APARIAN A-DNP3R, Руководство пользователя

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DNP3 Operation
Document No. D109-010 Page 69 of 108
Revision 1.15
The RequestPending bit in the mapped Logix Tag for the control command will be set,
indicating that a new operate command was received. The Outstation Controller should copy
the values Command UDT to the respective Status UDT (Binary: Group 12 to 10, Analog: Group
41 to 40). Then clear the
RequestPending bit which signals the master that the operation is
complete. The Outstation Example contains AOIs that perform these tasks. Including code to
pulse binary outputs. Commands with
StatusCode other than zero should be ignored.
Figure 5.6 – Outstation Mapping for Output Commands
Care should be taken to ensure the matching Analog Variations are used with Group 40 and
41.
To ensure the command was executed, the master can either read the Output Status (Groups
10, 40) or configure an event on the Status and Command groups.
5.2.2. S
ENDING
O
UTPUT
C
OMMANDS
When the DNP3 Router is in Scheduled (Master) mode the Logix mapped Tag will be read at
the configured scheduled interval, but only once the
RequestPending bit is set will the operate
command be executed and sent to the DNP3 outstation. The automatic clearing of
RequestPending bit provides Confirmation that the command executed correctly.
Figure 5.7 – Master Mapping for Output Commands
The master can either read the Output Status directly or process the resulting event to obtain
the status of the output.
5.3. COUNTER FREEZE COMMANDS
When the DNP3 Router operates in Reactive Mode it will respond to Freeze commands from
the DNP3 Master. If the DNP3 Master issues a Freeze command the Logix controller will be