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

9.2

Displaying PLC and NC variables

The "PLC/NC Status" window supports the observation and modification of PLC memory
locations and NC system variables.
You can also modify PLC memory locations.
You receive information in the list on operands, with their format and status value.
PLC operands
Inputs
Outputs
Bit memory
Times
Meters
Data
Formats
B
H
D
G
C
Examples
EB2
MW20
DB2.DBB180
$AA_IM[1]
Changing PLC operands
Changes can only be made to the PLC operands with the appropriate password.
Changes in the states of PLC memory locations have a major impact on the machine.
Incorrect configuration of the parameters can endanger human life and cause damage to
the machine.
HMI sl Universal
Operating Manual, 01/2008, 6FC5398-6AP10-2BA0
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)
Counter (Cx)
Data block (DBx), data bit (DBXx), data byte (DBBx), data word (DBWx),
data double word (DBDx)
Binary
hex
dec
Floating comma (for double words)
Character (ASCII character)
DANGER
Alarm, error, and system messages
9.2 Displaying PLC and NC variables
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