Siemens SINUMERIK 840D sl Commissioning Manual page 312

Service and diagnostics
18.1 NC/PLC variables
Formats
B
H
D
+/-D
F
A
Notation for variables
● PLC variables
EB2
A1.2
DB2.DBW2
● NC variables
– NC system variables - notation
– User variables/GUDs - notation
– OPI - notation
Note
NC system variables and PLC variables
• System variables can be dependent on the channel. When the channel is switched over,
the values from the corresponding channel are displayed.
• For user variables (GUDs) it is not necessary to make a specification according to global
or channel-specific GUDs. The indices of GUD arrays are, just like NC variables in the
system variable syntax, 0-based; this means that the first element starts with the index 0.
• Using the tooltip, for NC system variables, you can display the OPI notation (with the
exception of GUDs).
306
Binary
Hexadecimal
Decimal without sign
Decimal with sign
Floating point (for double words)
ASCII character
$AA_IM[1]
GUD/MyVariable[1,3]
/CHANNEL/PARAMETER/R[u1,2]
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
SINUMERIK Operate (IM9)