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PLC System Start-Up and Program Test
There are two ways of deleting the internal program memory:
•
Offline via the switch for "Default/Overall Reset"
•
Online with the "Delete" programmer function.
Overall Reset via the Switch for "Default/Overall Reset" on the Control Panel of the CPU
Switch on the power supply module
Set the CPU mode selector to STOP (ST)
Set the switch for "Default/Overall Reset" to the "OR" position and hold it in this position (if
the switch is not held in position it will automatically spring back to the "RE" position).
While you hold down the switch for "Default/Overall Reset" in the "OR" position:
Switch the CPU mode selector twice from "ST" to "RN".
The STOP LED will momentarily go off.
Release the switch for "Default/Overall Reset".
The switch automatically springs back to the "RE" position.
The internal program memory and any RAM submodule (plugged into the CPU 941/CPU 942) are
now "overall reset". After Overall Reset, the CPU automatically tests your internal program
memory; in the event of a fault, the STOP LED flickers.
Overall Reset with the "Delete" Programmer Function
Link the programmer and the CPU over a suitable connection cable
Switch on the PLC power supply module
Set the CPU mode selector to "ST"
or set the CPU to the STOP state using the "STOP" programmer function.
Call the "Delete" auxiliary function on the programmer
Complete the input fields
in the case of "CRT-based PGs":DELETE FROM SOURCE: PLC
Press the Enter key
The question "Delete?" appears on the screen
Press the Enter key
The internal program memory and any RAM submodule (plugged into the CPU 941/CPU 942) are
now "overall reset". After Overall Reset, the CPU automatically tests your internal program
memory; in the event of a fault, the STOP LED flickers.
4-2
S5-115U Manual
BLOCK:B (B=all blocks)
EWA 4NEB 811 6130-02b
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