7. MAINTENANCE & TROUBLESHOOTING
191
Vio over-voltage
Over-voltage will mean that the 24V supply is out of tolerance.
Indexed motion will be stopped instantly and the drive will then de-energise.
If there is a user program running and the fault label is armed it will be run.
Encoder/Auxiliary 5V under voltage
This 5V supply is read every 500uS. This fault is set if it dips below 4.5V.
Indexed motion will be stopped instantly and the drive will then de-energise.
If there is a user program running and the fault label is armed it will be run.
The firmware will not allow an energise whilst this fault is present.
Impending Power loss (24v – Logic supply)
This input is triggered when the 24V supply is removed. The indexer will shut down when
the 24V input drops below approximately 17.5V and will require a power cycle to recover.
At the moment that the impending power loss is detected, the following actions are taken:
Turn off interrupts (Drive will no longer communicate)
Turns off the power stage
Indicate indexer fault (STATUS LED = RED)
Loop forever until logic supply can no longer keep the micro alive.
If the logic supply is experiencing dips, then this may manifest itself as locked up comms. A
common mistake when running off 24V HV, is to wire HV and logic to the same power
supply. If an end stop is driven into, then the current drawn may be sufficient to collapse the
HV and hence the logic supply. The drive faults with impending power loss, and de-
energises the power stage, so the load is removed and the voltage recovers. The indexer
however, appears to have locked up but has actually gone into a sleep mode.
Motor Over Temperature
Indexed motion will be stopped in a controlled manner and the drive will then de-energise.
If there is a user program running and the fault label is armed it will be run.
Ambient over temperature
When the temperature trip point is reached :
Indexed motion will be stopped in a controlled manner and the drive will then de-energise.
If there is a user program running and the fault label is armed it will be run.
Drive over temperature
When the temperature trip point is reached :
Indexed motion will be stopped in a controlled manner and the drive will then de-energise.
If there is a user program running and the fault label is armed it will be run.
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