Chapter 5 Operation Flow 27
Chapter 5 Operation Flow
5.1 After Power Supply Connection
(1) ROM->RAM transmission
◎ Power ON, the embedded EPPROM program and setting parameters
will be transmitted to RAM.
(2) Data memory initialization
◎ Power on, all the data in memory will be reset initialized. Under RUN
mode, when M KEEP parameter is set to ON, the parameters will be
memorized as the ones before power off. That is, the data before counter
power off will memorized as non-volatile mode is selected. While under
STOP mode, M and counter data before power off will not be memorized.
When executing the scan for the first time, the input Relay will refresh
the data according to input ON/OFF, while the output relay will refresh
the data according to operation after executing user program.
（3）Scan Time
◎ The scan time covers the time for processing input and output data, the
process time the operator applied until the final result is obtained.
The scan time is related to the capacity of the Instruction. Under Ladder
mode: 5~20mS; Under FBD: 2~10mS
◎ The scan time is related to the user’s program capacity. The scan time range is
5~20ms under Ladder edit mode while 2~10ms under FBD mode.
(4) Overall Response Time for SG2 （not including expansion module）
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