Siemens EN 50295 Benutzerhandbuch
Siemens IK PI · 2004
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AS-Interface Master
Masters for SIMATIC S7
CP 243-2
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Overview
The CP 243-2 is the AS-Interface master for the new generation
of SIMATIC S7-200. The communications processor (6GK1 243-
2AX01-0AX0) supports the expanded AS-Interface specification
V2.1 and has the following functions:
of SIMATIC S7-200. The communications processor (6GK1 243-
2AX01-0AX0) supports the expanded AS-Interface specification
V2.1 and has the following functions:
• Connection of up to 62 AS-Interface slaves and integrated an-
alog value transmission (according to expanded AS-Interface
Specification V2.1)
Specification V2.1)
• Supports all AS-Interface master functions according to ex-
panded AS-Interface Specification V2.1
• Display of operating status and operational readiness of the
connected slaves through LEDs in the frontplate
• Display of errors (incl. AS-Interface voltage errors, configura-
tion errors) through LEDs in the frontplate
• Compact housing in the design of the innovative SIMATIC
S7-200 generation
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Benefits
• More flexible and extended application options of the SIMATIC
S7-200 due to the considerable increase in the available digital
and analog inputs/outputs
and analog inputs/outputs
• Shorter startup times due to easy configuration at the press of
a button
• In the event of a fault, shorter standstill and service times due
to LED indication of:
• Status of the CPs
- connected slaves and their operational readiness
- monitoring of the AS-Interface voltage level
- monitoring of the AS-Interface voltage level
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Application
The CP 243-2 is the AS-Interface master connection exclusively
for the CPUs 22x of the innovated SIMATIC S7-200 generation.
By connecting to AS-Interface, the available digital inputs and
outputs for S7-200 are significantly increased (max. 248 DI /
186 DO on AS-Interface per CP).
for the CPUs 22x of the innovated SIMATIC S7-200 generation.
By connecting to AS-Interface, the available digital inputs and
outputs for S7-200 are significantly increased (max. 248 DI /
186 DO on AS-Interface per CP).
In addition, the integrated analog value processing also makes
analog values (per CP max. 31 analog slaves, each with up to
4 channels) available to the S7-200 at the AS-Interface. Up to
two CP 243-2s can be operated simultaneously on the S7-200.
analog values (per CP max. 31 analog slaves, each with up to
4 channels) available to the S7-200 at the AS-Interface. Up to
two CP 243-2s can be operated simultaneously on the S7-200.
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Design
The CP 243-2 is connected to the S7-200 like an expansion
module. It features:
module. It features:
• Two terminals for direct connection of the AS-Interface cable
• LEDs in the front panel for displaying the operating status and
the operational readiness of all connected and activated
slaves
slaves
• Two pushbuttons for displaying the status information of the
slaves, for switching the operating status and entering the
existing ACTUAL configuration as the SETPOINT configuration
existing ACTUAL configuration as the SETPOINT configuration
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Function
The CP 243-2 supports all functions stipulated in the expanded
AS-Interface Specification V2.1. Double address assignment
(A-B) makes it possible to operate up to 62 digital or 31 analog
slaves at the AS-Interface.
AS-Interface Specification V2.1. Double address assignment
(A-B) makes it possible to operate up to 62 digital or 31 analog
slaves at the AS-Interface.
Access to analog values is just as easy as access to digital val-
ues, thanks to the integrated analog value processing.
ues, thanks to the integrated analog value processing.
The CP 243-2 occupies one digital input byte (status byte), one
digital output byte (control byte) and 8 analog input and 8 analog
output words in the process image of the S7-200. This means
that the CP 243-2 occupies two slots. The operating mode of the
CP 243-2 can be set with the status and control byte through the
application program.
digital output byte (control byte) and 8 analog input and 8 analog
output words in the process image of the S7-200. This means
that the CP 243-2 occupies two slots. The operating mode of the
CP 243-2 can be set with the status and control byte through the
application program.
Depending on the operating mode, the CP 243-2 either stores
the I/O data of the AS-Interface slaves or diagnostic values in the
analog address space of the S7-200 or enables master calls
(e.g. readdressing of slaves).
the I/O data of the AS-Interface slaves or diagnostic values in the
analog address space of the S7-200 or enables master calls
(e.g. readdressing of slaves).
All connected AS-Interface slaves are configured at the press of
a button. No further configuration of the CP is necessary.
a button. No further configuration of the CP is necessary.