S5-115F Manual Communications Capabilities
S5 bus and transfer memory
The data between the CPU and the CP 523 is transferred via the S5 bus. The data is stored on the
CP 523 in a transfer memory of eight bytes. The addresses for the transfer memory are derived
from the initial address of the module and an offset of 0 to 7.
The CP 523 only reads the data in the transfer memory and updates the transfer memory with
current data after the entire data block (four words) has been written into the transfer memory by
the user program. The current data can then be read by the user program.
Figure 7-17. Using the Transfer Memory
CPU transfers job to
transfer memory
CP reads bytes 0 to
7 of transfer
memory
CP overwrites
bytes 0 to 7 of the
transfer memory
CPU can read
current data from
transfer memory
Rules for galvanic isolation
In order to guarantee safe galvanic isolation between the S5-115F and the CP 523, you must
• Select a suitable interface
• Make settings on jumper X10.
The following table gives an overview of the permissible interfaces.
Table 7-26. Jumper Settings for Safe Galvanic Isolation
Galvanic Isolation
to the 5 V Supply
to VDE 160
On the Device
Connected to
the CP 523
Permissible
Interface
Jumper Setting on
Jumper Block X10 of the
CP 523 ( Figure 7-17)
Remarks
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Printers and
operator
panels
yes
V.24
(RS-232-C)
TTY active
TTY passive
Plug in jumpers 1 to 9
Plug in jumpers 1, 2, 9
Remove jumpers 3 to 8
Remove all jumpers
Printers and
operator
panels
no TTY passive Remove all jumpers
Galvanic
isolation via
optocoupler
CP 523 in a PLC
of the S5-U
range
no TTY passive Remove all jumpers
Galvanic
isolation via
optocoupler
s
CP 523 in an
S5-115F
yes
V.24
(RS-232-C)
TTY active
TTY passive
Plug in jumpers 1 to 9
Plug in jumpers 1, 2, 9
Plug in jumpers 3 to 8
Remove all jumpers
EWA 4NEB 811 6148-02
7-45
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