Omron ZEN Operation Manual page 88

Creating Ladder Programs
64
■
Memory Areas
Symbol
I CPU Unit input bits
Q CPU Unit output bits
X Expansion I/O Unit input
bits
Y Expansion I/O Unit output
bits
M Work bits
H Holding bits
B Button switches
Note
■
Timers, Counters, and Analog Comparators
Symbol
T Timers
# Holding timers
@ Weekly timers
*
Calendar timers
C Counters
F 8-Digit counter
A Analog comparators
P Comparators
G 8-Digit comparators
Note
Name
I0 to I5 (6 points) (See note 1.)
Q0 to Q3 (4 points) (See note 2.)
X0 to Xb (12 points) (See note 3.)
Y0 to Yb (12 points) (See note 3.)
M0 to Mf (16 points)
H0 to Hf (16 points)
B0 to B7 (8 points) (See note 4.)
1. I0 to Ib (12 points) for CPU Units with 20
I/O points.
2. Q0 to Q7 (8 points) for CPU Units with 20
I/O points. Q3 of CPU Units with
communications cannot be output
externally.
3. Can be used only when Expansion I/O
Units are connected.
4. Cannot be used for LED-type CPU Units.
Name
1. Can be used only when LCD-type CPU
Units are used.
2. Can be used only with CPU Units with
DC power supply (PNP connection).
Section 3-3
Bit type and number
Bit type and number
T0 to Tf (16 timers)
#0 to #7 (8 timers)
@0 to @f (16 timers) (See note
1.)
*0 to *f (16 timers) (See note
1.)
C0 to Cf (16 counters)
F0 (1 counter)
A0 to A3 (4 comparators)
(See note 2.)
P0 to Pf (16 comparators)
G0 to G3 (4 comparators)