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Cabling and Wiring the System
6-34
SIMATIC 545/555/575 System Manual
6.5 Connecting to a Printer
545, 555, and 575 CPUs have the capability to send information to a printer
through the use of an SF program or SF subroutine. The printer connects to
a serial port and uses RS-232 protocol.
The 545/555 CPU uses Port 1 for printer operations and the two available
printer handshaking options are as follows:
XON/XOFF printer handshaking; see Figure 6-23.
READY/BUSY printer handshaking; see Figure 6-24.
NOTE: Set dipswitch 2 on the
CPU to the OFF
position for printing.
(Not required for all printers.)
RCV XMT
XMT RCV
GND
RTS
CTS
Port 1 (RS-232/423)
RTS
CTS
RSD
DSR
DTR
9
6
5
1
Serial Printer
or
Programming
Device
Figure 6-23 545/555 XON/XOFF Printer Handshaking
CTS CTS
XMT RCV
GND
Port 1 (RS-232/423)
RSD
DSR
DTR
9
6
5
1
Serial Printer
NOTE: Set dipswitch 2 on the
CPU to the OFF
position for printing.
Figure 6-24 545/555 READY/BUSY Printer Handshaking
Overview
545/555 Printer
Connections
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