USER MANUAL APS 6.0

Using WHO
12–1
12 Using WHO
The WHO function lets you view active devices on the DH-485 and DH + networks.
WHO has two modes of operation:
• Who Listen lets you view active nodes on the DH-485 or DH+ network without
placing your terminal on the network.
Note DH+
Bridged users - When you use the Who function with a 1784-KT or
1784-KL module, access to the DH + link is not possible using the Who function.
However , you can see the Active Node T able fr om the DH-485 side of the
1785-KA5 gateway module.
• Who Active identifies the nodes currently being used and allows you to monitor
and modify parameters associated with the nodes.
WHO is not supported when your system is configured for DF1 protocol (DF1
Full-Duplex and DF1 Half-Duplex Master/Slave).
Note The WHO function is not available for the MicroLogix 1000 controllers.