Modbus error code 6101 and framing error

Using the Vi's MB INIT and MB WR to monitor the registers of a Micro-Motion sensor but keep getting either Framing error 1073807253 or timeout 6101. The communication is RS232, 1 stop bit, RTU (8 data bits), 9600 Baud and the program reads 50 consecutive registers (Floating), timeout is set to 2000 ms. Usually the errors occur after about 5 minutes or so.
Labview Version 8.5
Labview Version 8.6
Labview Version 2013

Hello Romain
Please find attached my Vi. I have reduced the amount of registers taht were originally read from 50 down to 20 and increased time delays which seems to have removed the error code problem.
However I still miss data, for example the temperature reading will be fine for a few minutes but then go to zero or a large number. The same thing occurs with other registers that are being read.
Thanks
Jack
Labview Version 8.5
Labview Version 8.6
Labview Version 2013
Attachments:
MODBUS MVD VER1.vi ‏37 KB

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Timeout error (code 6101) for acquisition from MODBUS instrument

I am experiencing a problem which other users have reported, but for which little useful information has been posted:
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Attachments:
Floating point 1.12.vi ‏24 KB
timeout error1.JPG ‏31 KB

Thanks for your input, Ravens Fan. I am indeed getting a popup error message with the timeout. I agree that putting the MODBUS read in its own loop would solve the problem. However, I'm struggling with trying to figure out how to actually do this.  Should I put the read in a case structure or a while loop? How do I go about looping back to re-execute the read statement? I think so called "state machine architecture" seems to be where I should be going. Some example code would be greatly appreciated.
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Bonjour,
Je suis débuté en Modbus c'est pour cela que j'ai regardé de nombreux sujets de discussion sur les forums NI etc.. j'ai donc téléchargé la bibliothèque modbus, j'en ai même téléchargé et essyé 3 différentes, j'ai suivi tous les conseils que j'ai pu lire malheureusement mon programme ne fonctionne pas. Le but est de commniquer avec le controleur de température CAL 9400 afin de lui atribuer un setpoint et un heating rate notamment. Mon Pc portable est relui à lui grace à un adaptateur USB-RS232 et un autre cable RS232 qui fait relais. Aucun des exemples ne marche et j'ai à chaque une erreur différente. Je privilégie plutot l'exemple 3. J'ai donné l'adresse 1 au controleur de température qui est ici le " slave", mon PC étant le "master". Pourtant en entrant l'adresse 1 dans mon programme j'ai l'erreur 6101, alors que si j'entre l'adresse 0 dans mon porgramme il n'y a aucune erreur mais rien ne se passe non plus pour le controleur, quelle que soit l'adresse que je lui ai attribué, je ne comprends, pouvez-vous m'aider s'il vous plait ? sachant qu'il y a trois types de data pour le controleur apparament : 18ni,18E1 et 18O1 je ne sais pas ce que ca signifie.
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Modbus error code 6101 and framing error

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