Siemens PANEL PC 877 Device configuration submenu, Internal printer port LPT1

Detailed descriptions 17.6 BIOS setup

"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 setting for the 8 bit parallel transfer according to IEEE1284
Standard Parallel Port -	specifications
uni-directional (SPP)	• Feedback of the output device is only possible via the control cables
Bi–directional Standard	as for SPP – uni-directional, however:
Parallel Port - bi-	• Feedback of the output device is also possible via the 8 bit data
directional	cables
EPP enhanced parallel	• Enhanced parallel port (data transfer rate from 500 Kbps up to 2
port	Mbps)
	• Hardware handshake
	• different devices can be addressed

17-54	SIMATIC Panel PC 877
	Operating instructions, Release 07/2006, A5E00877780-01