Multicomp Pro MP710086 DC Power Supply Review

RE: Multicomp Pro MP710086 DC Power Supply Review

Yorick — Wed, 30 Aug 2023 14:22:32 GMT

Hi,

I do not have the MP710086 power supply but another Multicomp power supply: MP710509

Thanks to this tutorial, I succesfully displayed the product information using Pyvisa framework, here is the python code:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:a19d7896-9023-456f-a113-33a112c760e8:type=python&text=import%20pyvisa%0A%0Arm%20%3D%20pyvisa.ResourceManager%28%29%0Apower_supply%20%3D%20rm.open_resource%28%22ASRL%2Fdev%2FttyACM0%3A%3AINSTR%22%29%0Apower_supply.baud_rate%20%3D%20115200%0Apower_supply.query_delay%20%3D%200.1%0Apower_supply.called%20%3D%20False%0Apower_supply.timeout%20%3D%2010%0Apower_supply.read_termination%20%3D%20%20%27%5Cn%27%0Apower_supply.query_termination%20%3D%20%27%5Cn%27%0Apower_supply.write_termination%20%3D%20%27%5Cn%27%0Aprint%28f%22Device%20info%20%7Bpower_supply.query%28%27%2AIDN%3F%27%29%7D%22%29]

This display: Device info MP710509 V1.1 SN:00001482

Unfortunately, that is the only thing I am able to get from this power supply, here is the code when I am trying to set and read the voltage:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:d6a588d5-4d94-4e19-99f1-1a5c81d9210d:type=python&text=import%20pyvisa%0A%0Arm%20%3D%20pyvisa.ResourceManager%28%29%0Apower_supply%20%3D%20rm.open_resource%28%22ASRL%2Fdev%2FttyACM0%3A%3AINSTR%22%29%0Apower_supply.baud_rate%20%3D%20115200%0Apower_supply.query_delay%20%3D%200.1%0Apower_supply.called%20%3D%20False%0Apower_supply.timeout%20%3D%2010%0Apower_supply.read_termination%20%3D%20%20%27%5Cn%27%0Apower_supply.query_termination%20%3D%20%27%5Cn%27%0Apower_supply.write_termination%20%3D%20%27%5Cn%27%0Aprint%28f%22Device%20info%20%7Bpower_supply.query%28%27%2AIDN%3F%27%29%7D%22%29%0Apower_supply.write%28%22VOLT%20%22%2Bstr%281%29%29%0Aprint%28f%22Voltage%20%7Bpower_supply.read_ascii_values%28%27MEAS%3AVOLT%3F%27%29%5B0%5D%7D%22%29%0A]

I have the following trace:

Device info MP710509 V1.1 SN:00001482
Traceback (most recent call last):
File "/home/ww_bum_evi_ci_agent1/tmp/yorick/EVI-SW.dhcom_image_generator4/step_impl/power_supply/mp710509.py", line 14, in <module>
    print(f"Voltage {power_supply.read_ascii_values('MEAS:VOLT?')[0]}")
File "/usr/local/lib/python3.10/dist-packages/pyvisa/resources/messagebased.py", line 529, in read_ascii_values
    block = self.read()
File "/usr/local/lib/python3.10/dist-packages/pyvisa/resources/messagebased.py", line 486, in read
    message = self._read_raw().decode(enco)
File "/usr/local/lib/python3.10/dist-packages/pyvisa/resources/messagebased.py", line 442, in _read_raw
    chunk, status = self.visalib.read(self.session, size)
File "/usr/local/lib/python3.10/dist-packages/pyvisa_py/highlevel.py", line 519, in read
    return data, self.handle_return_value(session, status_code)
File "/usr/local/lib/python3.10/dist-packages/pyvisa/highlevel.py", line 251, in handle_return_value
    raise errors.VisaIOError(rv)
pyvisa.errors.VisaIOError: VI_ERROR_TMO (-1073807339): Timeout expired before operation completed.

I tried a lot of other "write" commands but that was pointless, it has no effect on the power supply. And every query commands I tried ended up with timeout error (excepting "*IDN?").

Do you have any idea why this does not work for MP710509? I suspect a brand new command definition for this product (and I cannot find any documentation on the web!). Or maybe that is because it is a multi-channel power supply and I don't know how to handle the specificities of this kind of product.

Thank you very much!

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Mon, 27 Sep 2021 00:46:27 GMT

Hi Mr. Frank

Good Day.

I wish to connect the Multicomp PRO MP710086 using the Serial Port at the rear.

However, I can observe the connection via my PC Device Manager but not able to communicate.

I have tried the following:

1. Cross switching the TX & RX cable - Pin 2 & 3

2. Tried connecting via Tera Term

3. Tried 2 other USB to Serial Adaptor Cable

4. Tried updating the USB Serial Adaptor - Driver Software

FYI, I am able to communicate on my Digital Oscilloscope Model RIGOL DS1102E using its Serial Port

I only seem to experience connection issue with my DC PSU.

Can you kindly share your connections understanding on your MP710086 DC PSU.

Thanks & Best Regards

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sun, 29 Aug 2021 02:08:29 GMT

Hi Good Day

Re: MP710086 - DC Power Supply

I forgot to mention that I have a Fluke 45 DVM.

I tried using the same Seral to USB cable and confirmed on the Fluke 45 DVM and confirmed it works.

Thanks

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sun, 29 Aug 2021 02:04:02 GMT

Hi Good Day

Re: MP710086 - DC Power Supply

As previously stated, I have no issues using the USB TMC Interface.

However when I switch to use the Serial Port at the rear I am not able to make it work using my IDE's - PyCharm or others.

I am using a Serial to USB Interface cable.

I am able to see the cable connection on my Device Manager as COM5

How ever on my IDE PyCharm I am not able to open or send any simple commands which is possible with the USB Interface

I tried using the PuTTY Configuration too its not getting connected.

I have tried using NI MAX too not able to make *IDN? work

I have tried using Agilent I/O, its not able to recognize.

Do I need any special drivers for this model?

Kindly assist.

Thanks & Best Regards

RE: Multicomp Pro MP710086 DC Power Supply Review

colporteur — Thu, 15 Jul 2021 00:57:15 GMT

FM, some people collect stamps or coins for a hobby.

What motivated you to start a hobby collecting PS's?

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Wed, 14 Jul 2021 23:54:52 GMT

Hi Good Day.

I am presently trying to connect my old Fluke 45 Dual Display with Serial RS-232 Connector.

This unit does not have the IEEE-488 Interface Connector* option.

I connected to my computer using a USB to Null Modem RS232 DB9 Serial Adapter Cable.

Under Device Manager its connected as COM6

Under Python PYcharm or Visual Studio C# I am not able to identify using the *IDN?

I have searched around and am unable to find any codes on the Internet.

I would appreciate some assistance to write a simple Python or C# script to connect the Fluke 45 DVM and run using SCPI commands.

Thanks & Best Regards

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Fri, 02 Jul 2021 00:18:10 GMT

Python: write and read the DC voltages at RUN Time to DC Power Supply.

PyCharm Python Console:

I need some assistance to write python codes to do the following:

I need to write a voltage change [user input] to the DC Power Supply and read back the measured voltage from the DC Power Supply.
Example the code to change the DC Voltage to 3.3 Volts is: PSU.write('VOLT 3.3').
These changes must take place at run time.

Thank you for your kind support.

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Mon, 21 Jun 2021 14:15:29 GMT

[View:/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208203.png:1280:720]

Finally able to see the Brand FARNELL,MP710086,2017052,FV:V1.5.2

However, can make out what this error is all about:

The reason for the deprecation is the possible conflict with the visa package provided by the https://github.com/visa-sdk/visa-python which can result in hard to debug situations.

warnings.warn(

Many Thanks

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Mon, 21 Jun 2021 12:53:44 GMT

[View:/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208201.png:1280:720]

[View:/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208202.png:1280:720]

Apologize for the earlier confusion.

Now here we have a good comparison between NI-Max & Python - PyCharm.

Thx & Br

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Mon, 21 Jun 2021 11:34:18 GMT

I have conducted the NI IO Trace Test. below is the captured screen. [View:/resized-image/__size/820x674/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208200.png:820:674]

Thx & Br

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sat, 19 Jun 2021 07:17:11 GMT

I have tried using IDLE Shell IDE

[View:/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208198.png:1280:720]

Regards

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sat, 19 Jun 2021 06:55:47 GMT

I tried using Python 3.9 (64-bit)[View:/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208197.png:1280:720]

Regards

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sat, 19 Jun 2021 01:20:33 GMT

Tried out PSU.timeout = 10000

Pls see attached image

Errors remains.

Thx & Br

[View:/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-3c49a708-61be-44a9-8a2e-9d4f0d7c5dc5/contentimage_5F00_208196.png:1280:720]

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sat, 19 Jun 2021 00:50:20 GMT

Before you might have manually added a driver for the power supply hence it was showing up in the list but not possible to communicate with. You should be able to communicate with the power supply now that it shows up properly in NI MAX.

In NIMAX its able to communicate, However If I attempt with Python Id's its not able to communicate.

Thx & Br

RE: Multicomp Pro MP710086 DC Power Supply Review

edax — Sat, 19 Jun 2021 00:47:39 GMT

Right you are, In Python ID's listing devices isn't a problem.

However, if I use the resource name and query using:

print(PSU.query("*IDN?"))

Then comes the Errors.

This errors are found only on my Farnell MP 710086 DC Power Supply.

I had purchased this DC PSU because its under USD200 and affordable for the students to purchase and write out their Python programs at home.

and also because it comes with a USB Port and its portable for the students to carry it around with their laptop.

Hope you understand why I am grounded with this DC PSU and its problems.

Thx & Br