Siemens SIMATIC S5-115U, User Manual

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S5-115U Manual System Overview
1.3.1 Centralized Configuration
A centralized configuration allows you to connect up to three EUs to one CC. The interface
modules for this purpose connect bus lines and supply voltage to the EUs. The EUs in such configu-
rations therefore need no power supplies of their own. The cables between the individual
controllers have a total maximum length of 2.5 m (8.2 ft.).
1.3.2 Distributed Configuration
A distributed configuration allows you to relocate expansion units nearer to the sensors and
actuators of your machine.
Distributed configurations reduce cabling costs for these devices.
1.4 Communications Systems
Controller flexibility is critical to manufacturing productivity. Complex control tasks can be divi-
ded and distributed over several controllers to achieve the greatest flexibility possible.
Distribution offers the following advantages:
•
small units that are easier to manage. You can plan, start up, diagnose, modify, and operate
your system more easily, and observe the entire process more easily
• enhanced system availability because, if one unit fails, the rest of the system continues to
function
Information must flow between distributed controllers to ensure the following:
•
data exchange between programmable controllers
• central monitoring, operation, and control of manufacturing systems
• collection of management information such as production and warehousing data
For this reason, we offer the following communications facilities for the S5-115U programmable
controller:
•
Point-to-point connection with the CP 524 and CP 525 communications processors
• Local area network communications via the SINEC L1 network
• Industrial Ethernet
• PROFIBUS
• Point-to-point connection with the CPUs 943 and 944
• ASCII interface (in CPU 943 and CPU 944) for connecting printer, keyboard, etc.
• Computer connection with 3964/3964R protocol (in CPU 944)
1.5 Operator-Process Communication, Monitoring, and Programming
Today, users expect good process visualization with the capability to intervene where necessary.
Previously, they had to hard wire indicating lights, switches, potentiometers, and pushbuttons,
even for simple requirements. For more complex processes, they had to use expensive video
display terminals. Inflexible or expensive solutions are a thing of the past.
EWA 4NEB 811 6130-02b
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