Operate (DNP function code 4) The operate function code is used to activate one or more control or analog outputs at an Outstation. A matching message using the select function code must previously have been received, and the arm timer must still be active before the activation will take place Operate (DNP function code 4) Direct Operate (DNP function code 5) The direct operate function code is used to activate one or more outputs or setpoints at an Outstation.
A preceding select message is not required. Direct Operate (DNP function code 5) Direct Operate No Acknowl..........
원문 링크 : DNP Function Codes 3
