Quote from: rickpend on October 06, 2016, 01:15:PM
What is Negative Slip F Alarm on a Parker AC Drive?

Here's what the manual says: Autotune has calculated a negative slip frequency, which is not valid. Nameplate rpm may have been set to a value higher than the base speed of the motor.

Check nameplate rpm, base frequency, and pole pairs are correct.

This seems like a calibration issue with the RPM setting, you'll need to look at this value and see where you have it set..

Quote from: rickpend on October 06, 2016, 01:16:PM
What is TR Too Large Alarm on a Parker AC Drive?

The manual says: The calculated value of rotor time constant is too large. Check the value of nameplate rpm.

It appears that you would have to check and update your calibration settings to clear this alarm and don't forget to save your chnages....

Quote from: rickpend on October 06, 2016, 01:18:PM
What is TR Too Small Alarm on a Parker AC Drive?

The manual says: The calculated value of rotor time constant is too small. Check the value of nameplate rpm.

It seems as though this fault can be cleared only after you have checked and adjusted your calibration values. Don't forget to save your changes...

Quote from: rickpend on October 06, 2016, 01:20:PM
What is Max RPM Data ERR Alarm on a Parker AC Drive?

Here's what the Parker manual says: This error is reported when the MAX SPEED RPM is set to a value outside the range for which Autotune has gathered data.

Autotune gathers data on the motor characteristics up to 30% beyond "max speed rpm". If MAX SPEED RPM is later increased beyond this range, the drive had no data for this new operating area, and so will report an error.

To run the motor beyond this point it is necessary to re-autotune with MAX SPEED RPM set to a higher value.

The clear this alarm forever, it looks like you would need to re-calibrate making appropriate adjustments to the max speed, and the redo the autoune after making your adjustments.

Quote from: rickpend on October 06, 2016, 01:21:PM
What is Stack Trip Alarm on a Parker AC Drive?

The manual says: The drive was unable to distinguish between an overcurrent/Dsat or overvoltage trip.

It seems as though the drive was overloaded in some way, so it looks like you would have to find the source of the overloading and go from there.

Quote from: rickpend on October 06, 2016, 02:32:PM
What is Leakge L Timeout Alarm on a Parker AC Drive?

Here's what the manual says: The leakage inductance measurement requires a test current to be inserted into the motor. It has not been possible to achieve the required level of current. Check that the motor is wired correctly.

It seems as though you would only see this message on a new installation, but it can also appear in the event of a motor wiring issue or an open motor winding. You will need to research your motor connections and continuity to clear this alarm.

Quote from: rickpend on October 06, 2016, 02:33:PM
What is Power Loss Stop Alarm on a Parker AC Drive?

The manual says: Power Loss Stop sequence has ramped Speed Setpoint to zero or timed out

I think just just means the drive experienced a power loss while it was running. As for clearing this message, you would most likely have to cycle the power to the drive and restart. I'm not sure if you if you can clear this message with the "E" button.

Quote from: rickpend on October 06, 2016, 02:35:PM
What is Motr Turning Err Alarm on a Parker AC Drive?

The manual says: The motor must be stationary when starting the Autotune

So to prevent this alarm you need to wait until the motor is completely stable before you start trying to do the autotune. Press the "E" button to acknowledge the alarm and try again.

Quote from: rickpend on October 06, 2016, 02:35:PM
What is Motr Stalled Err Alarm on a Parker AC Drive?

The manual says: The motor must be able to rotate during Autotune

So it seems you may have tried to autotune while the motor still has a load attached. You should physically disconnect the motor from its load.

Quote from: rickpend on October 06, 2016, 02:37:PM
What is Inverse Time Alarm on a Parker AC Drive?

The inverse time current limit is active:

1. motor loading is too great:
motor current >150% for 60s in Constant duty
motor current >110% for 60s in Quadratic duty

2. fixed or autoboost levels are too high

This is from the Parker troubleshooting guide...

As for clearing this alarm, you may need to investigate your loading or your calibration first, then try cycling the power to the drive.

QuoteWhat causes this?

Can I just leave this alone now or do you think that more of the inputs will start to go bad?

Also, are there internal fuses or anything I can repair, or should I replace the card?

You can leave the card where it is, just because one input went bad doesn't mean the entire PLC is going to fail. Depending on your specific case, you may want to order a replacement and set it on the shelf, or just let it go for now.

As for the cause, inputs can burn out due to voltage spikes or maybe an improper voltage being applied to it. I don't think there are any PLC manufacturers that advertise fused PLC inputs.

Hello gentleman,
I just joined up, hopefully we will see more action here soon. Been in the field of electrical maintenance my whole career. I've work in a few different industries and I feel like I have a good grip on electrical troubleshooting.

I joined here because my current position puts me in front of obsolete industrial machinery all the time. With a limited budget, we keep the machines running whatever it takes. Sometimes it's not pretty, but it's all in a day's work.

I checked digital because it is the meter in my tool bag, but there are times when the old Simpson analog meter is needed, so these meters are still important even though they may not see the light of day quite as often as their lighter, and smaller digital counterparts.

Electromatic Octal Timers

I'm not sure how vintage or obsolete these Electromatic timers are... but here goes. These are some obsolete octal timers from Electromatic. I have seen hundreds of these throughout my career. I haven't searched for these part numbers lately so I don't know if they are still around, but at one time these were my timers of choice.



The were specifically called S-System timers, the SB125 was a delay on release (or off timer), the SB205 was an interval timers, and the SB225 was a recycler (or repeat timer). I don't have the part number handy for the on-delay version.