09/02 Features and functions
CP 243-1
J31069-D0428-U001-A1-7618
9
2 Features and functions
2.1 Overview
The CP 243-1 features the following functions:
• S7 communication
− Performant data communication via Industrial Ethernet. Communication is
based on standard TCP/IP
− Ethernet access via an RJ45 socket
− Simple connection to an S7-200 system via the S7-200 backplane bus
− Facilitates a flexible and distributed automation structure
− Remote programming, configuration and diagnostics of an S7-200 system
(e.g. program upload and download or status displays) via Industrial
Ethernet and STEP 7 Micro/WIN 32.
− Basis for simple further processing and archiving of process data
− Enables simultaneous communication with up to 8 S7 controllers
− Provides a connection to S7-OPC
− Simple network administration
− Modules can be exchanged without requiring repeat program-
ming/configuration (plug & play)
− S7 communication services, "XPUT/XGET", as client and server
− S7 communication services, "READ/WRITE", as server
• Watchdog timer
The CP 243-1 is equipped with a Watchdog circuit. The Watchdog starts each
time CP 243-1 starts up. Typically, the Watchdog monitoring time is 5 s. Due to
component-related tolerances, this time can increase to 7 s. If the Watchdog
monitoring time sets in, a reset of the CP 243-1 is automatically brought about.
This restarts the CP 243-1. During this time, the CP 243-1 reports a "Parity Er-
ror" to the S7-200 CPU. Handling of this type of error is described in the STEP 7
Micro/WIN 32 documentation.
• Address assignment via preset MAC address (48 bit value).
The MAC address is assigned to each CP 243-1 at the factory. It is printed on a
label affixed to the underside of the upper enclosure cover.
An IP address can be assigned to the CP 243-1 via the preset MAC address us-
ing the BOOTP protocol.
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