Two modbus driver with littleEndianRegister as 0 and 1 not giving value properly

[rajkumar.krishnan]

Hello,

I have two modbus drivers running, one with little littleEndianRegister=0 and another one with littleEndianRegister=1 in the config file as my polling devices are defined in this way.

But when i poll the device with littleEndianRegister=1 the values are not coming properly as it is behaving like we set it as 0.


In my config file i have put the entries in below way
[mod_1]
littleEndianRegister = 0
MaxGap = 100

[mod_2]
littleEndianRegister = 1
MaxGap = 100

Please let me know if any solution available to run 2 modbus driver at the same time and polling of data should come properly based on the littleEndianRegister.

Thanks in Advance.

Regards,
Raj

[rajkumar.krishnan]

Hello,

Explanation in more detail

We have created two Modbus drivers for running one with little littleEndianRegister=0 and another one with littleEndianRegister=1 in the config file (like below) as my polling devices are defined in this way.

[mod_1]
littleEndianRegister = 0
MaxGap = 100
firstRequestDelay = 100
pollOptForBlob = 0

[mod_2]
littleEndianRegister = 1
MaxGap = 100
firstRequestDelay = 100
pollOptForBlob = 0
tcpServerPort = 510


Scenario#
1. We have created two devices one should communicate through driver 1 and other with driver 2.
2. Both the Modbus drivers are running.
3. Start communication and poll the device.
4. Device with littleEndianRegister = 0 communicates and retrieves the value properly.
5. Device with littleEndianRegister = 1 is not polling.


Additionally we have tried the below topics,

• Giving new poll groups for the second driver data points as suggested.
• Giving new TCP Server port number as mentioned in the help file.


Queries#:
1. Do we need any license for creating second Modbus driver the log file shows modbus = 1
2. What other settings needs to be done for communicating with second Modbus driver.


Note: If we run only one Modbus driver with littleEndianRegister =1 then the device is polling and communicating properly.

[mod]
littleEndianRegister = 1
MaxGap = 100
firstRequestDelay = 100
pollOptForBlob = 0
tcpServerPort = 510

Thanks in advance.

Regards,
Raj

[leoknipp]

Hello,

normally it should be possible to start several modbus-drivers in one project.
The license keyword modbus is defined as boolean 0/1 and not as a counter. If the value 1 is set the modbus-driver can be used.

Does it work if the modbus-section in the last example is renamed to [mosd_2] and only the modbus driver with number 2 is started?
Have you defined the correct manager number as startup option for the drivers?


Best Regards
Leopold Knipp
Senior Support Specialist