Siemens SINUMERIK 840D sl Operating Manual page 357

PLC operands
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 Turning
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
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
Alarms, error messages, and system alarms
10.4 Displaying PLC and NC variables
357