Connecting an analog input to a 7i97

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15 Mar 2021 20:12 #202400 by EW_CNC
I'm using a 7i97 Mesa Board on a hydraulic pressbrake retrofit. I need to connect a 0-10V DC signal from the Pressure Transducer. What are my options for connecting this?

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Do I need the 7I87 Remote isolated Analog input card?
Thanks,
Earl W
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15 Mar 2021 20:44 #202406 by PCW
That's probably the easiest way

Though if 10 bits is good enough and you don't mind calibrating, a THCAD-10 would work also
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20 Mar 2021 23:19 #203064 by EW_CNC
I got my 7i87 card today. Do I just connect the card and it will add the necessary pins, or do I need to update the firmware?
Also It seems that I am missing the hm2_7i97.0.encoder-scale pins and the hm2_7i97.0.pwmgen-scale pins.
I'll attach the halcmd pin list.

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File Name: halcmd.txt
File Size:22 KB
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21 Mar 2021 00:02 #203067 by PCW
The firmware should work as-is

Note that the encoder position scale is a parameter, not a pin
so will show up with "halcmd show param hm2"

Also there has been a firmware update to fix a analog output issue on the 7I97
This update inverts the PWM automatically so if you have inverted the PWM in the
hal file, this inversion needs to be removed from the hal file.

New bitfiles:

File Attachment:

File Name: 7i97bitfiles.zip
File Size:381 KB


Example hal / ini files

File Attachment:

File Name: basic7i97_...3-20.zip
File Size:4 KB
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21 Mar 2021 00:51 #203071 by EW_CNC
So do I need to update the firmware with the bitfiles to fix the analog output issue?
I'm not familiar with the process to update the firmware.
Thanks
E.W.

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21 Mar 2021 02:16 #203075 by PCW
Yes. you need to update the firmware to fix the analog output issue

the commands would be

mesaflash --device 7i97 --addr [card_ip_address] --write 7i97_D.bit
mesaflash --device 7i97 --addr [card_ip_address] --reload

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