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S5-95U, Second Serial Interface
1
Description of the System
This section contains information on the following:
•
Performance range and the advantages which the second serial interface offers to you
•
Devices you can connect to the second serial interface
•
Criteria according to which you can determine the "correct" communications mechanism for
your specific application
•
Features of the communications mechanisms
•
Special features to be considered when operating two serial interfaces
•
Display and control elements of the PLCs and the assignment of the SI2 interface.
The flexibility of a logic control is of great importance for the productivity of a manufacturing plant.
To achieve a high degree of flexibility, complex control functions can be distributed among several
devices.
This means
•
You obtain small and handy units. You can easily configure, commission, diagnose, modify,
operate and monitor the overall process
•
You have a better control of your plant because when one unit fails, the remaining system can
continue to work.
When distributing the control functions among several devices, the information flow between the
individual devices must be guaranteed in order
•
to exchange data between individual programmable controllers,
•
to monitor, operate and control manufacturing plants centrally,
•
to be able to compile management information (e.g. production and stock data).
For these reasons, the S5-95U programmable controller with two serial interfaces has been
developed as a variant of the S5-95U basic unit.
The second serial interface provides the following communication possibilities:
•
Communication via the SINEC L1 local area network (LAN)
•
Point-to-point link (SINEC L1 protocol)
•
Computer link with the 3964(R) transmission protocol
•
ASCII driver, e.g. for visualization of process sequences
•
Programmer functions for operator control and monitoring of processes
The second serial interface offers the following advantages:
•
Parallel operation of programmer and operator panel at the S5-95U is possible
•
Parallel operation of programmer/operator panel and SINEC L1 at the S5-95U (slave) is possible
•
Parallel operation of programmer/operator panel and interfacing with a further partner is possible
via:
- Point-to-point link (SINEC L1 protocol)
- Computer link with 3964(R) transmission protocol
- ASCII drivers
•
Low-cost interface to a further PLC (SIMATIC S5) via point-to-point link
e.g. S5-95U with S5-100U (CPU 102); no CP required
•
Simple connection to SIEMENS devices via computer link
e.g. S5-95U with SICOMP PC
•
Simple connection to third-party devices via ASCII driver
e.g. connection of a barcode reader to an S5-95U
EWA 4NEB 812 6095-02
Description of the System
1-1
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