Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 161

Duplex CPU Units
CS1D Error
Classifications
(Reference)
times are longer than for the CS1-H. (For details on processing time, refer
to 9-5 Instruction Execution Times and Number of Steps.
Synchronized instructions:
IORF(097) (I/O REFRESH), DLINK(226) (CPU BUS UNIT I/O
REFRESH), IORD(222) (INTELLIGENT I/O READ), IOWR(223) (INTEL-
LIGENT I/O WRITE), PID(190) (PID), RXD(235) (RECEIVE),
FREAD(700) (READ DATA FILE), and FWRIT(701) (WRITE DATA FILE)
• If the active and standby CPU Units cannot be synchronized when any of
the above instructions are executed (except for PID), the ER Flag will turn
ON. If that occurs, execute the instruction again.
• Also refer to the precautions in Appendix E Precautions in Replacing
CS1-H PLCs with CS1D PLCs.
The underlined errors are related to duplex operation.
Error status
Operation switching errors
• CPU error
• Memory error
• Fatal Inner Board error
• Program error
• Cycle time overrun error
• FALS error
Fatal errors
• I/O bus error
• Duplication error
• Too many I/O points error
• I/O setting error
Non-fatal Errors causing a
errors switch to Simplex
Mode (duplex errors)
• Duplex verification
error (See note 1.)
• Duplex bus error
(See note 1.)
Non-fatal errors in
Duplex Mode
• Duplex power supply
error
• Duplex communica-
tions error
• FAL error
• PLC Setup error
• I/O verification error
• Non-fatal Inner
Board error
• CPU Bus Unit error
• Special I/O Unit
error
• Battery error
• CPU Bus Unit set-
ting error
• Special I/O Unit set-
ting error
CPU standby (See notes 1 and 2.)
Expansion Rack power interruption
Operation status
Duplex Mode Simplex Mode or
Operation continues in Operation stopped.
Simplex Mode.
(The status is
switched from standby
to active.)
Operation stopped. Operation stopped.
Operation continues in Operation continues in
Simplex Mode. Simplex Mode.
(Standby or active sta-
Note Duplex verifi-
tus remains
unchanged.)
Operation continues in
Duplex Mode.
Waits for operation. Waits for operation.
Section 3-1
Simplex System
cation errors
and duplex bus
errors do not
occur in Sim-
plex Mode.
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