Details Of Hot Start, Cold Start And Stop State - Omron SYSMAC CS Series Operation Manual

Description of Operation
Conditions
RAM Flash
memory
Normal Error
Error Error
(Including
data loss)
3-2-3

Details of Hot Start, Cold Start and Stop State

1,2,3...
100
A42410 A42411 System
Common
(RAM (Inner
Block
Error Board
ITEM018
Flag) Fatal
(START
Error
mode at
Flag)
Power ON)
OFF OFF 1 or 2 (Set-
ting is irrele-
vant.)
ON ON 1 or 2 (Set-
ting is irrele-
vant.)
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. 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.
Start method Transfer processing
System Common After transferring (backing
Block ITEM101 up) RAM data to flash
(Backup start memory, transfers (recov-
specification) set ers) flash memory data to
to 1: RAM and transfers the
reception data and
Performs a cold
send/receive data for the
start automatically
HMI to RAM.
after retrying the
backup automati-
cally.
System Common ---
Block ITEM101
(Backup start
specification) set
to 0:
Operation stops.
Operation stops. None
Note: The following steps
are required to restore
operation:
Download data to the Loop
Controller (LCB level).
Specify a cold start.
Section 3-2
A35807
(Automatic
Cold Start
Execution
Flag)
ON
(OFF when
operation
stops)
---
ON