Troubleshooting; Table 14 Troubleshooting - Beckhoff CP39 Series Manual

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Troubleshooting

Table 14: Troubleshooting
Fault
No control panel function
Multi-touch screen does not react or
only reacts sporadically
USB error during access with
TwinCAT via USB
No picture/backlight
Beckhoff recommends using Beckhoff connection cables and connection kits.
CP39xx
Cause
Lack of power supply to the control
panel
Cable not connected
CP39xx-0010: no supply of power to
the CU880x
Poor or missing functional earth of
the device
Poor or missing ground connection of
the user
Cycle time in TwinCAT set to 10 ms
(standard)
Problem with the cable connections
Version: 3.6
Troubleshooting
Measures
Check the power supply cable
1. Correctly connect the cable
2. Call Beckhoff Service
Check the supply of power to
the CU880x
Check potential equalization
and grounding measures
Touch the control panel frame
and check the touch function at
the same time
Increase the cycle time to
between 50 ms and 80 ms
CP39xx-0000: check DVI cable
connection
CP39xx-0010:
1. Check the cable
connections
2. Check the CU880x
diagnostic LEDs
3. Check the power supply
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