LTC 8600 | LTC 8800 Series
en | 51
F.01U.127.393 | 2.0 | 2009.03
Instruction Manual
Bosch Security Systems, Inc.
14.1.2 Middle CPU DIP Switch S2
The middle DIP switch provides several user-selectable options. These options are
as follows:
•
Switch 1 of S2
This switch is not used in these systems and should be left
OFF
.
•
Switch 2 of S2
If switch 2 is turned
ON
, the alarm port on the rear of the main Allegiant bay is
configured as an auxiliary console port. This auxiliary port allows the alarm port
(in addition to the regular console port) to communicate with the optional LTC
8059/00 MCS package or the optional LTC 8850/00 GUI Software package.
The port can also be used to control the Allegiant system via the Console Com-
mand Language (documented in the optional CCL manual). The normal console
port and the alarm port (when switch 2 is on) may be used to control the Alle-
giant system simultaneously. Communications parameters (baud & handshake)
for the alarm port can be set using the keyboard (see User Function 32), with
the optional LTC 8059/00 MCS package or with the optional
LTC 8850/00 GUI Software package.
Note that the pin-out of the alarm port differs from that of the console port, so
the cable supplied with the optional LTC 8059/00 MCS package or with the
optional LTC 8850/00 GUI Software package can not be used when interfacing
with the alarm port. If necessary, See Chapter Appendix D, “Main Bay Rear
Panel Connector Pin-outs,” on page 117 for the alarm port pin-outs.
•
Switch 3 of S2
This switch setting is ignored if DIP switch 7 (described below) is set to
ON
.
Current systems utilize a “variable speed” keyboard communication protocol.
Older systems and keyboards were limited to using “fixed speed” keyboard
communication protocols. In addition, there were two types of fixed speed pro-
tocols available. By default, newer CPUs are set to operate using “six poll byte”
variable speed mode, but if a newer CPU is installed into an older system, the
existing keyboards would not operate with this format. This option switch is
provided to support backward compatibility with the older style keyboards.
When this switch is set to
OFF
, the CPU in an LTC 8600 Series system communi-
cates with the system keyboards using a “four poll byte” protocol when this
switch is
OFF
. When it is on, the keyboard communication uses an “eight poll
byte” protocol. For LTC 8800 Series systems, the settings are reversed: “eight
poll bytes” when
OFF
, “four poll bytes” when
ON
.
This option is a global system setting that determines the communication pro-
tocol that will be used for all keyboards connected to the system.
DIP Switch Number Factory Default Setting “Middle” S2 DIP Switch Function
1
OFF
Reserved
2
OFF
Alarm Port Mode
3
OFF
Old Keyboard Modes
4
OFF
Printer Port Mode
5
ON
Security Feature
6
OFF
Not Used
7
ON
Keyboard Protocol Mode
8
ON
Communication Parameters
Содержание LTC 8808/00 Series
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