HU-PYXIS
24
PYXIS
System User Guide
CONFIG SWITCH
Switch Function
SELECTION
Setting for Pyxis
OFF
ON
1 MASTER/SLAVE
SELECT SLAVE
MASTER
ON–Master, OFF-Slave
2
P CLOCK SELECT
10 MHz
20 MHz
ON
3
SYSTEM RUN MODE
NORMAL
TEST OFF
4
RS232 PORT BAUD RATE
9600
38400
ON
5 DEFAULT
TRIGGER
SELECT
625
525 Not
Used
6 RE-CONFIGURE
MANUAL
AUTO
ON
7 DATABASE
TYPE
FIXED
CONFIGURED
ON
8 CONTROL
MODE
GENERAL
PANELS Not
Used
Table 6: 2445 Nebula Control Card: Config. Switch Functionality
SW1
Master/Slave select is used, in dual control situations, to assign Master/Slave status to the 2445
control modules. One module MUST be set to MASTER and the other to SLAVE so that on reset or
power up the Master 2445 powers up first and, hence, always becomes the active controller.
SW2
P clock select is used to select between 10 MHz and 20MHz µP clock frequency and should
be left set to 10MHz.
SW3
System Run Mode determines which mode of operation the Pyxis powers up in (i.e. NORMAL
or TEST). NORMAL is the standard mode of operation. TEST selects a special test mode where
various features of the Nebula Controller hardware can be tested by Snell.
SW4
RS232 port BAUD rate select. This port is used by the Windows database editor which runs on
a PC using its COM port. The editor software will automatically detect the BAUD rate configured, and
therefore this rate only needs changing to 9600 BAUD if the PC being used has difficulty
communicating at 38400 BAUD.
SW5
Default trigger select is used to select between 625 or 525 reference to be assigned to each
source for the fixed databases. Not used with a configurable database so not used on Pyxis.
SW6
Reconfigure selects between AUTOmatic configuration of modules in the system on power-up
or reset and MANUAL configuration. In AUTO the system configuration is compared to that held in
non-volatile memory and any changes in module configuration found will be included in the
configuration and saved to the non-volatile memory. It is recommended that during initial
configuration the switch is set to AUTO, and when the final desired configuration is achieved, the
switch changed to MANUAL. This means the control card will always look for the intended system
card configuration, and if cards or slave systems appear after the initial power-up, they will not be de-
configured from the system.
SW7
Database Type selects whether to use the fixed, non-editable database or the editable one.
Pyxis does not support fixed databases so ‘CONFIGURED’ must be selected.
