Chapter 4 PLC Features
4.1 Device Memory
4-8 ME0416-1A
4.1.11 OM_C [For Counter]
OM_C is a count measuring memory and there are 64 points of counter available in total from C0
toC63. Counter setting can be established in the range from 1 to 32767.
Contact status can be confirmed in CS, coil status in CC, current value in CV and setting value in
C P.
4.1.12
OM_L [For Indication of Destination to Jump for JE, JMP, CALL Commands]
It is the memories used to indicate the destination to jump in JE, JMP and CALL Commands. They
do not have data. If L255 is indicated, it jumps to END Command. (L255 is not available in CALL
Command.)
L0 indicates the initialization-dedicated routine, and if it is described in a ladder program, the first
one scan executes only the routine indicated in L0.
4.1.13 OM Modbus Address
RCON-LC permits access to OM using Modbus.
The ranges of the register address and the coil address for each OM are as shown below. For the
details of each address, refer to the address table for RCON-LC_Modbus.
OM_ Modbus Address
OM Name
Register Address Range
(Hexadecimal)
Coil Address Range
(Hexadecimal)
Read/Write Type
For bit memories, coil addresses are set so access can be made bit by bit. Y, M, LM, AM and D
are capable for writing. Other OM are capable only for reading. As L does not have a value, Modes
address assignment is not capable.
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