Detailed descriptions
16.5 BIOS Setup
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
179
"I/O Device Configuration" submenu
Figure 16-15 "I/O Device Configuration" submenu
The resources used by an interface are released by disabling this interface.
It is advisable not to change the default I/O addresses and interrupts.
Internal printer port LPT1
Mode
Use this setting to set the operating mode of the printer port. This setting
must match the terminal device you connected as described below.
Configurable mode
Features
Output Only
Standard Parallel Port -
unidirectional (SSP)
-Standard setting for 8-bit parallel data transfer to the IEEE1284
specification
-Feedback of the output device is only possible via the control channels
Bi-directional Standard
Parallel Port -
bi-directional
Same as SPP - unidirectional, but:
- Feedback of the output device is also possible via 8-bit data channels.
EPP Enhanced Parallel
- High-speed parallel port (data transmission rates between 500 kbit/s
and 2 Mbit/s are possible)
-Hardware handshake
-different devices can be addressed
ECP Extended Capability
Port
Same as EPP, but:
-separate DMA channel
-FIFO buffer
-Data compression