SIEMENS
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Siemens IK PI · 2015
PROFIBUS
Communication for SIMATIC S7-300
CP 342-5
3
■
Overview
•
PROFIBUS DP master or slave with electrical interface for
connecting the SIMATIC S7-300 to PROFIBUS at up to
12 Mbit/s (including 45.45 Kbit/s)
•
Communication services:
- PROFIBUS DP
- PG/OP communication (OP multiplexing)
- S7 communication (client, server)
- Open communication (SEND/RECEIVE)
•
Easy configuration and programming over PROFIBUS
•
Cross-network programming device communication through
S7 routing
•
Modules can be replaced without the need for a PG
■
Benefits
•
Expansion of the process I/O to SIMATIC S7-300 with several
PROFIBUS DP interfaces
•
Flexible use of the process I/O by means of dynamic
activation of DP slaves
•
Sub-process-oriented design of an automation solution
through the use of several CPs
•
Optimization of applications and a host of possible uses
thanks to active transmission of data with S7 communication
•
Extensive operator control and monitoring thanks to multiplex
function with OP communication
•
Suitable for closed-loop control tasks due to SYNC/FREEZE
■
Application
The CP 342-5 is the communications processor of the
SIMATIC S7-300 for the PROFIBUS DP bus system.
The CP 342-5 relieves the CPU from communication tasks.
Communication possibilities of the S7-300 using communication
modules:
•
As DP master or slave for PROFIBUS DP V0 according to
IEC 61158/EN 50170
•
Communication with programming devices and HMI devices
•
Communication with other SIMATIC S7 systems
•
Communication with SIMATIC S5 programmable controllers
The number of CPs that can be used is dependent on the per-
formance range of the CPU and on the communications services
used.
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Design
The CP 342-5 offers all the advantages of SIMATIC S7-300
system design:
•
Compact design;
single standard width of the SM modules of the
SIMATIC S7-300
•
9-pin Sub-D socket for connection to PROFIBUS
•
4-pin terminal block for connecting the external supply
voltage of 24 V DC
•
Simple assembly;
The CP 342-5 is mounted on the S7-300 DIN rail and
connected to adjacent modules by means of the bus
connectors. Slots 4 to 11 in subracks 0 to 3 (coupled through
the IM 360/361) can be used for the CP 342-5
•
In combination with IM 360/361, the CP 342-5 can also be
used in an expansion rack (ER)
•
User-friendly wiring;
Sub-D socket and the terminal block are easily accessible.
•
The CP 324-5 can be operated without a fan;
a back-up battery or a memory module is not required
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© Siemens AG 2014