dl-breadcrumbs__homedl-breadcrumb-item__separatorGetting started with example projectsdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorExample project for central I/O expansiondl-breadcrumb-item__separatorReset of the PLC
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Reset of the values and parameters

In some cases, it could be required to do a reset, e.g., for resetting of counter values, parameters etc.

Fig. 6: Reset commands in “Online” menu
01.09.01

Reset warm

All variables are reset, except RETAIN PERSISTENT variables.

Reset cold

Causes initialization of all variables, except PERSISTENT variables. By recommended creation of remanent variables always with both properties: PERSISITENT and RETAIN, this command resets all variables, except PERSISTENT RETAIN variables.

Reset origin

All variables and the application project are reset.

Table 4: Behavior of variables of type VAR (local or global) and variables of type PERSISTENT RETAIN

VAR

VAR PERSISTENT RETAIN

After online command 'Online change'

no change

no change

After online command 'Download'

initialization

no change

After online command 'Reset warm'

initialization

no change

After online command 'Reset cold'

initialization

no change

After online command 'Reset origin'

initialization

initialization

After power supply off

initialization

no change

Complete reset of the PLC

To do a complete reset of the PLC thereby erasing the application from the RAM and flash EEPROM do the following.

  1. 01.09.03

    Right-click the station object “PLC_AC500_V3” in the device tree.

  2. Select “Reset origin device [station name]”.

    The application is completely erased from the PLC (complete project from all memory areas).