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Chapter 5 - Commands
console as shown in the following example. To
display the parameters for an individual channel, say
channel three, you would enter ATL3 and hit your
Return key.To display the parameters for all of the
channels, enter ATL0 and then hit your Return key.
Local Channel Parameter
CHN
01
02
03
SPD WORD
19200
8
19200
8
19200
8
STP
BIT
1
1
1
PARITY
NONE
NONE
NONE
FLOW
CONTROL
XON/XOFF
XON/XOFF
XON/XOFF
ENQ/
ACK
OFF
OFF
OFF
ECHO
OFF
OFF
OFF
PACE
OFF
OFF
OFF
PASS
EIA
OFF
OFF
OFF
PASS
XON
OFF
OFF
OFF
04
19200
1
NONE
XON/XOFF
OFF
OFF
OFF
OFF
OFF
PO-2
8
Parity Select
The Parity Select commands set the parity of the
MultiMux operations. Under normal operations
(default conditions) parity is off and the word length
is set at eight bits. Since the MultiMux is intended to
be transparent to channel device operation, this
combination will pass parity information to the
channel devices.The P0 command turns parity off,
P1 sets odd parity and P2 setsit at even.
R
Response Time Priority
The Response Time Priority command determines
how long the mux will wait to send data from
channel devices relative to each other. An R0 setting
is the shortest and R3 the longest. The function of
the Response Time Priority commands is to ensure
that channel operations which require heavy data
transfers, such as program transmissions or print
operations, do not use too much of the buffer and
reduce the throughput of the other channels to
unsatisfactory levels. In such cases, the
interactiveuser who needs immediate responses
would experience unreasonable delays. The
Response Time Priority numbers 0,1, 2, and 3
establish the relative time each channel must wait
for data. The lower the number the shorter the wait.
An R3 number is the most efficient for throughput
(allows more data to be assembled before sending a
block) so if your mux is used mainly for printing an
R3 setting is the best. R0 provides the fastest
response time so that your interactive users should
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