TCP/IP Properties

Use the TCP/IP properties to enter information about TCP/IP communications for the port. You can define the following:

Connect Time Out

Enter the number of milliseconds to wait when making a connect request to a device.

Request Time Out

Enter the number of milliseconds to wait when waiting for a request to complete.

Heartbeat Timer

This field is only available if you select the PLC Redundancy option.

Enter a value in seconds that will be the "Heartbeat" interval for probing the Series 90 controllers. Do not set an interval lower than the Scan Rate for the port.

Each Series 90 controller in a redundant group will be probed at the "Heartbeat" interval to determine the state of the device.

Mode Address

This field is only available if you select the PLC Redundancy option.

Enter the starting address of the location of two consecutive status bits in digital memory that indicate the current state of the programmable controller.

 

The first bit indicates the overall health of the programmable controller (1=healthy).

The Series 90 nickname for this bit is LOC_READY

 

The second bit indicates whether the programmable controller is the current master in the redundant pair (1=master).

The Series 90 nickname for this bit is LOC_ACT.

 

Both status bits should be set by logic in the Series 90 controller, and will be read at the "Heartbeat" interval.

This address must be a legal address in the Series 90 controller or the heartbeat will fail.

Use %S35 for Series 90-70.

User %M1019 for Series 90-30.

PLC Redundancy

Set this check box to enable PLC Redundancy for this port. When you do, the Mode Address field becomes available.

You can enter your own values or select Default Values to use the factory default values. The default values are:

Connect Time Out

1000 ms (1 second)

Request Time Out

5000 ms (5 seconds)

Heartbeat Timer

120 seconds (2 minutes)

Mode Address

%M1019

If you configure redundant devices for the port, then clear the PLC Redundancy check box, the following warning message will be displayed to remind you to review the redundancy setups for all devices currently configured for this port.