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6-1
PC Operation
This section details basic CPU operation of CVM1D PCs.
6-1-1 Initialization
The following diagram shows initialization in a duplex CVM1D PC on power-up:
Power application
Transfer from
Memory Card to
Program Memory.
(Turns OFF all bits in I/O memory except those
in the Holding Area, unless the IOM Hold Bit and
PC Setup are set to retain I/O memory.)
Self diagnosis:
S
Hardware check
S
Memory check
Verify duplex status
(Verify active CPU
status.)
Automatic program
transfer at start-up?
Clear I/O memory.
End initialization.
Active (ACT) CPU Unit
Power application
Self diagnosis:
S
Hardware check
S
Memory check
Verify duplex status
(Verify standby CPU
status.)
Automatic program
transfer at start-up?
Clear I/O memory.
End initialization.
Standby (STB) CPU Unit
Transfer from
Memory Card to
Program Memory.
(Set automatic transfer at startup with
the DIP switch or the PC Setup.)
PC Operation
Section 6-1
Summary of Contents for CVM1D
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