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Chapter 3 Creating and Editing Screens
GETHISTORY (Get History Data)
Equation
Var1 = GETHISTORY (Var2, Var3, Var4, Var5, Var6)
Explanation
This command is used to get the history data.
Var1 is the internal memory address where the data length is storeed.
Var2 is the internal memory, constant, the buffer number of history buffer area.
Var3 is the internal memory, constant, the starting address for sampling.
Var4 is the internal memory, constant, the points for reading.
Var5 is the internal memory, external controller address where the data is stored.
Var6 is the internal memory, constant, the data type for reading.
Remark
Var1 can be internal memory only.
Var2, Var3 and Var4 can be internal memory or constant.
Var5 can be the external controller address or internal memory.
Var6 can be internal memory or constant.
0: Data, 1: Time, 2: Time and Data
Example
When the equation is set to $0 = GETHISTORY ($1, $2, $3, $4, $5), HMI can get the
history data.
3-374 Revision May, 2010