Plc And Nc Variables; Displaying And Editing Plc And Nc Variables - Siemens SINUMERIK 840D sl Universal Operating Manual

Alarm, error, and system messages

17.6 PLC and NC variables

17.6 PLC and NC variables
17.6.1

Displaying and editing PLC and NC variables

Changes can only be made to the NC/PLC variables with the appropriate password.
Incorrect parameterization
Changes in the states of NC/PLC variables have a considerable influence on the machine.
Incorrect configuration of the parameters can endanger life and cause damage to the machine.
In the "NC/PLC Variables" window, enter the NC system variables and PLC variables that you want
to monitor or change in the list:
• Variable
Address for NC/PLC variable.
Incorrect variables have a red background and are displayed with a # character in the value
column.
• Comment
Any comment on the variable.
The columns can be displayed and hidden.
• Format
Specify the format in which the variable is to be displayed.
The format can be specified (e.g. floating point).
• Value
Displays the actual value of the NC/PLC variables.
PLC variables
Inputs
Outputs
Bit memory
Times
Counters
Data
418
WARNING
• Input bit (Ex), input byte (EBx), input word (EWx), input double word (EDx)
• Input bit (Ix), input byte (IBx), input word (IWx), input double word (IDx)
• Output bit (Ax), output byte (ABx), output word (AWx), output double
word (ADx)
• Output bit (Qx), output byte (QBx), output word (QWx), output double
word (QDx)
Memory bit (Mx), memory byte (MBx), memory word (MWx), memory double
word (MDx)
Time (Tx)
• Counter (Cx)
• Counter (Cx)
• Data block (DBx): Data bit (DBXx), data byte (DBBx), data word (DBWx),
data double word (DBDx)
• Data block (VBx): Data bit (VBXx), data byte (VBBx), data word (VBWx),
data double word (VBDx)
Operating Manual, 07/2021, 6FC5398-6AP40-6BA4
Universal