IAI RCON-LC, Instruction Manual

Page: 88 / 116

Chapter 4 PLC Features
4.1 Device Memory
4-2
ME0416-1A
4.1 Device Memory
In RCON-LC, the device memories are called MO. MO should be classified to three types, bit
memories, word memories and pointers. A bit memory has data volume of 1 bit while a word
memory has that of 16 bits (2 bytes). A pointer does not have data. The number available for use
in each MO and RCON-LC as well as the number available for use in existing models are as
shown below.
Detail of OM and Numbers Available for Use in each Feature
OM Name OM Type Purpose
Memory Quantity
(Decimal)
X
Bit Memory
Data Volume: 1 Bit
For Input Assignment 128
Y For Output Assignment 128
M For General 3072
LM For Retention 256
AM
For Axis Control Command
Assignment
4096
SM For System 128
TS Timer Contact Status 64
TC Timer Output Status 64
CS Counter Contact Status 64
CC Counter Output Status 64
IX
Word Memory
Data Volume: 16 Bit
For Index 2
D For General 128
SD For System 64
TV Timer Current Value 64
TP Timer Setting Value 64
CV Counter Current Value 64
CP Counter Setting Value 64
L
Pointer
Data Volume: None
For Indication of Destination to
Jump for JE, JMP, CALL
Commands
256
For details regarding the device memory and how to describe, refer to LC Programming Manual
(ME0329) and Ladder Edit Software Manual (ME0330).