Siemens SINUMERIK 840Di sl, Руководство по вводу в эксплуатацию

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PLC commissioning
6.7 Testing the PLC program
Manual
184
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Input syntax
Both the following tables show the input syntax of the fields Operand and Format of the PLC
status display.
Table 6-2 Input field: Operand
Syntax Description
En.x Input byte n, bit x
EBn Input byte n
EWn Input word n
EDn Input double-word n
DBn.DBXm.x Data block n, byte m, bit x
DBn.DBBm Data block n, byte m
DBn.DBWm Data block n, word m
DBn.DBDm Data block n, double word m
To Output n
Mn Flag n
Tn Timer n
Cn Counter n
Table 6-3 Input field: Format
Syntax Description
H Hexadecimal
D decimal
B Binary
G Floating point (only in conjunction with double word)
Monitoring
After entering the variable to be displayed in the field Operand using the syntax described
above, the actual value of the variable is displayed in the format you have set.
Controlling: Start
Use the softkey Change to switch over to the mode Control. Using the field Value the new
values for the displayed variables can now be displayed. The entered value must be within
the definition range of the set format.
Controlling: End
As long as the mode Control is active, the values entered are not imported. Only when you
quit the mode using the softkey Accept, the entered values are written to the variables and
processed in the PLC program.