Omron ZEN Quick Guide

5 I/O Addressing ZEN Programmable Logic Module
OMRON ELECTRONICS, S.A. Page 15
Timers and Counters
Area name Symbol Bit
addresses
N° bits Function Ladder Program
Timer T T0 to T7 8 Can be activated between ON-delay,
OFF-delay, one-shot and flashing
pulse operation.
Holding
timer
# #0 to #3 4 Maintains the timer value when the
trigger input is in OFF mode. The
timer will continue even if turned to
ON mode again.
Clock
timer
@ @0 to @7 8 Can be put into ON or OFF mode on
a specified day or period.
Calendar
timer
* *0 to *7 8 Can be put into ON or OFF mode on
a specified date.
Counter C C0 to C7 8 Reversible counter
N.O. / N. C condition
(see note 1)
Note Timers can have the following functions.
X ON delay Time elapsed from the moment the input is triggered until the set timer bit
turns to ON mode.
n OFF delay The timer bit turns to ON mode from the moment the input is triggered
until the set time has elapsed on the timer.
O One-shot The set timer bit turns the selected time to ON mode when the trigger
input switches from OFF to ON mode.
F Flashing pulse The set timer bit constantly switches from OFF to ON mode while the
trigger input remains in ON mode
Display Bits
Area
name
Symbol Bit
addresses
N° bits Function Ladder Program
Display D D0 to D7 8 Displays predefined messages relating to
timers, counters and their present values or
converted analog values.
Output
I/O Bit Addressing
The bit input addresses 10 to 15 and the bit output addresses Q0 to Q3 are
always allocated to the CPU unit.
Up to 3 I/O expansion units can be added, allocating these I/O points to the X0
to Xb input bits and Y0 to Yb as output bits, remembering the order of the
connected expansion units.

Omron ZEN Specifications

General

Display	LCD
Mounting Type	DIN Rail
Operating Temperature	-10 to 55°C
Power Supply Voltage	100-240V AC
Output Type	Relay, Transistor
Number of Outputs	4-8
Programming Language	Ladder Logic