cdesilva
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Posts posted by cdesilva
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@Eric. When I open "Plot" it opens up in Legacy mode.
I have also installed version 3.1.4.0 of IDE. I have both versions installed now. I have disabled the firewall from Trend security agent. For both versions with the firewall disabled, I still see the "upload data" taking a long time and not succeeding. -
@Tony I do not see it listed under "Allowed apps"
All, I am using IDE version 4.0.3.0
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Thank you for the responses. I need to schedule this work again and will get back here when I have some feedback from my end.
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I found instructions on how to do gathering and plotting using IDE. The issue that I am hitting right now is that I am unable to upload the data. It is taking a long time and I think uploading does not work. Any suggestions on where to look at?
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I am troubleshooting an issue related to a servo motor which we use to drive a monochromator Bragg axis. At a specific range of the motion, we observe that the x-ray beam jitters possibly due to motor oscillation. The motor is driven by an external amplifier and we use power PMAC for torque control. The motion is typically carried out by executing a motion program. We first observe the issue with our data. Afterwards we jogged the motor in the questionable range and was able to narrow down on the range where we see the oscillation. The x-ray beam stabilize upon killing power to the motor. I am guessing that the motor is trying to correct its position during this range. In any case I want to plot relevant variables by gathering data. I have not used the plotting feature for gathering and also not gathered data before. Need some help for the following
#1. Determine which variables to plot
#2. What is the procedure for plotting given that I can run a trajectory from EPICS controls to execute the motion program
Thank you. -
Just an update here. Our system is a UMAC rack with accessory cards installed.
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All,
After a power dip, we can't any longer communicate to our power pmac.
On the RG45 interface, both lights come amber and one of them blinks. I tried pinging the device locally using both set and default IP addresses. I have no success.
Can I connect via serial to debug the issue? Can I reset the CPU card to fix the issue?
In general, I want to figure out whether the power dip damaged the CPU card or not. Any guidance on how to proceed with testing is much appreciated.
Thank you,
Chanaka De Silva
NSLSII
Brookhaven National Laboratory
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Okay. Thank you, Steve.
Chanaka
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Hi All,
The Turbo PMAC that I am working on does not have a MAC address assigned. How can I resolve this issue?
Thanks,
Chanaka De Silva
NSLSII controls
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Thanks Richard. Open loop is now good. I was cloning from a working example and did not check in the manuals for DAC specific information.
- Chanaka
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Hi All,
I did few checks and found few issues.
1. Incremental encoder count sign is swapped between the external driver and Power PMAC position read back. I fixed this by swapping the phases. I found the relevant software fix for this. However, for now, I fixed the issue by swapping the cabling.
2. I then tried OPEN LOOP commands.
- #1out1 : This gave me a full -10V output
- #1out-4 : This gives me the full +10V output
Now I need to swap the polarity and fix the scaling such that #1out100 should give me a +10V and vice-versa.
I believe this polarity issue is affecting my JOG. Can someone point me to the functions to accomplish those (polarity + scale) changes?
Thanks,
Chanaka
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Dear All,
I am using the product PBC4-G21-000-A000000 to drive a SERVO motor via an external driver. The driver requires Single Ended DAC output wiring. I am facing the problem that my motor only moves in one direction. I checked the DAC output and figured that it only outputs positive voltages. I am probably missing something in the motor setup. Can I get some input on how to debug/fix this issue?
Thank you,
Chanaka
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Thanks for the reply.
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Hi All,
I am trying to locate ACC-24E3 manual. I looked up under accessories but could not find it under "Manuals" section. Can someone point me to it.
Thanks,
Chanaka
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Thank you Eric. I was able to get pass that error. I am now getting the proper encoder feedback from the external Nikki Denso driver. I am still working on getting the SERVO motor JOG going. I will get back to the thread if I come across any further concerns.
Greetings,
Chanaka
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Hi All,
I was able to find a possible culprit for the error. The UMAC that has been used in the existing project has modules inserted, whereas Power brick does not. I herewith attach a picture of the UMAC controller. I would assume the processors are the same. I am going to try making the appropriate changes and see how it goes.
Thank you,
Chanaka
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Hi All,
The project that I am involved with requires cloning an existing Power PMAC code. I am a Turbo PMAC user (NSLSII GEO_BRICK) and am new to Power PMAC. I went over the documentation and was able to connect and add the existing project code successfully. I was also able to successfully build the code as well. Also I would like to note that the IDE version that I am using required me to migrate the code, which I was able to do successfully (please refer to the attached screen shots).
1. As a first step I simply tried building the code. That went successfully.
2. I then tried build and downloading the code. I am getting an error; ( error #70)
Please find the attached PDF file where I have copy paste the relevant output messages. Afterwards I tried going over the software reference manual, but, did not succeed.
Some more detail about the system.
I am trying to use the POWER PMAC (model information is attached) to drive a servo motor using it's driver. The source code that I am trying to clone it from have the exact same driver+motor combination. And there are some differences which I would like to note below.
a. Existing project uses a Power UMAC instead of a Power PMAC. This should not be a significant difference.
b. Differences between control signal I/O and limits
Existing project: AMP3 ; New project: AMP1
Existing project: ENC4 ; New project: ENC1
Existing project: GPIO on J7 ; New project: GPIO on X15
Existing project: Limits on J4 ; New project: Limits on X13
I have also attached a ZIP file of the project code for your reference. I appreciate your help in getting this going.
Thank you,
Chanaka De Silva
NSLSII controls group
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I was able to find the documentation.
Thanks
Chanaka
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Hi, All
I was trying to follow the discussion thread related to finding the Power PMAC manual/s, but failed to navigate myself.
We recently order a Power PMAC with the following specifications.
Part #: PBC4-G21-000-A000000
4 Axes Power Brick Controller
800MHz EP460EX CPU
2 GB RAM
1 GB Flash/SD-Card
No Additional Ethernet/EtherCAT option
Axes 1-4 True 16-bit DAC - 4 Encoder and Flag Inputs with 32/16 Digital I/O
No Analog Feedback Interface
No Special Serial Feedback
CONKIT-P-1C-A -> Included
Below is my question.
I would like to know what is the maximum clock frequency of encoder signals this PMAC can handle? If you could point me to the manual and where in the manual I can find this information that would be very helpful.
Chanaka De Silva
NSLSII controls
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Curt, Thanks for the reply and explanation. I was not entirely sure what is going on.
Chanaka
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Hi All
I am seeing a *Phasing error* every time I reset the PMAC. It goes away when I phase each motor. However this is the first time I am experiencing such a behavior and would like to know;
1. What could be the cause?
2. How to resolve this behavior?
Thanks
Chanaka De Silva
NSLSII
BNL
Plotting data
in Power PMAC
Posted
I installed IDE on another workstation. And it works without any issues. I think there is some issue with my laptop setup. Thank you all for your responses.