Product Description
1.1 Uses of the CP 340
PtP coupling and configuration of CP 340
12 Manual, 04/2011, A5E00369892-03
Functions of module variants
The functionality of the drivers depends on the module variant of the CP 340:
Table 1- 2 Functions of CP 340 module variants
Function CP 340–RS 232C CP 340–20mCP TTY CP 340 RS 422* CP 340 RS 485*
ASCII driver Yes Yes Yes Yes
Operating the RS 232C
accompanying signals
Yes No No No
Controlling/reading of RS 232C
accompanying signals with FBs
Yes No No No
RTS/CTS flow control Yes No No No
XON/XOFF flow control Yes Yes Yes No
3964(R) procedure Yes Yes Yes No
Printer driver Yes Yes Yes Yes
RTS/CTS flow control Yes No No No
XON/XOFF flow control Yes Yes Yes No
* The RS 422 and RS 485 differ in respect of their parameter assignments.
Possible applications for the CP 340
The CP 340 communication processor supports point-to-point communication with various
Siemens modules and with non-Siemens products:
● SIMATIC S5 via the 3964(R) driver with corresponding interface module on S5 side
● Siemens BDE terminals ES 2 family via 3964(R) driver
● MOBY I (ASM 420/421, SIM), MOBY L (ASM 520) and ES 030K data acquisition terminal
via 3964R driver
● SIMOVERT and SIMOREG (USS protocol) via the ASCII driver (CP 340-RS 422/485),
with appropriate adaptation of the protocol using a STEP 7 program
● PCs via the 3964(R) procedure (the following development tools are available for
programming on PCs for MS DOS or for Windows: PRODAVE S5 DOS/Win 64R
(6ES5 897-2VD01))
● Barcode readers via the 3964(R) or ASCII driver
● Non-Siemens PLCs via the 3964(R) or ASCII driver
● Other devices with simple protocol structures by means of appropriate protocol
adaptation with the ASCII driver
● Other devices that also have a 3964(R) driver
● Printers (HP Deskjet, HP Laserjet, Postscript, Epson, IBM)
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