PACSystems™ RX3i DNP3 Outstation User Manual
Section 5
GFK-3103B
June 2020
System Operation
72
5.14.2
Service Request Sub-function
–
START(0x00)
This function starts the DNP3 Outstation with the provided configuration parameters for CPE115.
Note:
1.
This request can only be successfully performed when the DNP3 Outstation is in a READY TO START
state after power-on / has been stopped using a service request STOP. The controller will set the
corresponding status bit (RUNNING) in the DNP3 Outstation status if the command has been
handled successfully.
2.
If DNP3 is configured using the SVC_REQ, it is recommended to start the DNP3 Outstation first,
and then followed by other protocols such as SRTP & Modbus/TCP Client.
When resuming from STOPPED to READY_TO_START state using a service request the dynamic (or run-
time) changes made to the configuration parameters will not be effective. To enforce modified
configuration data, it is mandatory to follow the sequence of STOP
→
CLEAR
→
START commands
using service request.
Table 29: Parameters for START sub-function service request
Parameter
Summary
Data Direction
(LD perspective)
16#0002
DNP3
Outstation
Protocol
IN
16#0000
START Request
IN
133 Words of
Configuration
Data
DNP3
Configuration
Data
IN
The use of the START sub-function code in a ladder diagram is illustrated in the following example. If
the SVC_REQ does not pass power, it indicates a failure.
Note: In this example, an ST block is used to copy the configuration parameters to the memory area
(%R) used by the Service Request.
Example
Figure 21: START Service Request