Basic Principles of Serial Data Transmission
2.6 Data transmission with the printer driver
PtP coupling and configuration of CP 340
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Manual, 04/2011, A5E00369892-03
BUSY signal
The CP 340 evaluates the printer's "BUSY" control signal. The printer indicates to the CP
340 that it is ready to receive:
●
CP 340-20mA-TTY: current on RxD line
●
CP 340–RS 232C and CP 340-RS 422/485: CTS signal = "ON".
Note
When RTS/CTS flow control is parameterized, you must set the polarity of the BUSY
signal on the printer as follows:
BUSY signal: CTS = "OFF"
Please note that some printers use the DTR signal to display the BUSY signal. In such
cases you must wire the cable to the CP 340 appropriately.
Содержание SIMATIC CP 340
Страница 6: ...Preface PtP coupling and configuration of CP 340 6 Manual 04 2011 A5E00369892 03 ...
Страница 10: ...Table of contents PtP coupling and configuration of CP 340 10 Manual 04 2011 A5E00369892 03 ...
Страница 186: ...Accessories and Order Numbers PtP coupling and configuration of CP 340 186 Manual 04 2011 A5E00369892 03 ...
Страница 190: ...Literature on SIMATIC S7 PtP coupling and configuration of CP 340 190 Manual 04 2011 A5E00369892 03 ...
Страница 200: ...Index PtP coupling and configuration of CP 340 200 Manual 04 2011 A5E00369892 03 ...