularly early hour failures, but I would still expect a longer life from a touchscreen (my phone for example gets much more use and abuse).

Just wanted to put this out to see if others are seeing the same issue or if Parker is aware and has made any improvements to the screen over the years?

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Answered

PWM MR Values

BLC 4 years ago updated by Gustav Widén (System support) 4 years ago 2

I am trying to control a valve without over speeding the pump. What would the MR values need to be? Does 100% command at a 100% Max MR value equate to the source voltage, in this case 24VDC? See coil characteristics below. 

Image 2174

Answer

If you have an important function like this you should not use PWM outputs from IQAN, you should use COUT. The PWM outputs from IQAN are not temperature compensated and you will see consistency / repeatability problems. When you use the current output channels with IQAN you will be able to set minimum and maximum current requirements easily and the current will compensate for changes in coil resistance.

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Answered

Address tags

jimyd31 4 years ago updated by Steve Liljestrand 4 years ago 2

Hi all.

I'm looking to obtain a set of id tags. I'm only looking to run 5 modules. Is there a way to just buy a set of singe tags0-7  without having to buy box's of 10 of each that I will never use?

Thanks

James

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Answered

PWM to control small load

mtanguay 4 years ago in Master modules / MC4x updated by Gustav Widén (System support) 4 years ago 1

Hello,

We are currently working with a MC43, and I had a question regarding the use of PWM out as a control device. I found this post, since it was 4 years old thought I would ask again. We are trying to control a water valve position with one of the PWM out on the MC43, but not getting the expected results. 

The datasheet specifies a leakage current of 2mA. What do you recommend to clean this up and bring it down close to 0?

I am relatively new to the whole IQAN infrastructure and I am wondering why is there such a high leakage current? Is there any benefit to it?

Thanks in advance