Plc And Nc Variables - Siemens SINUMERIK 840D sl Operating Manual

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13.4 PLC and NC variables

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13.4 PLC and NC variables
13.4.1 Displaying and editing PLC and NC variables
The "NC/PLC variables" window allows NC system variables and PLC variables to be
monitored and changed.
You receive the following list in which you can enter the desired NC/PLC variables in order to
display the actual values.
● Variable
● Comment
● Format
● Value
PLC variables
Inputs
Outputs
Bit memory
Times
256
1. Select the "Diagnosis" operating area.
2. Press the "Messages" softkey.
The "Messages" window appears.
Address for NC/PLC variable
Incorrect variables have a red background and are displayed with a # character in the
value column.
Any comment on the variable.
The columns can be displayed and hidden.
Specify the format in which the variable is to be displayed.
The format can be specified (e.g. floating point)
Displays the actual value of the NC/PLC variables
Input bit (Ex), input byte (EBx), input word (EWx), input double word (EDx)
Output bit (Ax), output byte (ABx), output word (AWx), output double word
(ADx)
Memory bit (Mx), memory byte (MBx), memory word (MWx), memory
double word (MDx)
Time (Tx)
Operating Manual, 03/2010, 6FC5398-6AP10-4BA0
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