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Siemens SIMATIC PANEL PC 877 User Manual

Page 246

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Detailed descriptions

17.6 BIOS setup

SIMATIC Panel PC 877

17-54

Operating instructions, Release 07/2006, A5E00877780-01

"I/O device configuration" submenu

Figure 17-11 COM/LPT configuration submenu


The resources used by an interface are released when you disable the interface in question.
The I/O addresses and interrupts are pre-assigned; it is advisable not to change these

default assignments.

Internal printer port LPT1

Mode:

Use this setting to set the operating mode of the printer port. Refer to the table below to

ensure that the setting matches the data output device you connected to the printer port.

Configurable mode

Properties

Output Only

Standard Parallel Port -

uni-directional (SPP)

Standard setting for the 8 bit parallel transfer according to IEEE1284

specifications

Feedback of the output device is only possible via the control cables

Bi–directional Standard

Parallel Port - bi-

directional

as for SPP – uni-directional, however:

Feedback of the output device is also possible via the 8 bit data

cables

EPP enhanced parallel

port

Enhanced parallel port (data transfer rate from 500 Kbps up to 2

Mbps)

Hardware handshake

different devices can be addressed