Modbus TCP - U9 (using modbus poll) on MIO | LabJack
 
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Modbus TCP - U9 (using modbus poll) on MIO

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tramanah
tramanah's picture
Modbus TCP - U9 (using modbus poll) on MIO

Hi,

I am able to establish communication within U9 and modbus poll. Manage to pull data from AIN 11, AIN 12. I did connected U9 to CB37 to read more probes on AIN 11 and AIN 12

By default i am able to read modbus address on AIN 11 (40002) and AIN 12 (40024) while MIO default setting is high on MIO 0 = 1, MIO 1 = 1 and MIO 2= 1.

In AIN 11 and AIN12 , I do have 8 probes on each analog input. How i do read via modbus tcp ip the remaining probes via modbus poll.

THank you

LabJack Support
LabJack Support's picture
I'm not quite following.  The

I'm not quite following.  The starting address for AIN0 through AIN13 is 0 through 26 and each is made up of 2 16-bit modbus registers.

https://labjack.com/support/software/api/modbus/ud-modbus

If you are trying to use some canned modbus client, watch out for quirks 1-3 mentioned near the beginning of the following:

https://labjack.com/support/software/modbus-client-applications