Hi, I have an issue with intermittent MC43 COUT overload errors on one of our machines.

Status is OK and operates well in most conditions, but will randomly report overload (even when that function is not requested).

I have tested the solenoids, plugs, and wiring harnesses within this circuit and all looks ok.

COUT circuit C1:16, 41, 57.

Is there anything else I should check to see what might be going wrong?

Hydraulkompaniet in Sweden have put together a plug-n-play solution for replacing LM3D joysticks. No software update or wire harness modification is necessary in the machine. Just install the connectors and the LC6 with the mounting adapters. 

Its possible to use the 4th axis of the two LC6 joysticks to control extra functions on the machine to even add more value to this conversion. The MC41 have 2xCOUT that will be used in this case, the externa supply needs to be connectet if COUT is used. 

Link to the kit in our webshop:

https://www.hkhydraulic.com/styrsystem-elektronik/spakar-vippor-knappar/minispakar/lm3dkomverteringlc6

Installation Guide:

Does anyone have information about the MDL C2 connector and connections?

Because programming cable 5030110 is no longer available, I have to make this cable myself.

We have a machine that has sporadic nuisance open load errors on a function controlled by a unidirectional current output (COUT-G) on an MC43. Since this happens with some frequency, I suspect we are right up against the limit of the open load detection threshold. They test out well in assembly, but any increase in resistance occurring in the field might be setting it over the edge of the error threshold.

How can I calculate at what load resistance, commanded current, and supply voltage an open load error will occur?

This function is controlled with a Parker CCP024H 1/2" super coil with nominal resistance at room temperature of 30.30 ohms. Machine runs on 24V (around 28V when alternator charging). Maximum commanded current is set to 600mA.

Are the current out channels on an MC43 suitable for dishing out a 4-20 ma signal? It would be controlling a VFD.

I know the current out channels are typically used to control valves and used in the hundreds of milliamp range. 

We are using a MC43 and using PWM and COUT channels. What we have noticed is when a PWM HS output is shorted to ground, one of our COUT outputs goes into overload. In our case, C2:51 was shorted to ground but C2:67/C2:15 had the overload error. 

We are experiencing a problem with the HS+LS outputs on an XC44 module connected to an MC43 as the master running IQAN 6.07. Pin C1:46 as the HS and pin C1:41 as the LS.

The outputs are being used to activate a solenoid. The circuit was wired to run through a relay latched by system estop, with a diode placed across the solenoid to protect the outputs as in the documentation.

This circuit is able to latch and unlatch the solenoid with no problems, and this was repeatable many times. However when the system estop is pressed for the first time and the relay unlatches and breaks the circuit there is no error. When the relay is energized and the circuit is connected again, when the output is turned on a message is displayed reporting that the LS pin is overloaded. This message then triggers on either side of the estop from that point on. Key cycle is able to "reset" to the first estop cycle. This behavior happened ~9/10 times the cycle was repeated. There were some occasions where the error did not trigger.

The overcurrent error will only trigger when the output is requested, the estop relay can be re-energized connecting the circuit and no overcurrent is reported. 

Current measurements were taken on the HS+LS wire to investigate. The current on this wire never approaches or exceeds the listed 2.5A. This is the only load on that pin grouping, the other 3 LS pins were not used.

 Current_results.pdf

What might be causing MD4-10 screen to go white.

We have been told by our distributor here in the UK that all hardware (displays, master modules, expansions etc) are on minimum 12-14 week delivery time. Is this likely to improve any time soon?

Minimum of 3 months delivery for a component if we have one fail on a machine seems a very long time to wait!

Hello,

We are designing our last machines with XC42 instead the phase-out XC10 and we are experiencing some issues.

One of them is related with the activation of some Inverter (Euradrives) and Soft Starters (ABB) digital inputs.

When the DOUT HS is directly connected to those high impedance inputs and the output is OFF, surely due to the leakage current, the Inverter and the Soft Starter interpret it as ON state, so they run untimely!

It is possible to reproduce this just wiring a DOUT HS to a DIN PD, the input will be ON all the time, even when the DOUT is OFF:

Also, when the inpedance is very high (not with XC42 DIN PD in this case), the DOUT HS is ON, the Open load error appears due to low consumption of the high impedance inputs, and this checking cannot be disabled in the IQAN...

We thought to add and extra resistor in parallel to the high impedance input to avoid this error, but we don't like this "solution", it can be really dangerous because if the resistor is broken or loosen, the devices will be running untimely!!

Our only solution was to add 24Vdc relays in the HS outputs and wire the contact of the relay to the high impedance inputs.

We think that the best solution would be the possibility of disabbling this leakage current for Open load ckeching in the DOUT HS. Is there any possibility of implanting it in future releases?

Thanks for your help and best regards,

Adolfo