Freeze of the touch screen on MD4
We are using an MD3 and MD4 as screen on our system.
They print the same info from one CAN BUS
They are on the same system than a generator quite noisy, and when the generator start we loose the touch on the MD4, only the touch.
- The screen still work good
- the Md3 act normal
Did any body experiment the same kind of issue?
I don't have a scope on site I am investigating right now on the issue. I will try to
Power supply the MD4 from an other power source
Isolate the power suply if it doesn't work
I will try to add a capasitor if I have time.
Frequency input
Is it possible to use Frequency input to get the engine speed by using the W contact of the alternator?
G3 Modem
Is there any information available on this module yet? We are finding the G2 modem is quite sluggish when downloading software updates over GPRS especially with MD4 displays.
Best wire for CAN connections
We are looking at looming a machine where the data cores could be quite close to wiring used to power solenoid coils and some advise what type of cable to use would be good? Understandably we cannot change it easily so we need to make sure we get it right first time.
MC31
Thanks!
Voltage present when outputs are off
I have measured the voltage and current being drawn with the output off and its 1.3mA @ 5.8v. Is there any reason why we couldn't simply connect asuitable resistor in parallel with the siren to stop this sound being generated?
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?
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