GE Energy
D20/D200
Installation and Operations Guide
General 994-0078-2.00-7
Full
25
Familiarization
, continued
D20ME/ME II
Factory Fitted
Software
The D20ME/ME II has Base software, which resides on the BootROM installed at
the factory.
Each D20ME/ME II board undergoes factory testing. The level of testing depends on
the type of system you have ordered. See “D20/D200 Software Configuration” page
99.
D20ME:
Serial I/O
Architecture
•
Supports eight serial channels, and utilizes a serial I/O (SIO) chip (called the
"Octart")
•
Serial channels are routed to the DB-9 connectors on the back of the chassis
•
One channel (COM0) from the rear panel is also routed to the WESMAINT
DB-9 connector on the face plate of the processor card.
Note: Use
only a standard PROMAINT cable (GE Energy part number 977-
0048) when you are connecting to the D20ME or ME II’s front-panel
WESMAINT connector. Use of any other cable may cause serious damage.
Serial
Performance
The following table gives the serial communication performance of the D20ME. The
information below is provided
only
as a guideline for comparison.
Note 1: The aggregate limits of the modules are dependent on the quantity and
processing load of other applications running in the modules.
Note 2: The actual communication speed of any port is defined by and limited to
speeds that individual applications support. Some applications and base
systems may not support baud rates higher than 9600.
Parameter
D20ME/ME II Limit
Aggregate serial communications
limit of module, half-duplex
7 ports at 38.4 kbps, plus WESMAINT
Enhanced
Feature:
68K Monitor
Speed Change
Using the Monitor's
BAUD
command, the communication speed of the WESMAINT
port can be changed to a higher or lower rate. The most common reasons for
increasing the WESMAINT port speed are to reduce the time required to:
•
Download application code file to the flash memory, and to
•
Carry out a configuration download.
Refer to “Appendix B: Changing the Baud Rate”, page 127 for more information.
