We noticed that we are getting the errors below in the MC43 log occasionally and it appears to get logged when turning machine off.  Machine runs fine and no errors appear during running.  I verified that the log has no errors during running, but when I key off and then key on and check MC43 log, the errors below are logged in MC43 log.

Any ideas as to why these errors would get logged on key off intermittently?  Any suggestions as to resolve this?

Quick question on fuel senders.

The kind we have included with our fuel tank is in fact not a current out, but resistive fuel sender. That is, 1 terminal is connected to ground and 1 terminal is the signal wire with varying resistance based on fuel level.

Is there any way that the MC43 can read this?

We are having some odd things happening with a system designed using DOUT HS + LS outputs.

We will start with the first group circled in Red below, but are having the same issues with the other HS + LS groups. You can also reference the schematic below for the HS + LS wiring for “Servo Power” and Front “Diff Lock”. This is with "DOUT under current detection" on.

• If Servo Power and Front Diff Lock both are False and we disconnect one or the other, the corresponding function will show “open load” as expected.
• If Servo Power is True and Front Diff Lock is False, and we disconnect either one, the corresponding function will show “open load” as expected.
• If Servo Power is False and Front Diff Lock is True and we disconnect Servo Power, no “open load” is shown
• If Servo Power is False and Front Diff Lock is True and we disconnect Front Diff Lock, both show “open load”
• If Servo Power is True and Front Diff Lock is True and we disconnect either one, no “open load” is shown

If we turn "DOUT under current detection" off, the outputs will behave how we understand they are supposed to. Although, doing so removes open load detection when the output is true. 

The instruction book recommends NOT using an MC4x for 33/75 hz Pulsar coils.

I have an application where we are using an MC43 driving PF coils, and the customer is asking for a retrofit to 75hz pulsars, for common coils with other equipment.    Is it possible to add external diodes/etc and drive these coils, or will we have to replace the controller?

What are the group numbers for these outputs? The manual doesn't list them in appendix A?

Hello,

This happens in a system with just an MC43, and no other connection than Ethernet.

Same hardware and software without problems on previous machines.

After successfully sent the project to the system (through Ethernet, and from IQAN Run or from IQAN Design ), when trying to go online the following screen appears:

(from IQANDesign 5 Latest version, after trying to go online)

(from IQANRun 5.01, after trying to get system info,or enter Adjust, or whatever)

It seems the module lights blink the following way:

4xRed,

2xYellow + 2xYellow + 1xYellow + 3xYellow

All short blinks...probably.

Any hint?

Thanks a lot.

The installation manual states an example for a 2 wire 0-20mA input into the controller, but there is no reference to a 3 wire input. Are these supported? I'm assuming it will be the same connections just the sensor ground (which does not include the signal) will go to chassis or vref -ve? Can anyone confirm?

where on the MC41 I connect LED lamp and how is it controlled it via the program

Has anyone had any experience whereby they have used a single IQAN PWM out with a 5A load ?  The data sheets say "no" but I am just wondering if this is possible if the number of outputs used simultaneously, is controlled.

I have a MC41 setup where I need to use a bidirectionnal CAM output in PWM mode to drive a bidirectional valve (2 coils). There is a mention to not use a flyback diode in closed loop control but is it ok to add diodes on coils if the outputs are used in PWM mode, not in current output? I tried it and it seems to work just fine.

I want to add diodes as there will be an emergency operation switch installed to directly power the coils. We want the diodes to prevent high voltage spikes to the MC41 module and the switches.

Found on the forum:

With IQAN-MC3 and IQAN-MC43, -MC42 and -MC41, the internal clamping diode is not disconnected when COUT pins are used as open control PWM.

Does that mean that we do not need to add diodes?