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device attached to that port.
Common rates between 45.5 and 38,400 bps are
available. See the baud rate chart (Table 3-4) for
specific rates available. Some other baud rates
between 18.75 and 38,400 are available with
custom programming.
• Code Set — Rules that specify the way sets of
characters (also called codes) are represented
internally to a computer. The User Program-
mable CAP can conform to almost any device's
data code.
User Programmable CAP Data Code Options:
a) ASCII
b) EBCDIC
c) TRANSCODE
d) BAUDOT
e) TICKER TAPE
f) OTHER — The User Programmable CAP
can pass data in any code set without
conversion if both ports are set up for
"OTHER."
• Transmission Mode — This is the protocol
defining how information is transmitted over
the RS-232C interface.
The User Programmable CAP's Transmission
Mode Options are:
a) Full-Duplex — Transmission occurs in
both directions simultaneously.
b) Half-Duplex — Transmission occurs in
either direction, but not simultaneously.
c) Simplex — Transmission occurs in one
direction only.
2.2 User Programmable CAP Features
You can program the User Programmable CAP to
convert single or multiple character sequences to
other single or multiple character sequences. This
unit is an inline buffer box with two modes of
operation: programming mode and pass-thru
mode.
2.2.1 P
M
ROGRAMMING
In Programming Mode, you can enter and update
translation equations and any other parameters
used in the translation process. Translation
equations consist of two parts, the match string and
the substitute string. Each of these strings can be up
ODE
to 256 characters long. These translation equations
are stored in a nonvolatile memory which retains
information all the time, even during power loss.
Maximum memory available for the translations in
8K. You can enter programming mode either by
toggling a DIP switch or by entering a user-defined
software string.
2.2.2 P
-T
M
ASS
HRU
ODE
In Pass-Thru Mode, the unit buffers data received
from each port and translates any character
sequences as defined in the translation equations.
Then it retransmits this data out of the other port,
using the configured word structure, baud rate, and
flow control of the port. A character sequence is
passed through transparently unless it corresponds
to a match string in one of the translation
equations. If a match occurs, the character
sequence is replaced by the substitute string of
the corresponding translation equation.
2.2.3 U
U
PLOAD
SER PROGRAMMABLE CAPABILITY
The User Programmable CAP can upload its
internal translation table for storage on a PC. So
you can to have a backup of the table if you ever
need it.
2.2.4 D
U
OWNLOAD
SER PROGRAMMABLE CAPABILITY
The User Programmable CAP can be programmed
by downloading a translation table from a PC. This
is useful if you want to configure more than one
unit with the same table, such as in identical
installations in multiple locations.
2.2.5 P
M
T
ARTIAL
ATCH
A Partial Match Timeout can be enabled via a menu
option. This lets the unit pass a partially matched
string through the unit if the remainder of the
string was not received within the time period set
by the user.
2.2.6. C
F
ONTROL
IELD IN
You can program a control field in each substitute
string. This lets the unit raise or lower a DTR
or RTS control lead. The unit can also enter
a program mode when a valid match string is
received.
CHAPTER 2: Introduction
IMEOUT
S
S
UBSTITUTE
TRING
5
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