5-9
5 I/O Memory
CP2E CPU Unit Software User’s Manual(W614)
5-4 H
o
ld
ing A
rea (H)
5
5-4
Holding Area (H)
The Holding Area is part of the internal memory of the CPU Unit. It is used in programming. Unlike the
input bits and output bits in the CIO Area, I/O to and from external devices is not refreshed for this area.
These words retain their content when the PLC is turned ON or the operating mode is switched
between PROGRAM mode and RUN or MONITOR mode.
The Holding Area is automatically retained in the built-in non-volatile RAM even if the power supply is
interrupted.
The Holding area contains 12
8
words with addresses ranging from H0 to H127.
The Holding Area words from H512 to H15
3
5 can be set for use with function blocks. These words can-
not be specified as instruction operands in the user program.
The Holding Area is used when you want to resume operation after a power interruption using the same
status as before the power interruption.
Overview
Notation
Range
Applications
H 2 0 . 0 2
Bit n
u
m
b
er: 02
W
ord n
u
m
b
er: 20
I/O memory area designator: H
Summary of Contents for SYSMAC CP Series
Page 3: ......
Page 32: ...1 Overview 1 4 CP2E CPU Unit Software User s Manual W614 ...
Page 44: ...3 CPU Unit Operation 3 8 CP2E CPU Unit Software User s Manual W614 ...
Page 116: ...6 I O Allocation 6 8 CP2E CPU Unit Software User s Manual W614 ...
Page 144: ...7 PLC Setup 7 28 CP2E CPU Unit Software User s Manual W614 ...
Page 170: ...10 Interrupts 10 14 CP2E CPU Unit Software User s Manual W614 ...
Page 200: ...11 High speed Counters 11 30 CP2E CPU Unit Software User s Manual W614 ...
Page 272: ...12 Pulse Outputs 12 72 CP2E CPU Unit Software User s Manual W614 ...
Page 278: ...13 PWM Outputs 13 6 CP2E CPU Unit Software User s Manual W614 ...
Page 460: ...18 Programming Device Operations 18 28 CP2E CPU Unit Software User s Manual W614 ...
Page 576: ...Revision 2 CP2E CPU Unit Software User s Manual W614 ...
Page 577: ......