Omron SYSMAC C20K Operation Manual page 147

Special Instructions
5-19-3 NOTATION INSERT – NETW(63)
Description
Flags
136
Ladder Symbol
NETW(63)
C1
C2
NETW(63) is not executed regardless of its execution condition. It is provided
so that the programmer can leave comments in the program. The operands
may be any hexadecimal value from 0000 through FFFF.
There are no flags affected by this instruction.
Section 5-19
Operand Data Areas
C1 : Comment 1 (Hex)
#
C2 : Comment 2 (Hex)
#