Start of the User Program¶
The user program (UP) is started according to the following table. It is assumed that a valid user program is stored to the Flash memory.
See Storage Devices: Storage Device Details
| Action | No SD memory card with UP installed Auto run = ON |
No SD memory card with UP installed Auto run = OFF |
SD memory card with UP installed Auto run = ON |
SD memory card with UP installed Auto run = OFF |
|---|---|---|---|---|
Voltage ON or Warm start or Cold start |
UP is loaded from Flash into RAM and started from Flash. | No UP is loaded from Flash. When logging in, the message “No program available in the controller …” is displayed. | UP is loaded from the SD memory card into Flash memory and RAM and then started from RAM. | UP is loaded from the SD memory card to the Flash memory. RAM remains empty. When logging in, the message “No program available in the controller …” is displayed. |
| STOP -> RUN | UP in RAM is started. | UP in RAM is started. | UP in RAM is started. | UP in RAM is started. |
| STOP -> START | UP in RAM is started. | UP in RAM is started. | UP in RAM is started. | UP in RAM is started. |
| Download *1) | The UP currently stored in the CPU’s RAM is stopped. The built UP is loaded from the PC into the PLC’s RAM. | The built UP is loaded from the PC into the PLC’s RAM. | The UP currently stored in the CPU’s RAM is stopped. The built UP is loaded from the PC into the PLC’s RAM. | The built UP is loaded from the PC into the PLC’s RAM. |
| Online Change *2) | Processing of the UP currently stored in the CPU’s RAM is continued. The changes made to the UP are loaded from the PC into the PLC’s RAM. The UP is reorganized and processed. | The changes made to the UP are loaded from the PC into the PLC’s RAM. The UP is reorganized. | Processing of the UP currently stored in the CPU’s RAM is continued. The changes made to the UP are loaded from the PC into the PLC’s RAM. The UP is reorganized and processed. | The changes made to the UP are loaded from the PC into the PLC’s RAM. The UP is reorganized. |
Remarks:
*1): After the download is completed, the program is not automatically stored to the Flash memory. To perform this, create a boot project boot: Generating Boot ApplicationsAutomation_Builder.
*2): After the online change process is completed, the program is not automatically stored to the Flash memory. For this, after reorganization is completed create a boot project boot: Generating Boot Applications