LG Electronics 120S user manual Communication Functions Data type

Chapter 8 Communication Functions

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

Device Name	Explanation	Read/Write	Bit/Byte/Word Assignment
P	Input/Output relay	Available	All
M	Auxiliary relay	Available	All
L	Link relay	Available	All
K	Keep relay	Available	All
C	Counter	Available	All(Current value when Word)
T	Timer	Available	All(Current value when Word)
D	Data Register	Available	Byte, Word
S	Step relay	Available	Byte, Word
F	Special relay	Read Only	All

•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
Byte	B(42H)	%PB000, %MB000, %LB000, %KB000, %CB000, %TB000, %FB000
Word	W(57H)		%PW000, %MW000, %LW000, %KW000, %CW000, %TW000,
			%FW000, %DW000, %SW000

Remark

1)Timer/Counter used in bit command means contact point values.(word command means current values.)

2)Data register and Step relay can uses only word or byte commands.

3)In byte type commands, address is doubled

For example, D1234 is addressed to ‘%D1234’ in word type, and is addressed to ‘%2468’ in byte type.

8-8