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Printer Port Internal LPT1
Mode:
Settable Mode
Output Only
Standard parallel port –
unidirectional (SPP)
Bidirectional
Standard parallel port –
bidirectional
EPP
Enhanced parallel port
ECP
Extended capability port
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04
Use this setting to set the operating mode of the printer interface. Refer
to the table below to ensure that the setting matches the printer
connected to the printer port.
S
Standard setting for the 8 bit parallel transfer
according to IEEE1284 specifications
S
Feedback of the output device is only possible via
the control cables
as for SPP – unidirectional, however:
S
Feedback of the output device is also possible via
the 8 bit data cables
S
Enhanced parallel port (data transfer rate from
500kbps up to 2Mbps)
S
Hardware handshake
S
different devices can be addressed
as for EPP, however:
S
own DMA channel
S
FIFO backup
S
Data compression
Configuring the SIMATIC Box PC 620
Features
6-17

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