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Description of Operation
Section
3-2
84
3-2 Description of Operation
3-2-1
When Turning the Power ON to the PC
Default state
Function block data is not stored to the Loop Control Unit when it is shipped
from the factory. CX-Process Tool must be used to prepare function blocks
and download them to RAM in the Loop Control Unit.
State after function block data is downloaded, and how to start running after the
download
After the function block data is downloaded to RAM or transferred between
RAM and flash memory, the Loop Control Unit will be in a stop state. Perform
either of the steps (1) or (2) to start the Loop Control Unit.
ntlp
(1) Use CX-Process Tool to indicate either a hot start or a cold state.
([Execution]-[Run]-[Run/stop command])
Note
By a hot start, operation is started continued at the state that was active
before the stop occurred. By a cold start, operation is started after all internal
operation memory is initialized. (PID is reset to the Manual mode.)
For details on hot start and cold start, see 3-2-2 Details of Hot Start, Cold
Start and Stop State.
(2) Turn the power to the PC OFF then back ON again.
WARNING
Check the following items before starting to run the Loop Control Unit:
(1) Analog Input/Output Units used in combination with the Loop Control Unit
must be mounted correctly, and the unit number set on the front panel of
the Analog Input/Output Unit must match the unit number set on the Field
Terminal block. If the unit numbers do not match, input/output (read/write)
is performed on the data of another Special I/O Unit (whose unit number
is set on the Field Terminal block).