Omron CS1W-LC001 Operation Manual page 103

Description of Operation
Selecting the START mode at power ON
(2) The defaults of the System Common block on the Loop Control Unit must
be set correctly. In particular, make sure that the Data Memory (D) for the
Node Terminals on the CPU Unit used by the Loop Control Unit is not set
in duplicate for other applications on the PC. If the application of the Data
Memory is set in duplicate, the PC system may act unexpectedly and
cause injury.
(3) When writing data to the I/O memory in the CPU Unit with function blocks
(e.g., using Send All Blocks, Expanded DO/AO Terminal to CPU Unit, or
DO/AO Terminal to CPU Unit), be sure that the words written to in the I/O
memory are not being used for any other purpose. If I/O memory words
are allocated to more than one purpose, the PC system may act
unexpectedly and cause injury.
If DIP switch pin 2 is OFF (no flash memory transfer at startup), set either a
cold start or hot start at ITEM018 (START mode at power ON) of the System
Common block (Block Model 000) when the power of the Loop Control Unit is
turned ON (PC power is turned ON) or the Loop Control Unit is restarted
(CPU Bus Unit Restart flag state changes from OFF to ON). CX-Process Tool
is used to set this.
If DIP switch pin 2 is ON (flash memory transfer at startup), the setting of
ITEM 018 will be ignored and a cold startup will be used automatically.
ITEM018 Description
1 HOT start (default)
2 COLD start
If DIP switch pin 2 is OFF, the default for the Loop Control Unit is a hot start
when the power to the PC Unit is turned ON or the Loop Control Unit is
restarted.
When a hot start is performed, operations are started with all ITEMs and
function block values stored internally for operations held at the states that
were active before the stop occurred.
The RUN LED on the front panel also lights at a hot start.
Loop Control Unit
Start of
Power ON
operation
(hot start)
(example)
External I/O
(Field Terminal)
block for analog
I/O, etc.
Operation block
for square root,
etc.
Control block for
PID, etc.
Section 3-2
85