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Chapter 2. Functions
2-12
2.3.10 Special relay : F
The F area is read- only relay and user can not change the value of F area. See the F relay table
at the appendix for details.
2.3.11 Special M / L relay : M / L
Some M or L relays are reserved for special usage. See the list of special relays at the appendix
and be careful when use those M or L area in the program.
2.3.12 Special data register : D
Some data registers are reserved for special usage. These registers are various according to
the type of CPU. See the list of special registers at the appendix and be careful when use those
data register in the program.