Mesa modbus and pktUart

PCW
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21 Jan 2025 14:45 - 29 Jan 2025 16:00 #319571 by PCW

Replied by PCW on topic Mesa modbus and pktUart

I guess its possible, You could add a stiff pulldown (say 470 ohm) on TXEN to test
are you sure its not parity related?

Maybe I can get one to try.
(Edit 2 ordered will try to get them running when they arrive is about 10 days)

Does seem that function 2 would make more sense on inputs and 15 on outputs

Last edit: 29 Jan 2025 16:00 by PCW.

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vre
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29 Jan 2025 10:44 #320067 by vre

Replied by vre on topic Mesa modbus and pktUart

With this config i have no errors

    {HAL_BIT, 2,  0x0000, 32,     "in"},
    {HAL_BIT, 15, 0x0000, 32,    "out"},
    {HAL_U32, 6,  0x00FE, 1,     "setbaud"},

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vre
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30 Jan 2025 17:06 #320161 by vre

Replied by vre on topic Mesa modbus and pktUart

When i set an out pin to TRUE after shutdown linuxcnc remains true
how can fix this except setting signals to 0 in shutdown.hal file.

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PCW
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30 Jan 2025 17:13 #320162 by PCW

Replied by PCW on topic Mesa modbus and pktUart

If the device does not have a built-in watchdog, I guess you could remove its logic
power with a watchdog controlled device.

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PCW
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05 Feb 2025 02:02 #320686 by PCW

Replied by PCW on topic Mesa modbus and pktUart

Finally got my cards and I should note (to save others some time)
that to run the Eletechsup modbus 25IOC32 card using the MODBUS
functions 2 and 15, You need to short solder jumper M0 on the card.

They seem to work as expected

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