<![CDATA[Modbus RTU]]>https://forum.rexygen.com/category/14RSS for NodeSun, 17 May 2026 15:43:30 GMTWed, 05 Nov 2025 20:24:10 GMT60<![CDATA[error on Modbus driver]]>@cechurat Hi Tomas,

Yeah I see, thank you.

Cheers,
Mike

]]>https://forum.rexygen.com/topic/615/error-on-modbus-driverhttps://forum.rexygen.com/topic/615/error-on-modbus-driverWed, 05 Nov 2025 20:24:10 GMT<![CDATA[MBM error]]>@MikeyH Hi Mike,

This is related to the communication timeout - inspect data length with respect to baudrate and timeouts.

All REXYGEN error codes here in Docs: https://www.rexygen.com/doc/ENGLISH/MANUALS/BRef/BRef_ENGap3.html#x488-487000C

Cheers,
Tomas

]]>https://forum.rexygen.com/topic/610/mbm-errorhttps://forum.rexygen.com/topic/610/mbm-errorTue, 01 Jul 2025 01:26:43 GMT<![CDATA[Modbus RTU in REXLANG or Python]]>Hi Mike,

I recommend checking out the examples in the 0401_Modbus_RTU folder or take a look at the 0121-10_Monarco_HAT_Modbus_RTU_ADAM-4024 and 0121-11_Monarco_HAT_Modbus_RTU_Loopback_USB examples. These are all provided in REXLANG. Hopefully, these examples will provide some assistance.

Cheers,
Jan

]]>https://forum.rexygen.com/topic/390/modbus-rtu-in-rexlang-or-pythonhttps://forum.rexygen.com/topic/390/modbus-rtu-in-rexlang-or-pythonTue, 15 Aug 2023 04:08:04 GMT<![CDATA[Read and Write Modbus register on HMI]]>@rexpeter
Hi Peter,
no problem. I'm glad, it's works.

Cheers,
Jan

]]>https://forum.rexygen.com/topic/238/read-and-write-modbus-register-on-hmihttps://forum.rexygen.com/topic/238/read-and-write-modbus-register-on-hmiMon, 10 May 2021 21:16:28 GMT<![CDATA[Strange Modbus Behavior]]>@mikeyh Hi Mike,

thanks for update. Could you please try to test one Raspberry Pi with certain SD card (i.e. OS) and check with working Monarco HAT and then switch the one failing so we can say it is Monarco HAT failure afterwards?

Thanks for cooperation.

Kind Regards,
Tomas

]]>https://forum.rexygen.com/topic/208/strange-modbus-behaviorhttps://forum.rexygen.com/topic/208/strange-modbus-behaviorMon, 01 Feb 2021 00:02:14 GMT<![CDATA[Modbus RTU multiple read]]>@apollo I understand. Just keep in mind that the Passive feature is available both at Modbus RTU and Modbus TCP.

Kind Regards,
Tomas

]]>https://forum.rexygen.com/topic/203/modbus-rtu-multiple-readhttps://forum.rexygen.com/topic/203/modbus-rtu-multiple-readMon, 25 Jan 2021 14:48:35 GMT<![CDATA[Reading and Writing 4 byte floating point from modbus]]>@reitinge Thank you very much! That is what I am doing right now 🙂 It works good enough.

]]>https://forum.rexygen.com/topic/174/reading-and-writing-4-byte-floating-point-from-modbushttps://forum.rexygen.com/topic/174/reading-and-writing-4-byte-floating-point-from-modbusThu, 17 Dec 2020 20:25:05 GMT<![CDATA[Two Modbus instances on one controller solves device incompatibility!]]>Hello,
thanks for sharing your experience and findings. There's nothing to add, only that from the nearest release the REXYGEN compiler will issue a warning when two drivers use the same configuration .rio file.

Jaroslav

]]>https://forum.rexygen.com/topic/112/two-modbus-instances-on-one-controller-solves-device-incompatibilityhttps://forum.rexygen.com/topic/112/two-modbus-instances-on-one-controller-solves-device-incompatibilityTue, 05 May 2020 07:20:55 GMT<![CDATA[Echo on RS485]]>Thank you Jaroslav, you learn something every day! That will help more than you know with all of my projects. especially ones with process models 🙂

Cheers

Mike

]]>https://forum.rexygen.com/topic/85/echo-on-rs485https://forum.rexygen.com/topic/85/echo-on-rs485Tue, 17 Dec 2019 22:44:58 GMT<![CDATA[Modbus on TTL Advice]]>Hi Jaroslav,

I will email you the documentation for the device.

Cheers

Mike

]]>https://forum.rexygen.com/topic/28/modbus-on-ttl-advicehttps://forum.rexygen.com/topic/28/modbus-on-ttl-adviceThu, 18 Apr 2019 03:19:03 GMT<![CDATA[Serial ports on Wago PFC200]]>Hi Jaroslav,

That explains why i could not find it. I will look into a TCP version or another PLC with more serial ports.

Thanks,
Richard

PS
I now have a slightly used 750-652 for sale 😉

]]>https://forum.rexygen.com/topic/26/serial-ports-on-wago-pfc200https://forum.rexygen.com/topic/26/serial-ports-on-wago-pfc200Mon, 15 Apr 2019 21:51:46 GMT<![CDATA[Wago Modbus - Port name + Address > 65535]]>Hi Richard,
there are various "simplifications", using various offsets to distinguish between the four tables of data. For Holding registers, the most typical is offset of 40000, but as you already noticed, this is no standard.

Best regards,
Jaroslav

]]>https://forum.rexygen.com/topic/25/wago-modbus-port-name-address-65535https://forum.rexygen.com/topic/25/wago-modbus-port-name-address-65535Sun, 14 Apr 2019 09:18:05 GMT<![CDATA[Read/Write Modbus]]>Hi Tomas,

Thank you for your help. I understand how it works now, what you provided is where i wasn't sure what to do. It makes sense to me now.

Cheers

Mike

]]>https://forum.rexygen.com/topic/23/read-write-modbushttps://forum.rexygen.com/topic/23/read-write-modbusSun, 07 Apr 2019 21:46:09 GMT