how to configure modbus using LabVIEW?

[Donald]

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@Anonymous wrote:
... I wonder if I can at all write to the outputs when the switch is in Run.

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No, you can't write to the outputs/V-memory/anything when the mode switch is in the RUN position.

When the DL-05 (and -06,-205, -350, etc.) manual discusses mode switch positions (Chapter 4) and says "No changes are allowed by the attached programming/monitoring device" in the RUN and STOP positions, it really means no changes.

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... Because the PLC manual warns that after the supercapacitor discharges when the power comes back on it is unknown whether it will go into Run or Program mode. So it is highly desirable to be able to write to the inputs with the switch in Run.

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There is the D0-01MC memory cartridge option which seems to be the only way to add battery backup to the DL-05. I don't remember it existing 5 years ago (when I last considered the -05) and don't know much about it.

Good luck.

[Ruju]

Mr. Tushar,

           Can u please send me ur DL details, as i want 2 know the feature and applications of DL!!!!!

Thanks in Advance,

Rujuta

[Tushar_Jambhekar]

Hi Rujuta

Please send me your mailID as well as contact number.

Our dataloggers features are as follows

Real Time Display and analysis

Data Trending

bulk downloading

device  aliases (multiple aliases for single device based on register partitions)

Mltiple(configurable) logging targets

etc etc etc...

if you want to have further information you can contact me on 09823015765 or you can mail me on tushar@vidishaconsultancy.co.in

[Anonymous]

Page 4-29 of the manual also says that there is bit 13 in V7633 which
can be used to force the PLC into Run when the switch is in Term
position: "Location can also be used to set thepower-up in Run Mode
option." I think I will have to rely on that.

[Donald]

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@Anonymous wrote:
Page 4-29 of the manual also says that there is bit 13 in V7633 which can be used to force the PLC into Run when the switch is in Term position ...  I think I will have to rely on that.

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You might also want to monitor one (or more) of the special relays related to the CPU status (Appendix D in the manual). 

e.g. SP12 is on only if the CPU is in Terminal-Run mode.  Useful as a means of catching when somebody has moved the mode switch and left the CPU in an incorrect mode.

SP0-SP17 are in V41200, SP20-SP37 are in V41201, etc.