110 •
••
• GE GENIUS QUICKDESIGNER
Series 6 or 90/XX PLC’s
Series 6 and 90/XX PLC’s can communicate with a QuickPanel equipped with the optional GE Genius
bus interface module. This module can support both datagrams and global data.
Datagrams are messages that are sent to a specific device and this device responds only to the sending
device.
•
Datagrams generated by a QuickPanel on a Genius bus are sent to the PLC and the PLC responds
directly back to that single QuickPanel.
•
The PLC can only process one datagram per scan. Panel update speed will vary depending upon
the number of datagrams that need to be sent to update a single panel.
•
Different variable types displayed will each require a separate datagram
•
Multiple QuickPanels on the same Genius bus will each generate there own datagrams to update
the currently displayed panel. The more QuickPanels on the bus the slower the update time.
Global Data is sent as a “broadcast” by each connect device for all connected devices to hear once per
bus cycle.
•
Automatically sent each bus scan.
•
Broadcast to all other devices on the Genius bus.
•
Global data adds to the Genius bus scan time
•
PLC scan time will increase.
•
A single variable type is monitored, and a single variable type can be written.
•
QuickPanel panel update is maximized
Summary
For the fastest panel update use global data. To display a large amount of data, or a variety of data
types use datagrams. You can use both global data and datagrams on a single project. Datagrams can be
turned on/off in the GE Genius setup menu of the QD software.
Global data operational specifications
The GE PLC can be programmed to broadcast a portion of it’s data table onto the GE Genius bus. The
selection of this data is controlled by configuring the bus controller module in the 90/XX, while in the
Series 6 it requires a DPREQ function to be implemented. Examples of both setups will follow. When
the PLC Genius bus controller receives the bus token a broadcast is made of selected data that all the
QuickPanels can hear. Each of the QuickPanels will accept the data and move it into a receive data
table. The bus token will be passed to a QuickPanel on the Genius bus and it will broadcast its send
data table. This data table will be received and routed to the proper data table in the PLC. The bus
token is passed to the next QuickPanel on the bus and it will broadcast it’s send data table to the PLC.
This data table is received and routed to the proper data table in the PLC. When a QuickPanel
broadcasts its send data table other QuickPanels on the Genius bus will ignore this information. The
following table assumes two QuickPanels (QP-A and QP-B) are on a Genius bus with a PLC.
Bus token at Global Data sent by Global data accepted
PLC PLC QP-A and QP-B
QP-A QP-A PLC
QP-B QP-B PLC
To Next Page
Loading...
