Omron SYSMAC CS Series User Manual

100
Description of Operation Section 3-2
3-2-3 Details of Hot Start, Cold Start and Stop State
There are two ways that the Loop Controller can start operation: either a hot
start or a cold start. With the default settings, the Loop Controller will perform
a hot start when the power is turned ON or the Loop Controller is restarted.
If there is an error in the RAM data due to a discharged backup capacitor or
other cause, the Loop Controller will recover the backup data from flash mem-
ory and perform a cold start.
■ Cold start
Use the cold start method when it isn't necessary to continue operation with
the same values that existed before the power was turned OFF and it is
acceptable for the Board to start operation with the following settings: Local
Set Point, MV = 0, and Manual mode.
1,2,3... 1. The Board reads the Function block data from flash memory and writes the
data to RAM.
2. The Board reads the reception data (SP, PID, etc.) and the Control/Opera-
tion Blocks' HMI send/receive data from the CPU Unit's HMI data area (in
the EM area) and writes the data to RAM.
3. The Board starts to run after initializing the memory area used for opera-
tions as well as the MV output, Auto/Manual switch, and Remote/Local
switch settings.
Normal Error OFF OFF 1 or 2 (Set-
ting is irrele-
vant.)
System Common
Block ITEM101
(Backup start
specification) set
to 1:
Performs a cold
start automatically
after retrying the
backup automati-
cally.
After transferring (backing
up) RAM data to flash
memory, transfers (recov-
ers) flash memory data to
RAM and transfers the
reception data and
send/receive data for the
HMI to RAM.
ON
(OFF when
operation
stops)
System Common
Block ITEM101
(Backup start
specification) set
to 0:
Operation stops.
--- ---
Error
(Including
data loss)
Error ON ON 1 or 2 (Set-
ting is irrele-
vant.)
Operation stops. None
Note: The following steps
are required to restore
operation:
Download data to the Loop
Controller (LCB level).
Specify a cold start.
ON
Conditions A42410
(RAM
Error
Flag)
A42411
(Inner
Board
Fatal
Error
Flag)
System
Common
Block
ITEM018
(START
mode at
Power ON)
Start method Transfer processing A35807
(Automatic
Cold Start
Execution
Flag)
RAM Flash
memory

Omron SYSMAC CS Series Specifications

General

Brand	Omron
Model	SYSMAC CS Series
Category	Controller
Language	English