Omron CX-INTEGRATOR - V1.1, Руководство по эксплуатации

Страница: 136 / 338

3-2 Setting the Routing Tables
3-2-3 Setting the Gateway Counter
3-2-3 Setting the Gateway Counter
Use the following procedure to set the gateway counter in the PLC.
To set the gateway counter, the routing tables must be displayed in the PLC Routing
Table Window. The gateway counter can be set offline or online.
Function of the Gateway Counter
In a FINS network, a GCT value (gateway counter: number of allowed bridge passes)
is set in each FINS command frame's FINS header when a FINS command is sent or
a FINS response is returned. When a FINS response is received, this GCT is
automatically decremented by the number of times that the message passed across
network layers. The following examples illustrate the function of the GCT value.
When GCT = 02 hex, up to 3 network layers can be crossed.
When GCT = 07 hex, up to 8 network layers can be crossed. (The network must be
configured for PLC models with the GCT set to 07 hex.)
Setting the Gateway Counter
Setting the Gateway Counter Value for each PLC Model
The allowed settings for the GCT value depend upon the PLC model.
CS/CJ-series Units Version 3.0 and Later
The GCT value can be set to 02 hex or 07 hex.
Set the GCT value in the Gateway Counter Setting Dialog Box when creating the
routing tables.
Setting the Gateway Counter in a FINS Local Routing Table:
1. Click the SIOU Tab at the bottom of the PLC Routing Table Window and right-click
the local PLC's icon.
3-17