SIEMENS
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Siemens IK PI · 2015
PROFIBUS
Communication for SIMATIC S7-1200
CM 1243-5
3
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Design
The CM 1243-5 offers all the benefits of the S7-1200 design.
•
Rugged, compact plastic enclosure
•
Easily accessible connection and diagnostics elements,
protected by front flaps
•
Removable connecting terminals
•
Simple mounting on the mounting rail of the S7-1200
•
9-pin sub-D socket for the bus interface to PROFIBUS
•
3-pin plug-in terminal strip for connection of the 24 V DC
external supply voltage
The CM 1243-5 is plugged into the left-hand system bus
interface of the S7-1200. The power is supplied via a 3-pin
terminal strip on top of the module. The rugged RS485 interface
is located on the underside of the module, protected by the
lower front flap.
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Function
The CM 1243-5 provides access to different communication
services on the basis of PROFIBUS:
•
PROFIBUS DP (according to IEC 61158, master)
•
PG/OP communication
•
S7 communication
PROFIBUS DP master
The CM 1243-5 works as a DP-V1 master in accordance with
IEC 61158, handles data traffic completely autonomously, and
thus relieves the CPU of communication tasks.
The data areas of the distributed I/Os are transferred consis-
tently between CP and CPU. As a DP master, it allows the
connection of up to 16 PROFIBUS-compliant DP slaves
PG/OP communication
The S7-1200 to which the CM 1243-5 is connected can be
programmed with the help of PG/OP communication.
S7 communication
Communication with the following other systems can be imple-
mented with the mechanisms familiar from the S7 world (Put/Get)
on the basis of S7 communication:
•
To other SIMATIC S7 programmable controllers
•
To HMI devices
•
To PCs, laptops, field PGs with PROFIBUS cards
Diagnosis
Extensive diagnostic options are available via STEP 7, including
•
Operating state of the CM
•
General diagnostics and statistics functions
•
Connection diagnostics
•
Message buffer
STEP 7 Basic V11 or higher is required for configuring the full
functional scope of the CP 1243-5.
Operator Control &
Monitoring
SIMATIC S7-1200
with CM 1243-5
G_IK10_XX_50105
PROFIBUS
PG/PC/IPC
SINAMICS
ET 200S
© Siemens AG 2014