Configuring Hardware and Communication Connections STEP 7.pdf

Downloading
Procedure
1. In HW Config, select the PLC > Download to Module menu command.
2. In the "Download to Module" dialog box that is then displayed, select the
"Download station configuration in RUN mode" option.
Note: With the "Download in STOP mode" option, select the "not automated"
variant of the download procedure.
3. Confirm the selection with "OK".
The "Download to H-Station" dialog box is now displayed.
4. If both CPUs in the H-station can be reached online, then select one of the
CPUs shown that is to receive the download of the new configuration (system
data blocks). By default, the reserve CPU is preselected to receive the
download. The prompt to select a CPU is also displayed in the "Next Action"
field.
If only one of the two CPUs can be reached online, then this CPU is
automatically selected to receive the download. This default selection cannot
be changed.
5. If you want the actions to be switched over from one CPU to the other without
interruption, then you should select the "Automatic switchover" check box.
6. Click the "Next" button.
During the download, each action that has been started is displayed in the
"Next Action" field.
All completed actions are identified in the "Status" field by a checkmark.
7. Regardless of whether the "Automatic switchover" check box is selected or not,
you will have to manually confirm the "Switch to CPU with changed HW
configuration" action by clicking "Next".
After this, the CPU with the changed HW configuration automatically goes into
RUN mode and the other CPU into STOP mode. After the HW configuration on
both CPUs has been brought up to the same, updated version, the system
then automatically goes into redundant mode.
14.7 Downloading the Global Data Configuration
During the compiler run, the data in the global data table are converted into system
data. If no errors are displayed during compiling, you can transfer the system data
to the CPUs:
• Select the menu command PLC > Download.
Maximum Number of GD Circles
The number of GD circles is limited to 16. CPUs that have a GD circle number
greater than 16 cannot be loaded with the global data configuration.
Configuring Hardware and Communication Connections with STEP 7
14-10 A5E00706939-01