Chapter 6 Applied Instructions Adds 4 to the function codes in S , after the daylight saving state is read. For example, after the daylight saving state is read, the function codes 0, 1, 3 become 4, 5 and 7. When the DST state is OFF, the operand and descriptions are shown below. When the DST state is ON and in mode 1, the operand and descriptions are shown below. When the DST state is ON and in mode 2, the operand and descriptions are shown below. 6_ 3. This instruction is to enable / disable the daylight saving time function. Whether the contact is normally open or close will not affect the daylight saving time setting.
(refer to example 2 for more details on how to switch the contact M0 OFF=>ON) You can reset the daylight saving time by executing the instruction again. There is no need to disable and then enable this function to reset the daylight saving time. 4. When setting the daylight saving time to start on April 1 st and to end on September 1 st , and the duration is 60 minutes; the real-time clock goes like below. 6-497 Operand Description S Function code is 4, indicating the DST state is OFF. S1- S5 Invalid operand D DST state is OFF. Operand Description S Function code is 5, indicating the DST state is ON and in mode 1.
S1 The month to start daylight saving time S2 The date to start daylight saving time S3 The month to end daylight saving time S4 The date to end daylight saving time S5 Time that changed due to daylight saving time; unit: minute D The DST state is ON (enabled). Operand Description S Function code is 7, indicating the DST state is ON and in mode 2. S1 The month to start daylight saving time S2 S2+1 S2: settings for the week to start daylight saving time S2+1: on which weekday of the S2 S3 The month to end daylight saving time S4 S4+1 S4: settings for the week to end daylight saving time S4+1: on which weekday of the S4 S5 Time that changed due to daylight saving time; unit:
minute Operand The DST state is ON (enabled).