Configure Mesa 7i96s and pktuart with Omron MX2 (wj200)
06 Feb 2026 16:14 - 06 Feb 2026 16:17 #342555
by Stephan@work
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07 Feb 2026 18:23 #342615
by Stephan@work
Replied by Stephan@work on topic Configure Mesa 7i96s and pktuart with Omron MX2 (wj200)
Hey Guys,
bad luck. The communication seems to run between mesa and Vfd.
Now i measured (in parallel) the connected Mesaoutput with Vfd Input. (mesa_modbus.png)
Compare to the connected USB-Dongle output and Vdf Input (USB_Modbus.png)
Signal Quality looks pretty good. (pktuart seems to work)
I figured out by using the USB-Dongle, that i have to set some Frequency to get this RUN-LED flashing on my OmronMX2 Vdf.
So I implemented all the other necessary Hal Pins to .hal file to check this with the Mesa <--> Vdf communication.
Know, if i click the CW AXIS GUI Button, Iḿ getting the same Error at my Vdf ( E12.1 like a few days ago).
From my point of view, there must be something wrong with the run, reverse or cmd-freq command.
Or still some wrong configuration somewhere.
Iḿ still getting no Vdf temperature out of the Vdf.
so write or read is not Working,
my current .mbccs:
Can someone explain these?
Once, i had one PDU Error. But i guess it was only a wrong configuration.
Iḿ loosing my motivation, i wasted 3 weeks now 3h a day
bad luck. The communication seems to run between mesa and Vfd.
Now i measured (in parallel) the connected Mesaoutput with Vfd Input. (mesa_modbus.png)
Compare to the connected USB-Dongle output and Vdf Input (USB_Modbus.png)
Signal Quality looks pretty good. (pktuart seems to work)
I figured out by using the USB-Dongle, that i have to set some Frequency to get this RUN-LED flashing on my OmronMX2 Vdf.
So I implemented all the other necessary Hal Pins to .hal file to check this with the Mesa <--> Vdf communication.
Know, if i click the CW AXIS GUI Button, Iḿ getting the same Error at my Vdf ( E12.1 like a few days ago).
From my point of view, there must be something wrong with the run, reverse or cmd-freq command.
Or still some wrong configuration somewhere.
Iḿ still getting no Vdf temperature out of the Vdf.
so write or read is not Working,
my current .mbccs:
<mesamodbus baudrate="9600" parity="N" interval="1000" stopbits="1" duplex="half">
<devices>
<device name="omronmx2" address="0x01"/>
</devices>
<initlist>
<command device="omronmx2" address="0x0001" function="W_COIL">
<description>Zero Operation</description>
<data value="0"/>
</command>
<command device="omronmx2" address="0x0002" function="W_COIL">
<description>Reverse Operation</description>
<data value="0"/>
</command>
<command device="omronmx2" address="0x0001" function="W_REGISTERS">
<description>Frequency</description>
<data value="0"/>
</command>
</initlist>
<commands>
<command device="omronmx2" address="0x0001" function="W_COIL" name="run"/>
<command device="omronmx2" address="0x0002" function="W_COIL" name="reverse"/>
<command device="omronmx2" address="0x0001" function="W_REGISTERS" name="cmd-freq" haltype="HAL_FLOAT" modbustype="U_AB" count="1"/>
<command device="omronmx2" address="0x0014" function="R_COILS" name="is-at-speed" count="1"/>
<command device="omronmx2" address="0x0018" function="R_COILS" name="watchdog-out" count="1"/>
<command device="omronmx2" address="0x0013" function="R_COILS" name="is-running" count="1"/>
<command device="omronmx2" address="0x1003" function="R_REGISTERS" name="motor-current" haltype="HAL_FLOAT" modbustype="U_AB" count="1"/>
<command device="omronmx2" address="0x1019" function="R_REGISTERS" name="heatsink-temp" haltype="HAL_FLOAT" modbustype="U_AB" count="1"/>
</commands>
</mesamodbus>Can someone explain these
<data value="0"/>Once, i had one PDU Error. But i guess it was only a wrong configuration.
Iḿ loosing my motivation, i wasted 3 weeks now 3h a day
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17 Feb 2026 18:16 #343099
by Stephan@work
Replied by Stephan@work on topic Configure Mesa 7i96s and pktuart with Omron MX2 (wj200)
I'm back !
With some good new !
I figured out my Problem. (read the fvck!ng manual
)
For some reasons, you have to decrement the Register address by one for "run" and "reverse".
Now I'm struggling with the command-frequency.
I can run the Vdf using the Mesa pktuart. But I there is still a scaling of 2.56
If i send 10Hz to the Vdf, the displayed frequency on my OmronMx2 show me 25.6Hz
same as 100Hz. Vdf - 256 Hz
I checked all combinations of U_AB, U_BA, S_AB, S_BA, F_AB, F_BA.
Did i miss something or choose the wrong LSB/MSB ?
Same as Motor Current.
Heatsink-temperature works pretty well.
With some good new !
I figured out my Problem. (read the fvck!ng manual
)For some reasons, you have to decrement the Register address by one for "run" and "reverse".
Now I'm struggling with the command-frequency.
I can run the Vdf using the Mesa pktuart. But I there is still a scaling of 2.56
If i send 10Hz to the Vdf, the displayed frequency on my OmronMx2 show me 25.6Hz
same as 100Hz. Vdf - 256 Hz
I checked all combinations of U_AB, U_BA, S_AB, S_BA, F_AB, F_BA.
Did i miss something or choose the wrong LSB/MSB ?
Same as Motor Current.
Heatsink-temperature works pretty well.
<mesamodbus baudrate="9600" parity="N" interval="10000" stopbits="1" duplex="half">
<devices>
<device name="omronmx2" address="0x01"/>
</devices>
<initlist>
<command device="omronmx2" address="0x0000" function="W_COIL">
<description>Zero Operation</description>
<data value="0"/>
</command>
<command device="omronmx2" address="0x0001" function="W_COIL">
<description>Reverse Operation</description>
<data value="0"/>
</command>
</initlist>
<commands>
<command device="omronmx2" address="0x0000" function="W_COIL" name="run"/>
<command device="omronmx2" address="0x0001" function="W_COIL" name="reverse"/>
<command device="omronmx2" address="0x0001" function="W_REGISTER" name="cmd-freq" haltype="HAL_FLOAT" modbustype="U_BA"/>
<command device="omronmx2" address="0x0018" function="R_COILS" name="is-at-speed" count="1"/>
<command device="omronmx2" address="0x0017" function="R_COILS" name="watchdog-out" count="1"/>
<command device="omronmx2" address="0x0012" function="R_COILS" name="is-running" count="1"/>
<command device="omronmx2" address="0x1002" function="R_REGISTERS" name="motor-current" haltype="HAL_FLOAT" modbustype="S_AB" count="1"/>
<command device="omronmx2" address="0x1018" function="R_REGISTERS" name="heatsink-temp" haltype="HAL_FLOAT" modbustype="F_BA" count="2"/>
</commands>
</mesamodbus>
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