Local non-SNA connection

Each local non-SNA major node defines a set of channel-attached (local) non-SNA terminals. Each minor node represents a non-SNA terminal (such as a 3277). You should deactivate a local non-SNA major node before you take its terminals offline.

Procedure

Take the following steps to define a local non-SNA peripheral node:

Code an LBUILD definition statement followed by a collection of VTAM® definition statements. These definition statements should define each channel-attached non-SNA terminal as part of a logical set (group) of channel-attached non-SNA terminals.
Note:
- You do not need to code a definition statement for the non-SNA cluster controller (3272 or compatible device) to which the terminal is attached. Non-SNA terminals connected to a single cluster controller do not have to be defined in a single major node. Different terminals on the same controller can be defined to VTAM in different local non-SNA major nodes.
- You cannot specify the channel device name when you are activating the logical unit for a channel-attached non-SNA device; the channel device name must be specified on the LOCAL definition statement for the device.
- Code one LBUILD definition statement for each logical group (major node) of channel-attached non-SNA terminals.
- Do not code a PU definition statement. The physical unit for a channel-attached non-SNA device is the VTAM host physical unit (ISTPUS), which is always active while VTAM is running. Therefore, only the local non-SNA major node and its logical units (representing the channel-attached devices) need to be defined and activated.
Code a LOCAL definition statement for each terminal (minor node) in the group. One or more LOCAL definition statements can be grouped with an LBUILD definition statement.

Results

Following is an example of definition statements for a local non-SNA major node:

LC3270NS LBUILD                      LOCAL NON-SNA ATTACHMENT
LOC3277  LOCAL  CUADDR=00A,          CHANNEL UNIT ADDRESS
                TERM=3277,           TERMINAL TYPE
                ⋮
                DLOGMOD=S3270,       DEFAULT LOGON MODE TABLE ENTRY
                LOGAPPL=A50ACCTS     AUTOMATIC LOGON APPLICATION

Note: A local non-SNA terminal should not be defined to and activated by VTAM if its channel unit address is defined as an MVS™ console and allocated to console services. Activating a local non-SNA terminal whose channel unit address is in use by console services can cause VTAM, console services, or both, to abend.