manmeetvirdi
Member
Hi
We have key operated selection switch in a panel on which HMI(MP277) is also mounted.
Is it possible that when this selection switch is in OFF condition the value transfer from HMI's I/O field
to DB's of PLC stops?
Transfering the data from the one location to other when selector switch is in ON position is one way, but gives problem when I/O fields are too many.
This is the requirement of the client, who wants to stop unauthorised data entry in HMI.
Can it be done, say I password protect all the I/O fileds of HMI and when when selection switch is in ON condition, I transfer correct LOGIN NAME and PASSWORD to HMI, after which I/O fields can be accessed.
And when its in OFF condition i activate the LOGOFF function of HMI.
But then where to transfer the LOGIN NAME and PASSWORD?Is it Area Pointer?
Similarly how to activate LOGOFF function through HMI?
Manmeet
We have key operated selection switch in a panel on which HMI(MP277) is also mounted.
Is it possible that when this selection switch is in OFF condition the value transfer from HMI's I/O field
to DB's of PLC stops?
Transfering the data from the one location to other when selector switch is in ON position is one way, but gives problem when I/O fields are too many.
This is the requirement of the client, who wants to stop unauthorised data entry in HMI.
Can it be done, say I password protect all the I/O fileds of HMI and when when selection switch is in ON condition, I transfer correct LOGIN NAME and PASSWORD to HMI, after which I/O fields can be accessed.
And when its in OFF condition i activate the LOGOFF function of HMI.
But then where to transfer the LOGIN NAME and PASSWORD?Is it Area Pointer?
Similarly how to activate LOGOFF function through HMI?
Manmeet
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