Specifications
AS-Interface
Masters
CP 343-2 P
2/20
Siemens LV 1 · 2007
2
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Overview
The CP 343-2 P is the AS-Interface master for the SIMATIC
S7-300 programmable controller and the ET 200M distributed
I/O station. The communications processor performs the follow-
ing functions:
• Supports the configuration of the AS-Interface network
with STEP 7 V5.2 and higher
• Connection of up to 62 AS-Interface slaves and integrated an-
alog value transmission (according to the extended AS-Inter-
face Specification V2.1)
• Supports all AS-Interface master functions according to the
extended AS-Interface Specification V2.1
• Fault indications (e.g. AS-Interface voltage fault, configuration
fault) by means of LEDs in the front panel
• Compact enclosure in the design of the SIMATIC S7-300
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Benefits
• Improved plant documentation and support for service as-
signments thanks to documentation of the AS-Interface con-
figuration in the STEP 7 project
• Provides diagnostics of the AS-Interface networks
• Shorter start-up times through simple configuration at the
press of a button
• Construction of flexible distributed structures by use in the
DP slave ET 200M
• Reduction of standstill and servicing times in the event of a
fault thanks to the LED indicators:
- Status of the AS-Interface network
- Slaves connected and their readiness for operation
- Monitoring of the AS-Interface mains voltage
• Lower costs for stock keeping and spare parts because the
CP can be used for the SIMATIC S7-300 as well as for the
ET 200M
• Well suited also for complex applications thanks to connection
options for 62 slaves and integral analog value processing
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Application
The CP 343-2 P is the AS-Interface master connection for the
SIMATIC S7-300 and the ET 200M. Through connection to
AS-Interface it is possible to access max. 248 DI/186 DO per CP.
With the integrated analog value processing it is also possible to
evaluate very simple analog signals (per CP on max. 31 analog
slaves with four channels each).
CP 342-2 functionality was adopted unchanged for the CP 343-
2 P. An old S7 user program can thus be used without restrictions
with the new CP. In addition it is possible to download or upload
the AS-Interface configuration with STEP 7 hardware configura-
tion.
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Selection and ordering data
Version DT Order No. Price
per PU
PU
(UNIT,
SET, M)
PS* PG Weight
per PU
approx.
kg
CP 343-2 P communications processors A
6GK7 343-2AH10-0XA0 1 1 unit 541 0.262
for connection of SIMATIC S7-300 and ET 200M
to AS-Interface, without front connectors
Front connectors } 6ES7 392-1AJ00-0AA0 1 1 unit 230 0.069
20-pole, with screw-type contacts
Manuals CP 343-2 and CP 343-2 P
including software (FC) and examples
Paper version
•German X 6GK7 343-2AH00-8AA0 1 1 unit 540 0.839
•English X
6GK7 343-2AH00-8BA0 1 1 unit 540 0.832
• French X
6GK7 343-2AH00-8CA0 1 1 unit 540 0.813
• Spanish X
6GK7 343-2AH00-8DA0 1 1 unit 540 0.827
• Italian X
6GK7 343-2AH00-8EA0 1 1 unit 540 0.830
Electronic manuals B
6GK1 975-1AA00-3AA0 1 1 unit 540 0.017
Communications systems, protocols, products
On CD-ROM
German/English
* You can order this quantity or a multiple thereof.
© Siemens AG 2007