Troubleshooting
02.00 | FMS | Assembly and Operating Manual | en | 389074
19
7 Troubleshooting
Malfunctions
Possible cause
Corrective action
Replace display.
Voltage is missing or
its polarity is
incorrect or it is out
of the permitted
range.
Connecting the voltage correctly:
18 – 30 V (yellow = + 24 VDC; gray = 0 VDC)
The value in the
display does not
change when the
measuring jaws are
loaded
Measuring jaws not
connected to force/
torque sensor
system controller.
Insert the connection plug of the measuring
jaw in the force/torque sensor system
controller.
The measuring jaws
are not loaded in the
direction of the jaw
movement.
The system measures only forces in the
direction of the jaw movement. Only the
gripping forces are to be measured; for this
purpose, the other forces are largely hidden.
The measured value
fluctuates slightly
The air supply is not
uniform.
Ensure constant pressure.
Vibrations or
external forces are
occurring.
Hold the gripper steady.
The measured value
»flows«
Determined by the
system
When forces are constantly present, there is a
slight flow of the material particularly in the
upper part of the measurement range. This
effect can be seen in the output voltage and is
normal.
The measured value
shown on the
display differs from
the analog signal
Resolution of the
display
To optimize costs, a simple display unit is
installed. The exact value is the voltage at the
output.
The shield has not
been applied.
The shield must be connected for error-free
transmission of the measured value to the
analog input. Only in this way are the EMC
rules observed.
The analog input
card is not set
correctly.
The analog input card should have an input of
–5 V to +5 V. Set the card correctly.
Other errors
Please inform SCHUNK.