Newport NPC DIG Series, Инструкция по эксплуатации, Страница: 32 / 34

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11 Troubleshooting
Please check all cables and connections first if the system is not working properly.
error possible solution
UDL/OVL-LED blinks Check the connection between actuator and amplifier.
Check the actuator cable for damage.
UDL/OVL-LED light up
in closed loop mode The actuator is not able to reach the commanded position.
Check the modulation input and offset.
Check your actuator for mechanical blocking.
Check whether your actuators move properly in open loop mode.
actuator oscillates in
resonant frequency in
closed loop Check the PID-controller adjustments, reduce the ki-value,
Reduce the kd-value.
Check whether the function generator is still working.
read back parameters always
deviate at the same level from
the digital target value
Please switch off the analog modulation input when it’s not used.
Command:
modon,0 (see 8.4.2 commands). External signals can cause an
interference or a command value offset.
actuator does not move in
spite of the applied analog
modulation signal on the
MOD input Please switch on the analog modulation input by using command
modon,1 (see 8.4.2 commands).
interface output values do not
correspond to the applied
signal value Aliasing: If the signal read out sequence is lower than half of the
working frequency only the serial data is affected. The real motion
values are not affected.
table 11: errors