S5-115F Manual Communications Capabilities
Connecting a data terminal to a communications terminal
An example using CP 523 to Modem (SIEMENS 2425 B DX)
Figure 7-20. Pin Assignments for CP 523 to Modem
GND(7)GND (2)
(6) Modem DSRDSR (7)
(20) Modem DTRDTR (15)
CTS (9) (5) Modem CTS
Modem RTS(4)RTS (13)
(2) Modem TXD
RS-232-C
(V.24) -TXD
(11)
(3) Modem RXD
RS-232-C
(V.24) -RXD
(5)
ModemCP 523
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Shield (1) (1)Shield
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Shield (8)
Note
If you use the 3964(R) procedure in communications mode, the control cables for the
DSR, DTR, CTS
and
RTS
signals need not be connected.
7.4.4 Failsafe Characteristics of the CP 523
The CP 523 is only used in single-channel configuration in the S5-115F. Operation of the CP 523
with FB 252 BLUE is not failsafe a standard. The operating system does
not
check the received or
sent data for validity or for error-free reception.
The control program must contain safety functions for failsafe data transfer. For this reason, use a
point-to-point connection over the CP 523 in such cases and the prototype-tested standard
function blocks ( Catalog ST57).
Note
Make sure that no addresses have been duplicated before starting up the S5-115F.
Check the address settings on the IM 306, CP 523 and AI 463 modules.
EWA 4NEB 811 6148-02
7-47
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