Omron CP1E CPU UNIT SOFTWARE User Manual page 51

Addresses are allocated to symbols using one of the following methods.
• User Specified allocation
• Automatic allocation using the CX-Programmer
The area of memory used for automatic allocations is set by selecting Memory Allocation - Auto-
matic Address Allocation from the PLC Menu in the CX-Programmer.
Types of sym-
bols
Global
symbols
Local
symbols
Note "Global" and "local" indicate only the applicable scope of the symbol.
They have nothing to do with the applicable scope of memory addresses.
Therefore, a warning but not an error will occur in the following cases, and it will be possible to
transfer the user program.
• The same addresses is used for two different local symbols.
• The same addresses is used for a global symbol and a local symbol.
Additional Information
In programs in the CX-Programmer, global symbols and local symbols can be identified by the
following character colors and symbol icons.
Classification
Global symbols
Local symbols
Select Tools - Options, and select Local Symbols or Global Symbols in Appearance to change
the color.
CP1E CPU Unit Software User's Manual(W480)
Project tree in the
CX-Programmer
PLC tree
Program tree
Black (default)
Blue (default)
4 Understanding Programming
Scope
Access
Access
using sym-
from other
bols from a
tasks
network
Not Possible.
possible.
Not
possible.
Display color
Address and I/O
comment (with-
Access
out a symbol
from the
name)
local task
Possible. Supported
Possible. Not supported
Example (default color)
Start
3.00
Error
W0.00
4
4-7