Chapter8 Communication Function
8-8
8.1.5 Data type
It’ s possible to read and write device in built-in communication. When device is used, be aware of data type.
1) Data type of variable
• Available types of device : P,M,L,K,C,T,D,S,F
• When variable is used, attach ‘ %’ (25H) in front of the marking characters.
Data type Marking characters Examples
Bit X(58H) %PX000, %MX000, %LX000, %KX000, %CX000, %TX000, %FX000
Word W(57H)
% PW000, % MW000, %LW000, %KW000, %CW000, %TW000,
%FW000, %DW000, %SW000
Device Name Explanation Read/Write Bit/Word Assignment
P Input/Output relay Available Both
M Auxiliary relay Available Both
L Link relay Available Both
K Keep relay Available Both
C Counter Available Both
T Timer Available Both
D Data Register Available Word Only
S Step relay Available Word Only
F Special relay Read Only Both
Remark
1) Timer/Counter used in word command means current values.
2) Data register and Step relay can uses only word commands.
3) When Link module is used, Link relay must not written.(it cause communication error)
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