Nrio network configuration properties

Two essential configuration properties for any Nrio network are the Port Name and Trunk; access these on the network’s property sheet view, as shown.

Figure 3. Essential Nrio network properties Port Name, Trunk

Port Name

Each Nrio network in a station must have a unique, specific Port Name value, with the required entry depending on the JACE platform and connection, as shown in Table below.

Nrio network `Port Name` property value by JACE platform and IO connection

JACE platform	Onboard I/O	Onboard RS-485	RS-485 option card, Ports A & B
JACE-8000	—	COM1, COM2	—
JACE-7 series	—	COM2	COM3, COM4
M2M JACE (JACE-202 Express)	COM3	COM2	COM7, COM8

Trunk
Every Nrio network in a station must have a unique Trunk property value, starting at 1, then 2, and so on. This value corresponds to the low-level “actrldn” (access control daemon) that polls that IO.

NOTE: These properties are writable only for an NrioNetwork component (to support remote RS-485 IO modules). Both properties are fixed and read-only for an M2mIoNetwork, as Port Name to COM3 and Trunk to 1.

In Niagara 4.3 and later, the Nrio network has the added Output Failsafe Config property, which you may use to define Comm Loss Timeout and Startup Timeout timer values for all child IO–16 devices.

NOTE: The above two timeout functions can be individually disabled in each of the child IO-16 devices. See the remote IO hardware module’s OutputDefaultValues component.

Property	Value	Description
`Comm Loss Timeout`	8–900 seconds, 8 (default)	Defines the timeout value used by each child IO-16 to detect and enter the Comm Loss state. Default value is 8 seconds.
`Startup Timeout`	8–900 seconds, 600 (default)	Defines the timeout value used by each child IO-16 to detect and enter the Startup No Comm state. Default value is 600 seconds.