Alarms

jonunder

jonunder
Quick question about alarms and the MASSO. After an air low alarm is tripped, it doesn't seem to automatically clear. So far I have been able to clear it by homing, but is it possible for it to clear automatically once air pressure is restored? Is there another way to clear the alarm instead of homing every time?

I recall seeing similar behavior in the axes alarms also. I was able to clear the axis alarm by homing the machine, but the MASSO seemed to ignore if the alarm was actually fixed. If the servo alarm still existed, that axis wouldn't move, leading to the potential for a crash. I think this creates some usability issues for a user. The SureServo drives have a servo reset capability that can clear some alarms, but not others. So the user may attempt to use the servo reset button, but without feedback from the MASSO, they would have to go to the back of the machine and open the NEMA box which is considered a safety violation. This forces the user to reboot the machine for each axis alarm.
 

masso-support

MASSO Support
Staff member
each alarm can be handled in a different way depending on how the users want it, till now in most of the critical alarms the machine needs to be homed to clear but we can look into this. So at this stage are you looking into the air low alarm only or others too?
 

jonunder

jonunder
I'm not an experienced machinist, so I would be interested in other people's opinions to back up my thoughts. I would like to see the air alarm go away if the signal returns to nominal without homing. It seems that the alarm goes away when homing, even if the alarm is still active.



As for the axis alarms, I would like to see the alarm go away if the signal goes to normal and then require homing. This way there is feedback to the user to show that the alarm has been in fact fixed. Some servo alarms require power reset, while some can be fixed via a reset line.
 

masso-support

MASSO Support
Staff member
sure, let's wait for some time for other users feedback on this topic and we will make a logic review plan for each alarm.
 

al

AL
on other controllers , things like low air pressure , low way oil , low coolant , door open etc - these put the machine in a feed hold condition with a indicator light or message on the screen of what tripped the error , the operator can rectify the problem and press cycle start to continue with running the program , no rehoming or start from beginning of program required.

if I run into a limit switch it generates a over travel error and shows which axis and +, - direction then I go into jog mode and use hand wheel to move off tripped switch error goes away and its ready to machine again no rehoming

if I e-stop or have a power failure or a drive / motor failure or spindle problem then we have to fix / clear error and cycle power and rehome the machine
 

masso-support

MASSO Support
Staff member
thanks @al and please keep your feedback coming in this topic.

On the MASSO G2 the memory was limited and we could not add detailed message details but can definitely add this to the G3 controllers, will definitely make troubleshooting for the user much easier.
 

airnut

Airnut
I for one would also like to see at least the air alarm reset automatically when air comes back on. This feature was not even on this machine in its previous life.

In my case I spent most of the day trying to figure out what I did wrong. I thought I had it wired wrong, I changed it and it still did not work like I expected. Only when decided to try the on / off buttons and recycled the Masso with the air on did the alarm clear.

This is one of those little details it would be nice to know about in your manual. It seems like we have to guess on what is supposed to happen most of the time. Makes it hard on us builders trying to second guess what the program does or does not do for each input/output.

Been thinking about this and I suppose the thinking may be that the air is what powers the spindle brake, so perhaps it might be considered a quasi safety issue. That is, forcing a reset to be able to use the machine is a safety fix thing. I like to protect myself, so my vote is automatic reset when the switch is cleared. This will be a all new machine when and if I get it done so I can live with it either way as long as I know what to expect.

I haven't got to the X,Y,Z or spindle alarms yet. Perhaps you have a suggested routine published for those as well? Again its all in knowing what to expect.

Regards,

Steve
 

MaccaRnD

MaccaRnD
Can multiple Drive alarms be wired to the same input, so when any one is triggered the one input is all that s required to Alarm Masso?. A closer inspection of the drives would tell you which is at fault as most have a multi colour LED indicator for status.

I don t think I would have enough space for each drive to use its own input. I m only in the wiring stage at the moment and after culling down the required outputs and inputs I only have one or two of each spare.



With Clearing errors it would be good to be able to Override the Alarm ie hold a button down while rectifying the issue.

I ve had to do this multiple times on industrial machines. (hopefully I didn t miss it if Masso can already do that).

An Alarm reset button or sequence would bo good to be able to just click rather than having to do a full machine re-home or power down/restart.
 

zombieengineer

ZombieEngineer
@macarms

What kind of drives are you using? (Vendor & Model)

If the drives have a transistor output it might be possible to wire all the outputs together with a pull-up/down resistor.

Otherwise you may need to use Diode Logic to connect the alarm signals together. Diode logic would require one diode per drive plus a pull-up/down resistor.
 

MaccaRnD

MaccaRnD
@zombieengineer

@masso-support

XYZ are DMM DYN4 -T01A2 AC Drives , hoping to use the DYN4 drives for the other Axis, but I won t have those servos until next week, to be able to check compatibility.

what would be the best way to wire the Drive Alarms togeather, (limited fir space with the amount or inputs that the machine has) would the resisters need to change, Breezy said it s possible to connect them all through one alarm input. I m just not sure of the correct way to wire them all up together, with how the resisters would need to be used. Any help would be great thanks.

Mac
 

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zombieengineer

ZombieEngineer
@macarms

Manual for your drive - Output is an optocoupler transistor switching to ground (page 13), this is a simple wiring problem not requiring diodes.

Connect all the ALM outputs together to a single MASSO Input with a single 5.6K? pull-up resistor. When there is no servo motor problems the input should be high (the input needs to be inverted from the F1 screen as I believe the motor alarm input is error when high).
 
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