41
CHAPTER 5: Operation
enter a Conversation mode with a device connected to a second-layer TEP,
send “C
n
[CR]C
m
[CR]” from the master device, where
n
=the slave port of the
first-layer TEP that the second-layer TEP is attached to, and
m
=the slave port
of the second-layer TEP that the desired device is attached to. Figure 5-1 on
the next page shows an illustration of this.
To properly exit Conversation mode when you’re finished, the disconnect
or abort command must be issued to the highest-layer TEP first, then the
next-highest, and so on downward to the first layer again. For example,
assuming
• the first-layer command character is “N” and the second-layer character is
“O,”
• you want to exit the conversation smoothly and allow data in the buffers
to be transmitted, and
• you want to end up talking to the first-layer unit in its standard
Concentrate mode,
then send the “disconnect” command string “OOOONNNN”.
5.3.4 B
ROADCAST
O
NLY
M
ODE
When you want to transmit data to ALL slave devices simultaneously while the
Terminal Eliminator Plus buffers their input data, enter Broadcast Only
Mode. You can enter Broadcast Only Mode with a single command from a
Concentrate mode (see
Section 5.2.5
) or a chained command from a
Conversation Mode (see
Section 5.2.9
).
The “Disconnect” and “Abort” commands (see
Sections 5.2.1 and 5.2.2
) are
the only commands the TEP will execute in the Broadcast Only Mode. Return
to your TEP’s standard Concentrate mode to enter any other command.
5.3.5 A
CCESSING
B
ROADCAST
O
NLY
M
ODE IN
C
ASCADE
A
PPLICATIONS
Two or more Terminal Eliminator Plus units can be linked together to share
the same operator’s console. This is referred to as “cascading.” (Refer to
Section 5.3.3
for the rest of the general principles.)
Assuming that you’re starting from a Concentrate mode on the first-layer
Terminal Eliminator Plus, to broadcast to the slave devices attached to only
one
third-layer TEP, send “C
n
[CR]C
m
[CR] BC[CR]” from the master device,
where
n
=the slave port of the first-layer TEP that is connected to the master
port of the second-layer TEP, and
m
=the slave port of the second-layer TEP
that is connected to the master port of the third-layer TEP. These commands
put the TEPs in the first two layers in Conversation (one-to-one) Mode, so the
master device can broadcast to the slave ports of just the third-layer TEP.
