Poll
Records & Linked Tags Table Form
Poll
Record Configuration Detail Form
Poll records are the heart of I2k's
IO processing. Each poll record specifies the range of programmable
logic controller (PLC)
registers from which to acquire data. The PLC database comma
separated value (CSV) export file is
then used to extract and build a table of tags that fit the criteria
specified by the poll record. The poll engine in turn uses the poll
record to populate a tags value (Val) field with realtime data from the PLC.
Form Scheme
Form
Security & Poll Record Linking Form
I2k
is a form based system. Poll records are linked to forms, which when
active, trigger the poll engine to update the associated tags. Security
passwords can also be assigned to forms preventing users from performing write
operations to a PLC without first logging in.
Prototypes
PLC
Data Prototyping Form
Each
poll record is linked to a data prototype. This prototype provides the
poll engine with the information it needs to process data reads and writes.
System
System
Configuration Form
The
system form is a configuration interface for the end user. Here, the user
can assign parameters to link to an external ODBC or Access database, modify
system variables, and monitor system status'.
Example Interface Screen
The
Final Product; Example Process Inteface Screen
Process
interface screens are constructed with Access 2000 standard
controls. I2k provides a
powerful set of tools that allow the developer to take advantage of these
controls array of properties.
PLC
Write Dialog Form
The
write handler dialog displays PLC tag information, default or user defined
range, and current value. All writes to a PLC are first validated
then logged to the Write Log form.
