dSPACE CLP1104, Hardware Installation And Configuration

Page: 165 / 170

■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ ▼
Troubleshooting
DS1104 Hardware Installation and Configuration March 2004
165
▲ ■■■■■■■■■■
I
▲ ■ ■■■■■■■■■■■■■■
Problems with Multiple Plug & Play
Boards
Working with more than one dSPACE board in plug & play
configuration presents us with two problems. The first is that the
logical name of a board as assigned by the software must be
associated with a physical board. The second is that under certain
conditions, assignment of the names to the boards may change
unexpectedly. It is vital to detect this situation, because otherwise an
application to be loaded to a certain board might be loaded to another
board of the same type by mistake.
For example, assume you have one board connected to the engine
ECU and another connected to the ESP system of a vehicle. In order to
avoid severe damage to the car, you must avoid loading the program
intended for the ECU-related board to the ESP-related board, and vice
versa.
Affected boards The problem described always applies to DS1104 boards (and
MicroAutoBox via DS815 or DS817) because plug & play mode
cannot be disabled.
It also applies to DS1103 and DS1005 boards if they are configured to
plug & play mode. For these boards, plug & play mode can be used
only if they are installed in a PC directly. This might be the case with an
industrial PC with many ISA slots and a built-in PC.
The problem can be avoided for DS1103 and DS1005 boards installed
in a PC simply by disabling the plug & play mode. This means,
however, that you must set up a configuration free of I/O address
conflicts by setting the I/O address switches of the boards manually.
Plug & play boards
in an expansion box
The problem never applies to DS1103 , DS1005 and DS1006 boards
installed in a dSPACE expansion box independently of the type of
interface used to connect the box to the PC, because when they are
installed in expansion boxes, the plug & play mode must be disabled.