SIEMENS
3/156
Siemens IK PI · 2015
PROFIBUS
Communication for SIMATIC S7-1500
CM 1542-5
3
■
Overview
The CM 1542-5 communication module expands the
SIMATIC S7-1500 controller with an additional PROFIBUS
connection for communication with lower-level PROFIBUS
devices in bandwidths from 9.6 kbps to 12 Mbps. The module
also allows the implementation of separate PROFIBUS lines;
in other words, the control of multiple field devices via several
PROFIBUS segments. The CM 1542-5 assumes all communi-
cation tasks, thus reducing the CPU workload.
The CM 1542-5 is suitable for S7 communication as well as for
conventional PROFIBUS communication. This makes it possible
to establish communication between the S7-1500 controller and
other devices, for example those from the SIMATIC S7-300/400
range.
•
PROFIBUS DP master or DP slave with electrical interface for
connecting the SIMATIC S7-1500 to PROFIBUS at up to
12 Mbit/s (including 45.45 Kbit/s)
•
Communication services:
- PROFIBUS DP
- PG/OP communication
- S7 communication
•
Time synchronization
•
Simple programming and configuration over PROFIBUS
•
Cross-network PG communication using S7 routing
•
Module replacement without a PG
•
Data record routing (PROFIBUS DP)
•
Adding or modifying distributed I/O during operation
■
Benefits
•
Particularly suitable for closed-loop control tasks thanks to
SYNC/FREEZE and constant bus cycle
•
Sub-process-oriented design of an automation solution
through the use of several CMs
•
Universal application of the CM due to the parallel use of
different communications services on one CM
■
Application
The CM 1542-5 is the communications processor of the
SIMATIC S7-1500 for the PROFIBUS bus system. It relieves the
CPU of communication tasks and supports additional connec-
tions.
Communications options of the S7-1500 using communication
modules:
•
As master for PROFIBUS DP 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 CMs that can be operated depends on the CPU
type and on the communication services used.
■
Design
The CM 1542-5 communication module features all the advan-
tages of the SIMATIC S7-1500 design:
•
Compact design:
- 9-pin D-sub socket for connection to PROFIBUS DP
- The module is supplied with power via the integrated
backplane bus
- Three LEDs to indicate the operational and communication
status
•
Simple installation:
The CM 1542-5 is mounted on the rail of the S7-1500 and
connected to the other modules of the S7-1500 by means of
bus connectors. The slot rules of the S7-1500 system apply.
•
User-friendly wiring:
the D-sub socket is easily accessible and simple to use.
•
The CM 1542-5 can be operated without a fan. A backup
battery is not required.
•
The module can be replaced without the need for a
programming device.
G_IK10_XX_10148
S7
PG/OP
FMS
DP-S
DP-M
© Siemens AG 2014