Entry type: Product note, Entry ID: 13740051, Entry date: 12/11/2002

CP 343 -1 Firmware Update V2.1 (6GK7343-1EX11-0XE0)  

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The CP 343-1 module (6GK7343-1EX11-0XE0) is now available with the new firmware version V2.1. Existing CPs 343-1 (6GK7343-1EX11-0XE0) with version 2.0 can be upgraded by means of a free firmware update (Download ID: 13713337). We recommend upgrading of earlier versions of the CP 343-1 (6GK7343-1EX11-0XE0) if any problems are encountered!

The CP 343-1 module (6GK7343-1EX11-0XE0) is now available with the new firmware version V2.1.
The new firmware version V2.1 can be downloaded from the Internet for existing modules. Firmware version V2.1 succeeds version V 2.0 and contains a number of error corrections.

With the update the CP remains functionally compatible with the earlier version. It can therefore be configured with the same STEP 7 / NCM version (select 6GK7343-1EX11-0XE0, V2.0, in HW-Config). Upgrading of  STEP7 or NCM is not necessary if the compatible functions are used.

The following applies in the case of a spare part replacement: An existing CP can be replaced without a PG, by simply replacing the module (data are saved on the CPU)!
It is not necessary to use the latest version of STEP 7.

Earlier CPs, e.g. 6GK7343-1EX00-0XE0 or predecessor, or IT CPs (6GK7343-1GX00-0XE0) cannot be upgraded with this firmware.

Added functions:
- ARP to itself upon module startup. In the case of a replacement of the module this will inform possible routers of the MAC address.

- Double IP addresses in the LAN (CP to other network nodes) are identified and documented with a diagnostic buffer entry.
Important: Despite this new function, double addressing is not permitted and can lead to communication problems! The double address must definitely be eliminated.

- The configured default router address can be temporarily switched by means of an ICMP Redirect Message. The new feature is that the default router address is restored after 30 seconds. The display in STEP7/NCM diagnostics has been suitably expanded. The configured and the the currently used router address are now displayed.

- After a factory reset coming from the NCM diagnostics the event is now documented in the diagnostic buffer.

Error corrections:

1.) Dynamic switching of the router used after reception of an ICMP Redirect Message.
2.) Parameterization of the LAN controller at 10 Mbit/s full duplex is now processed correctly.
3.) Diagnostic buffer entry (low diagnostic level) and preventive software workaround against
     malfunction of the LAN controller (only 100 Mbit/s full duplex).
4.) Correction of the Keep Alive message frame. The connection to various UNIX variants and
     WINDOWS operating systems is now processed correctly in all cases.
5.) Suppression of the ICMP Router Solicitation Message (from CP to routers).
6.) Problems with the establishment of  RFC 1006 connections after voltage failures.
7.) In the case of fetch jobs the correct contents and data lengths are now returned in the target
     area TIMER or COUNTER.
8.) The communication of UDP Multicast will no longer be disturbed if an ICMP message
     Destination Unreachable is received.
9.) The Lifelist on Ethernet will now be displayed correctly in all cases.
10.) In the case of TCP connections the attempt at establishing a connection will be
        acknowledged negatively within the Frozen Time.

Please get in touch with your SIMATIC contact at your local Siemens office if you have any further questions.