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PART 2: CX-Server PLC Tools
CHAPTER 11 – Routing Tables
OMRON
CX-Server PLC Tools_Page 140
Table View Screen
The Table View screen provides a method of setting the routing table by means of a tabular view.
The screen is comprised of two main sections:
♦
The local settings (Left hand side)
♦
The remote settings (right hand side)
The local settings section allows a series of entries for the SIOU (Special Input/Output Unit) and it’s
corresponding Local Network number.
The remote settings section allows a series of entries for the Remote Network number, it’s corresponding Relay
Network number and it’s corresponding Relay Node number.
The slider control to the right of each section can be used to bring any more than the eight entries into view if so
required.
Each of the data entry fields have their own individual set of spin buttons, which when pressed will increment or
decrement the value. The number can also be entered normally using the number keypad on the user keyboard.
Three control buttons can be found at the bottom of the screen:
♦
Ok
button: Once all data entry has been completed, selecting the ‘Ok’ button will check the table entries for
errors. If the check fails, an error description dialog will be displayed. If the check does not detect any errors
the Main Screen will be displayed.
♦
Restore
button: If during data entry, the user wished to revert back to the table state that was in effect before
the Table View was displayed; The user should select the Restore button.
♦
Cancel
button: This button will cancel any changes made whilst the Table View was being displayed and
then display the Main View screen.
Note:
For CS/CJ-series PLC of Ver. 2.0 or CP-series PLC or later with CX-Programmer Ver.
4.0 or later, FINS commands can be used to access nodes up to eight network levels
away, including the local network.
Gateway Counter Settings
Gateway Counter Framework
When sending FINS commands or returning FINS responses in a FINS network, the GCT
(Gateway counter: Permissible number of times a network bridge can be crossed) is set in the FINS
header of the FINS command frame. When the FINS response is received, the GCT is automatically
reduced by the number of network levels that were accessed. Therefore, the GCT setting
corresponds to the number of network levels that can be accessed, as follows:
•
GCT = 02 hex: Access to up to three network levels away.
•
GCT = 07 hex: Access to up to eight network levels away (the network configuration, however,
must use PLCs for which the Gateway counter (GCT) is set to 07 hex).
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