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Programmable Relay: ZEN Compatible Memory Cassettes

FAQ No. FAQ04294

Primary Contents

Question

ZEN Programmable Relays: What Memory Cassettes are compatible with what CPU Unit versions?

Answer

Memory Cassette Compatibility with CPU Unit Versions

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 the system software.

Version of CPU Unit
used to write the
Memory Cassette
Version of CPU Unit used to read the Memory Cassette
Ver. 1.0Ver. 1.1Ver. 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. 1.0OKOKOKOKOKOK
Ver. 1.1Restrictions
*1
OKOKOKOKOK
Ver. 2.0
(V1 CPU Units)
10 I/O pointsRestrictions
*1 *2
Restrictions
*2
OKOKOKOK
20 I/O pointsRestrictions
*1 *2 *3
Restrictions
*2 *3
Restrictions
*3
OKRestrictions
*3
OK
Ver. 3.0
(V2 CPU Units)
10 I/O pointsRestrictions
*1 *2 *4
Restrictions
*2 *4
Restrictions
*4
Restrictions
*4
OKOK
20 I/O pointsRestrictions
*1 *4
Restrictions
*2 *3 *4
Restrictions
*4
Restrictions
*4
Restrictions
*3
OK

*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, operation between days 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).