Iec 104 Communications Start-Up; Commreq Status Word Codes; Security - GE PACSystems RX3i User Manual

6.8 IEC 104 Communications Start-up

The EIS001 module will power up and signal the user program through LIS bit 11 that it is ready to
receive the configuration parameters as defined in the ST block. LIS bit 11 and LIS bit 13 (LAN OK) are
used together in the user program to execute the one-shot signal to configure the module with its
parameters.
LAN Interface Status (LIS) bits 10, 11, and 12 are reserved for use with Ethernet applications. Only LIS
bit 11 is used with the IEC 104 Server; reference the status information below for operational details.
LIS bit 11 Description
0 IEC 104 Server is not executing.
1 IEC 104 Server is executing and is ready for configuration.

6.9 COMMREQ Status Word Codes

After power-up of the RX3i controller, the status of the IEC 104 Server can be checked in the
COMMREQ Status Word. Refer to the table below for status code values and descriptions.
Status Code Description
1 Successful configuration of the IEC 104 Server.
40592 Warning: The IEC 104 Server is already configured and operating.
16#C090 Error: In a redundancy application an attempt was made to configure an IEC 104
Server in an inactive (backup) CRU-type CPU.

6.10 Security

The IEC 104 protocol implemented in the EIS001 module is not explicitly secure; nor is the access to
Controller memory explicitly secure. Steps must be taken to secure the network from unauthorized
control, interception, or access to the IEC 104 communications. Steps must also be taken to secure
the Controller from unauthorized access or control using the security features found in the latest
released versions of Proficy Machine Edition 8.5 Sim9 and PACSystems RX3i CPU firmware.
GEIP strongly recommends that the IEC 104 Write/control memory NOT be permitted to be directly
connected to control devices. Such devices should also be protected from direct access using the
security features found in the latest released versions of Proficy Machine Edition and PACSystems
RX3i CPU firmware. Consult GEIP technical support for more information.
GEIP also strongly recommends that the EIS001 modules, in all instances, be updated with the latest
released version of EIS001 firmware to ensure all available security enhancements are present.
Firmware updates may be obtained at
GFK-2949C
Chapter 6. Configuration of IEC 104 Server Parameters Using COMMREQ
http://support.ge-ip.com.
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