DVP-ES3 Series Programming Manual Enable contact M0 M20=ON, indicating DST function is enabled. For the year 2017, the 2 nd Wednesday of May is 10 th May and the 3 rd Friday of September is 15 th September. The PLC system time adds 60 minutes when the date May 10 th arrives and subtracts 60 minutes when the date September 15 th arrives to end daylight saving time. D100=K2, indicating DST state is being read. Enable contact M1 Setting values and descriptions: _6 Use the instruction DST or HWCONFIG in ISPSoft to read the daylight saving state. The HWCONFIG converts the result from week number to the corresponding dates and months automatically.
6-502 Device Setting Value Description D0 3 The DST state is ON and in mode 2. D1 5 Starting month: May D2 2 Starting week number: the 2nd week D3 3 Starting day: Wednesday D11 9 Ending month: September D12 3 Ending week number: the 3rd week D13 5 Ending day: Friday D20 60 Duration: 60 minutes Device Setting Description Value D100 7 Function code is 4, indicating the DST state is ON and in mode 2. D101 5 Starting month: May D102 2 Starting week number: the 2nd week D103 3 Starting day: Wednesday D111 9 Ending month: September D112 3 Ending week number: the 3rd week D113 5 Ending day: Friday D120 60 Duration: 60 minutes M21 ON Node state is ON. API Instruction code Operand Function