Programming the Local Host
Chapter 5
513
For example, in Figure 5.3 we show a rung that designates only the
remote node on the local link:
010
00
020
G
023
G
If you were to designate a remote station that is on Channel 2 of a KFL
interface, you would have to add a user designation:
010
00
012
=
020
G
023
G
If you were to designate a remote station that is on another link (Link 3),
you would have to add a link designation:
010
00
012
=
020
G
023
G
003
=
You can designate link and user on memory access rungs and supervisory
general command rungs. You can designate user on time-critical general
command rungs. However, you cannot designate link on time-critical
command rungs because time-critical commands can only be sent to
nodes on the local link.
Commands to read immediate-access blocks can only designate node.
These commands cannot designate link or user.
ImmediateAccess Update Rung
The purpose of immediate-access rungs is explained in Chapter 2. Now it
is time to program one. Each immediate-access rung defines a block of
words in the local host data table that can be read by any remote node
through commands to read immediate-access blocks. An
immediate-access update rung consists of an EXAMINE-ON element,
two GET elements, an EXAMINE-OFF element and an Output Energize
Address 02707 element (Figure 5.8).
