Beifu PLC obtains system time, local time, current time zone and system time zone conversion through program

This article explains TwinCAT To get the local 、 System time and current time zone , And explain how the current time is converted into a string type .

1. Operation process
   1.1. Get system time
   1.1.1. GETSYSTEMTIME
   Use to GETSYSTEMTIME Function block , What you get here is Greenwich mean time . Use this block to read the operating system timestamp . The time stamp is a 64 Bit integer value , Accuracy of 100ns, Every time PLC Will be updated when called . Among other purposes , It can also be used for timing tasks or time measurement . One unit is equivalent to 100 nanosecond . The reason for implementing this service as a block rather than a function , The reason is simple , Because you have to return two values , According to the definition , This is a function that cannot be completed .
   
   1.1.2. The system time is converted to a string String
   Need to use FILETIME_TO_SYSTEMTIME and SYSTEMTIME_TO_STRING
   
   
   
   1.2. Get local time
   1.2.1. NT_GetTime
   This function block is used to obtain the local time , Time obtained in TIMESTRUCT Data structure output ：