Siemens ISI EN 50295 - Manual (Page 33)

Siemens IK PI · 2004 6/33
AS-Interface Master
Masters for SIMATIC S7
CP 142-2
6
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Overview
• Master connection for the distributed I/O system ET 200X at
AS-Interface through 12-pin connector
• Simple operation in the I/O address area of SIMATIC ET 200X
• No need to configure CP for AS-Interface
• Addressing of up to 31 AS-Interface slaves according to the
AS-Interface Specification V2.0
• Monitoring of the supply voltage on the AS-Interface shaped
cable
• Considerable increase in the number of inputs/outputs of the
ET 200X.
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Benefits
• In connection with the BM 147, the ET 200X enables PLC func-
tionality in degree of protection IP65
• Can also be used in a rugged industrial environment without
additional casing due to the high degree of protection IP67
• More flexible and extended application options of the ET 200X
thanks to considerable increase in available inputs/outputs
• Shorter startup times due to easy configuration at the press of
a button
• Reduction of standstill or service times in the event of a fault
through LED displays:
- status of the AS-Interface network
- connected slaves and their operational readiness
- monitoring of the AS- Interface voltage level
■
Application
The CP 142-2 enables the connection of the distributed I/O sys-
tem ET 200X to AS-Interface.
This module can be used to activate up to 31 AS-Interface
slaves and, if bi-directional slaves are implemented, up to 248
binary components.
Up to 6 CP 142-2 can be operated on the ET 200X.
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Design
• 16 byte inputs and 16 byte outputs are used in the address
space of the ET 200X
• Operating statuses displayed by LEDs in the frontplate
• Display of the connected and activated slaves and their oper-
ational readiness by LEDs
• One pushbutton for switching the operating status, entering the
existing configuration and switching the display
• Connection of the AS-Interface cable to M12 connector
• Monitoring of the supply voltage on the AS-Interface cable
■
Function
The CP 142-2 can be used in two operating modes:
• Standard mode with BM 141/BM 142/BM 147
• A maximum of all 124 input and output bits of the AS-Interface
slaves can be addressed.
• Extended mode with BM 147
A function call facilitates master calls in accordance with the
AS-Interface Specification V2.0 (e.g. writing parameters).
Calls are described in the manual. The manual also contains
program examples.
System configuration
Parameter assignment
The CP 142-2 is parameterized with STEP ® 7 basic package as
of V2.1. Separate configuration for AS-Interface is not necessary.
0 1
AS-Interface
AS-Interface shaped cable
AS-Interface
ET 200X with CP 142-2
G_IK10_XX_20013
PROFIBUS