S5-95U, Second Serial Interface ASCII Driver
4 ASCII Driver
This section covers the following:
• Possible communication partners for the S5-95U
• How to connect communication partners to the SI2 interface
• Data traffic via the ASCII driver
• Parameter assignment of the PLC
• PLC program for the ASCII driver (example).
The ASCII driver is ideal for communication between an S5-95U and a third-party device since data
transmission does not comply with any standardized protocol such as the computer link with
3964(R) transmission protocol. The ASCII driver therefore offers a comparatively low degree of data
integrity. Flexible setting of the transmission format is possible with the ASCII driver and the S5-95U
can therefore easily be adapted to the communication partner.
The ASCII driver is used for interfacing two communication partners. The communication partners
are equal, i.e. every partner can send data independently without any request from the other partner.
The ASCII driver can only function over the second serial interface of the S5-95U (SI2).
Figure 4-1 Communication Partners if the ASCII Driver is Used
S5-95U
Third-
party
device
Special cable ( Section 4.1)
The ASCII driver is especially suitable for visualization of process sequences, e.g. for output of
message texts on a printer.
The following devices can be used as communication partners for the S5-95U:
• Various printers (e.g. PT 88, DR 210, DR 211)
• Terminals
• Barcode reader
•PC
Note
If the ASCII driver is activated, no other functions are possible at the SI2 interface (e.g.
programmer/operator panel).
Proceed as follows for startup of the S5-95U:
Link the S5-95U with the communication partner via the SI2 interface ( Section 4.1).
Select Data Set Ready on the communication partner.
Parameterize the ASCII driver in DB1 of the S5-95U ( Section 4.2).
Enter the PLC program in the programmer (example Section 4.5).
Transfer DB1 and the PLC program to the S5-95U.
Switch the mode selector of the S5-95U from STOP to RUN.
Also note Section 4.2 ”Starting up a System” in the S5-90U/S5-95U System Manual.
EWA 4NEB 812 6095-02
4-1
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