06.03
8.4 Testing the PLC program
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Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
8.4.4
Monitor/control using HMI Advanced
Use the soft keys Operating Area Switchover > Diagnosis > PLC Status to
call the dialog box PLC Status Display.
The dialog PLC Status Display serves to monitor and control variables of:
S
Inputs, outputs, flags, timers and counters
S
Contents of data blocks
The following two tables show the input syntax of the fields: Operand and
Format of the PLC status display.
Table 8-2
Input field: Operand
Syntax
Meaning
En.x
Input byte n, bit x
IBn
Input byte n
IBn
Input word n
IBn
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
On
Output n
Fn
Flag n
Tn
Timer n
Cn
Counter n
Table 8-3
Input field: Format
Syntax
Meaning
H
Hexadecimal
D
Decimal
B
Binary
F
Floating point (only in conjunction with
double word)
After the variable to be displayed has been input in the field Operand using the
syntax described above, the current value of the variable is displayed in the
format you have set.
Use the soft key Change to switch over to the Control mode. Now you can use
the field Value to specifynew values for the displayed variables.
The entered value must be within the definition range of the set format.
PLC status
display
Input syntax:
– Operand
– Format
Monitoring
Controlling: Start
8 PLC Start-Up
