ZEN V2 Units
31
Bits
Note: Output bit Q3 of Communications-type CPU Units cannot be output externally. It can be used as a work bit.
■ Compatible Combinations of CPU Units and Expansion I/O Units
The Expansion I/O Units that can be connected to V2 CPU Units are different from those that can be connected to V1 CPU Units and previous
CPU Units. Expansion I/O Units with AC Inputs cannot be connected to V2 CPU Units with DC Power Supplies. Expansion I/O Units cannot be
connected to Economy-type CPU Units.
■ Memory Cassette and CPU Unit Combinations
Be aware of the following restrictions when using a Memory Cassette containing a program that was stored from a CPU Unit with a different version
of system software.
Note: 1. The display functions (display clear: -CD@ and day/month display: DAT1) cannot be used and will be ignored.
2. Only the memory area ranges supported by the pre-V1 CPU Units can be used for Timers, Holding Timers, Counters, Weekly Timers, Calendar Timers, and
Displays (i.e., only half of each).
3. Only 6 inputs and 4 outputs can be used in the CPU Unit I/O bits. Any others will be ignored.
4. Twin timer operation for timers, multiple-day operation and pulse operation for weekly timers, the 8-digit counter, and 8-digit comparators cannot be used.
New Zealand and Australia cannot be set for Daylight Saving Time (DST).
Name CPU Unit
V2 Units V1 Units Pre-V1 Units
10 I/O points 20 I/O points 10 I/O points 20 I/O points 10 I/O points
Input bits I 6 points 12 points 6 points 12 points 6 points
Output bits Q 4 points (See note.) 8 points 4 points 8 points 4 points
Timers T 16 points 8 points
Holding timers # 8 points 4 points
Counters C 16 points 8 points
Weekly timers @ 16 points 8 points
Calendar timers * 16 points 8 points
Display bits D 16 points 8 points
Work bits M 16 points
Holding bits H 16 points
Expansion input bits X 12 points
Expansion output bits Y 12 points
Analog comparator bits A 4 points
Timer/counter comparator bits P 16 points
8-digit counter F 1 point ---
8-digit counter comparator bits G 4 points ---
CPU Units Supported
Expansion I/O Units
Version CPU Unit type Power supply Model
V2 Standard LCD type
LED type
Communications type
AC ZEN-@C1AR-A-V2
ZEN-@C2AR-A-V2
ZEN-10C4AR-A-V2
ZEN-8E1AR
ZEN-8E1DR
ZEN-8E1DT
Standard LCD type
LED type
DC ZEN-@C1D@-D-V2
ZEN-@C2D@-D-V2
ZEN-8E1DR
ZEN-8E1DT
Economy type AC ZEN-@C3AR-A-V2 Not supported.
DC ZEN-@C3DR-D-V2
V1 and Pre-V1 Standard LCD type
LED type
AC ZEN-@C1AR-A-V1
ZEN-@C1AR-A
ZEN-@C2AR-A-V1
ZEN-@C2AR-A
ZEN-4EA
ZEN-4ED
ZEN-4ER
ZEN-8EAR
ZEN-8EDR
ZEN-8EDT
DC ZEN-@C1D@-D-V1
ZEN-@C1D@-D
ZEN-@C2D@-D-V1
ZEN-@C2D@-D
System software version
of CPU Unit used to write
the Memory Cassette
System software version of CPU Unit used to read the Memory Cassette
Ver. 1.0 Ver. 1.1 Ver. 2.0 (V1 CPU Units) Ver. 3.0 (V2 CPU Units)
10 I/O points 20 I/O points 10 I/O points 20 I/O points
Ver. 1.0 OK OK OKOKOKOK
Ver. 1.1 Restrictions (See note
1.)
OK OK OK OK OK
Ver. 2.0
(V1 CPU
Units)
10 I/O points Restrictions
(See notes 1 and 2.)
Restrictions
(See note 2.)
OK OK OK OK
20 I/O points Restrictions
(See notes 1, 2, and 3.)
Restrictions
(See notes 2 and 3.)
Restrictions
(See note 3.)
OK Restrictions
(See note 3.)
OK
Ver. 3.0
(V2 CPU
Units)
10 I/O points Restrictions
(See notes 1, 2, and 4.)
Restrictions
(See notes 2 and 4.)
Restrictions
(See note 4.)
Restrictions
(See note 4.)
OK OK
20 I/O points Restrictions
(See notes 1 to 4.)
Restrictions
(See notes 2, 3, and 4.)
Restrictions
(See note 4.)
Restrictions
(See note 4.)
Restrictions
(See note 3.)
OK
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