Features:
- One Industrial Ethernet interface links the S7-300 station to the network.
- Open and S7 communication services share the configured processor connections.
- External 24 V DC and the 5 V backplane feed different module sections.
CPU communication jobs cross the S7-300 backplane before entering the network stack.
SEND/RECEIVE and FETCH/WRITE provide the documented S5-compatible exchange paths.
LAN initialization and front diagnostics support commissioning without combining network and CPU faults.
The Siemens 6GK7343-1EX11-0XE0 CP 343-1 Communication Processor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK7343-1EX11-0XE0 CP 343-1 Communication Processor Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Assigning controller jobs to the configured Ethernet service
- S7 communication: Configured S7 connections exchange controller and operator data.
- Open communication: ISO, ISO-on-TCP, TCP and UDP carry user-defined telegrams.
- S5-compatible blocks: SEND/RECEIVE and FETCH/WRITE expose the documented data paths.
- Multicast: Selected UDP traffic can be delivered to configured multicast groups.
Moving data from the rack backplane to the plant network
- Backplane side: The S7-300 bus transfers CPU communication jobs to the processor.
- Network side: One RJ45/AUI interface sends the resulting frames to Industrial Ethernet.
- Connection table: Configured partners and protocol types determine how each job is handled.
- Status separation: Processor diagnostics remain distinct from ordinary CPU program execution.
Powering controller and network sections through separate paths
- External input: A 24 V DC terminal supplies the communication processor electronics.
- Rack input: The S7-300 backplane provides the documented 5 V DC current.
- Wiring check: Both supplies must be present before network and rack operation can be evaluated together.
- Power indication: Front status identifies module supply before connection diagnostics are interpreted.
Establishing network parameters before communication starts
- LAN initialization: The processor accepts initial network settings through the Ethernet path.
- Project data: Connection parameters must match the S7 engineering configuration.
- Partner check: Remote IP and protocol definitions are verified for each configured connection.
- Diagnostics: Expanded records separate address, link and communication-job conditions.