Emerson PACSystems RX3i User Manual page 37

User Manual
GFK-2911E
An ST block simplifies the mechanics of the COMMREQ instruction which, when used to
initialize the DNP3 Outstation, conveys 114 configuration parameters from the user's
application program to the EDS001 Module. It contains both required and optional
parameters for DNP3 Outstation functionality. Note that any change to the values must be
re-sent via COMMREQ to a freshly booted EDS001 module. Resetting the EDS001 can be
accomplished by using Service Request 24 (refer to PACSystems RX7i and RX3i CPU
Programmer's Reference Manual, GFK-2950).
In the ladder example a one-shot is employed to ensure the ST block is executed only once
following power-up or following a restart of the CPU. Before downloading the parameters,
the logic waits until the EDS001 module signals that it is ready to accept its DNP3 Outstation
parameters.
Figure 13: Ladder Logic used to Configure DNP3 Outstation Parameters
The DNP3 Firmware version can be checked as defined in the COMMREQ configuration for
Outstation status space described in Section 6.3.1 For details, refer to Appendix A:,
Definition of the Status Area. The Major and Minor version for DNP3 Firmware is available in
the offset 1 (Ver_1word) and 2 (Ver_2word) respectively. The screen capture (Figure 14)
displays the DNP3 Firmware version.
Figure 14: Reading the Firmware Version
Alternatively, the DNP3 firmware version can also be checked via Station Manager
Command – stat a, as shown in Appendix B:.
The ETM001 firmware version can be found using the Ethernet online command as:
Target---> Online Commands --->Show Status...----->Details
Configuration of DNP3 outstation Parameters
Chapter 6
Sep 2019
31