Jetter JVM-407B-HMI, User Manual

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JVM-407B Programming
Memory for non-volatile application program variables
Non-volatile variables are used to store data which must be maintained when
the JVM-407B is de-energized.

Global variables which are assigned to permanent registers (%RL)

Variables are stored in a compact way.
 Size: 120,000 bytes
 Register numbers: 1,000,000 ... 1,029,999

By JetSym
 From HMIs
 From the application program
The following program increments the content of four non-volatile variables
every second.
The working range of the counters is between 0 and 255 (variable type: byte).
For these four variables the four bytes of register 1000010 are used.
Var
Cnt1, Cnt2, Cnt3, Cnt4: Byte At %RL 1000010 ;
End_Var ;
Task Count4 Autorun
Loop
Inc(Cnt1);
Inc(Cnt2,
2 );
Inc(Cnt3, 5 );
Inc(Cnt4, 10 );
Delay( T#1s );
End_Loop ;
End_Task ;
The JetSym setup pane displays the content of the variable. As the type of the
four counters is byte, this will result in counter overflow after a relatively short
time:
Number Description Function
1
Current content of the
variable Cnt1
The content of the variable is incremented by
one every second.
Introduction
Characteristics
Memory access
JetSym STX program
Setup pane