Omron SYSMAC CS1D-PD Series Operation Manual page 168

Duplex CPU Units
3-1-6 Duplex CPU Units with Different Unit Versions
Requirements for
Duplex CPU Units
When Duplex CPU
Unit Operation Is Not
Possible
128
Maximum cycle time = Normal cycle time + α
CS1D CPU Unit model
CS1D-CPU67HA
CS1D-CPU68HA
CS1D-CPU65H
CS1D-CPU67H
A is the time added when duplex Inner Boards are mounted. Refer to the
Inner Board Operation Manual for the value of A.
Unit versions are used to identify functional additions to CS1D CPU Units.
(Refer to information on unit versions at the front of this manual for details.)
Upward compatibility is provided for all functional additions to CS1D CPU
Units. Duplex CPU Unit operation is thus possible for CPU Units of different
unit versions as long as only the functions supported by both unit versions are
used.
Duplex CPU Unit operation is possible as long as the active CPU Unit does
not use any functions not supported by the standby CPU Unit.
When the Active CPU Unit
Is an Older Unit Version
Active
Standby
CPU Unit CPU Unit
Functions
Supported
not functions
supported
(not used)
Supported
Supported
functions functions
Duplex CPU Unit operation is not possible if the unit version of the active CPU
Unit is earlier than that of the standby CPU Unit and the Active CPU Unit uses
functions not supported by the Standby CPU Unit. If this happens, a Duplex
Verification Error will occur and operation will be in Simplex Mode.
Functions used by
active CPU Unit
A31708 will turn ON to indicate a CPU Unit Version Verification Error as the
cause of the Duplex Verification Error. This error will be detected at the follow-
ing times.
• When the system is started (i.e., when the power supply is turned ON)
• When operation is switched from Simplex Mode to Duplex Mode
α (Maximum time beyond normal cycle time)
520 ms
900 ms
190 ms + A
520 ms + A
Duplex CPU Unit operation
is possible as long as only
functions supported by
both CPU Units are used.
Duplex operation is
possible in this range.
When the Standby CPU Unit
Is an Older Unit Version
Active
Standby
CPU Unit CPU Unit
Supported
Functions
functions
not
supported
Supported
Supported
functions functions
Section 3-1
When the Standby CPU Unit
Is an Older Unit Version
Active
Standby
CPU Unit CPU Unit
Supported
Functions
functions not
(not used)
supported
Supported
Supported
functions functions
Duplex CPU Unit operation
is not possible because the
Active CPU Unit is using
functions not supported by
the Standby CPU Unit.
Functions used by
Standby CPU Unit