M4 Safe Mode
I have a customer who attempted to move the location of an MD4 and in rewiring has got the wiring wrong! The screen will not now complete its boot up cycle and the diagnostics bus is not available to try to interrogate the machine.
There seems to be a tiny recessed red button alongside one of the screws on the rear of the screen - is this a safe mode button?
Closed Loop Control with Voltage Outputs
I have a system that includes a dc motor, a dc motor controller, an MD3 master and XA2 expansion modules.
My overall objective is to control the output speed of the motor, through the motor controller, via closed loop PID control with the MD3 and one of the XA2 modules. The motor controller can accept a 0-10Vdc signal to regulate the speed of the motor.
Assuming I can monitor the rotation speed of the motor's output shaft via a frequency input or voltage input into the XA2 module but am uncertain of how I can output the 0-10Vdc output signal to the motor controller from the XA2 module, any ideas?
Thanks, much appreciated.
MDL stored parameters reseting to default intermittently
A customer contacted me to report that intermittently (3 times over the past 8 months) the stored parameters in their MDL2 reset to factory default. The machine had been operating for two year without incident before this began occurring,
When this happens, the site maintenance personnel then have to run calibrations, and enable various functions that have reset to default to match the program back up with their particular machine configuration. After adjusting everything the machine will run as normal for several months until it happens again.
Are there external factors that could cause this behavior or could this be an indication of an internal failure?
PWM Input
I have an application that requires using a PWM input to control the brightness of a MD4 5 inch non-touch display. The input is to be wired on C4:1 of a XC21 module. The input runs at a duty cycle of 10-90%.
Unfortunately for me, this is an optional input on the overall system. It is possible, that the PWM input is not available. If this is the case, the brightness would be controlled by a discrete switch.
My plan was to monitor the PWM input value, and if the PWM input was 100%, then I would go to a predefined brightness. If the PWM input was 0%, then I would go to a different predefined brightness. Any value between 10% and 90%, I would have the brightness of the MD4 set to the PWM value. As I see it now, I am not able to set the PWM input value to read from 0-100%. The default values for these types of inputs are 5-95%, and I can adjust them to cover 1-99%. This would be fine if the input was always a PWM type, but if the vehicle does not have this optional switch, then my PWM value would be 0% or 100%.
Is there anyway that I would be able to accomplish this, without have to make an adjust item?
Wrong IdTag! Error on MD4
On two separate machines now (with identical systems) we have received customer reports of an issue of the IQAN system stopping functioning during machine operation.
On the MD4, the screen will say STOP System Message: IQAN-Master Wrong IdTag! system
I have been told that power cycling will not fix the issue. The only way to resolve is to unplug the Deutsch connector from the back of the MD4 and then plug it back in.
This is an intermittent issue. The machines can run 100+ hours before the issue repeats.
The customer was advised to check resistance on the ID Tag (resistance was correct) and to check the pins and wiring condition at the MD4 for any anomalies or corrosion (nothing identified).
Do you have any guidance on this issue?
Is there a chart of the master and slave controllers that I can use as a quick reference for making my own?
Battery for MD4
I think that inlcuding an internal battery would be interesting in order to maintain RTC values.
Thanks.
fantastic display
MD4 problems when backlight is 70% or above.
If you adjust backlight in the MD4 higher then 70% the screen brightness gets unstable starts vary in brightness up and down.
VREF Error
First of all, I'm very happy to see this online community, We have been needing an IQAN development/troubleshooting/idea-sharing place for a while, and I'm happy to be a part of it,
My question is:
What exactly does a "VREF Error" message mean when it is not associated with an input channel? We have a MD3 connected to 2 XA2 modules. Intermittently, a system message will display that reads: "XA2.0 VREF Error 2.2V"
The system runs on 24VDC.
What conditions could possibly cause the VREF on an XA2 module to dip so low? Again, the VREF error is not indicated as being associated with any particular input -- just an XA2 module. If the system/battery voltage drops low, does the reference voltage regulator have trouble maintaining 5 volts? Wouldn't the system just shut off before that happens?
Has anyone experienced this before?
Thanks!
Customer support service by UserEcho
