Hi,
I think my explanation not enough for your analysis. According to the emerson flow meter manual holding register(4 xxxx) data's not sutable for our data process.
The input register(3 xxxx)is a integer data's upto 65535, the tri-plc T100MD+ working well upto 65535.The holding and input register's not suitable because our data processing above 16-bit.
Regarding to our data processing the floating-point register pairs only possible(page-7,modbus mapping for micro motion transmitter).The micromotin flow meter based on ieee754 standard.The modbus mapping maual i pass already to your distributer.
For exaple
=======
if you want to read the floating-point register pair (2 0259 0260) data by plc ,have to use function code-3,modbus address 0258(always-1 in which address you want to read) good enough to read the data.under the same format the Allen bradley,yokogawa plc i tested working well.
you mention 20002 and 20003 address,such address not in emerson address mapping.The above you mentioned is Input register 3 0002 and 3 0003 read by function code-4,the data upto 65535(16-bit).
regards this issue what ever i had a problem with tri-plc,the same in allen bradley &yokogawa but they have option to choose fuction code what you want,in tri-plc i think donot have such option.please correct me if i donot understand fully about tri-plc regarding this issue.
thank u.
Raja.