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171CCC9x030 M1E Processor IEC Exec. Upgrade to v.1.27e

Goals and Symptoms

The purpose of this resolution is to inform Momentum M1E users that the IEC Exec. has been upgraded to version 1.27e for Concept 2.6.

Facts and Changes

Exec. v.1.27e resolves the following 3 issues:

  • Version 1.27 no longer sets the PSH flag in the FIN or SYN. Communications to a TBox PLC would not work properly because the M1E would set the PSH flag in the FIN. Version 1.26e set this flag in the FIN. Versions prior to 1.26e set this flag in the SYN.
  • Every time a TCPIP MSTR block was activated, the 'TCP Retry' counter in the Ethernet Statistics web page would increment. Version 1.27e will not increment the TCP Retry counter when the MSTR block is activated.
  • The M1E Ethernet port would lockup if the PLC exceeded its watchdog timer (WDT) value with the constant sweep function enabled. The Ethernet port lockup is resolved in v.1.27e.

Causes and Fixes

The following Momentum M1E processors are affected:

  • 171CCC96030
  • 171CCC98030

    The processors are field upgradeable using the Exec Loader Utility found in Concept programming software.
    Note: It is recommended to power cycle the M1E immediately after downloading an Exec. and before loading a configuration.
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