Tab: Redundancy Settings: Redundancy Link

This tab in the Redundancy Configuration dialog configures the redundancy link between the two PLCs. The link allows for communication between the devices so that they can be operated synchronously and status changes can be triggered.

Tip

Whenever possible, use a separate port especially for this communication only.

Table 6. Redundancy Link / 1st Redundancy Link

IP address PLC 1

Example: 192.168.101.176

IP address PLC 2

Example: 192.168.101.87

Port

Defines the IP port for the connection between both devices

The TCP port number is the UDP port number + 1.

Example: 1205; then Port 1205 is used for UDP and 1206 is used for TCP

Use two redundant links

standard icon : Additional network connection between both devices

In the case that the first network connection fails, the second one can be used.

Note

You can get information about the current connections using the GetConnectionInfo function from the CmpRedundancyConnection library.

When two redundant connections are used, the performance is worse.

If one of the two connections is disconnected, then this has no effect on the redundancy status.

Table 7. 2nd Redundancy Link

IP address PLC 1

Example: 192.168.101.178

IP address PLC 2

Example: 192.168.101.21

Port

Defines the IP port for the second connection between both devices

The TCP port number is the UDP port number + 1.

Example: 1207; then Port 1207 is used for UDP and 1208 is used for TCP

Read	Clicking this button reads the current redundancy link settings for PLC1 into the dialog.
Write	Clicking this button transmits the available redundancy link settings to both PLC devices. Note Most settings become effective only after the runtime systems have been restarted. The Timeout and Synchronization timeout settings are applied immediately.