Mesa 7I84 problem

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22 Jan 2021 13:26 #196226 by tancorny
Replied by tancorny on topic Mesa 7I84 problem
At card 7i74 I plugged in at chan0, chan1 and chan2. I'll use chan3 and chan4 for another cards 7i84. I shouldn't use chan0?

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22 Jan 2021 13:32 - 22 Jan 2021 13:37 #196227 by tommylight
Replied by tommylight on topic Mesa 7I84 problem
Not sure if it was 0 or 7, one of them has RS485 capabilities
There are 7 of them left, so plenty.
EDIT:
Just checked, that info was wrong, my bad, removed it.
Last edit: 22 Jan 2021 13:37 by tommylight. Reason: wrong info

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22 Jan 2021 13:54 #196230 by bevins
Replied by bevins on topic Mesa 7I84 problem

tommylight wrote: Not sure if it was 0 or 7, one of them has RS485 capabilities
There are 7 of them left, so plenty.
EDIT:
Just checked, that info was wrong, my bad, removed it.


Channel 7 has the 2 wire half duplex rs485.
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22 Jan 2021 16:16 - 22 Jan 2021 16:16 #196235 by PCW
Replied by PCW on topic Mesa 7I84 problem
Channel 7 on a 7I74 supports RS-485, but this does not interfere with its use
for SSerial (its 4 wire RS-485 and the enable is set true), But note that
the 7i92_7i77_7i74D configuration only has 6 sserial channels (port 1 channels 0..5)
on the 7I74 due to space limitations in the 7I92s FPGA. You also have a free
SSerial channel on the 7I77 (port 0 channel 2)

Port 1 Channel 0 not working might be a cabling issue or 7I74 power issue
(is the 7I92 jumpered to supply power to the 7I74?)
Last edit: 22 Jan 2021 16:16 by PCW.
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22 Jan 2021 16:51 #196241 by tancorny
Replied by tancorny on topic Mesa 7I84 problem
tommylight I wanted to tell You - thanks a lot! Problem resolved. All cards are present in linuxcnc. First card had a problem with plugin RJ45.

PCW thanks for Your explanation how it works.
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