User`s manual

CHAPTER 4: SPECIAL OPERATIONS

After pressing the Function Key (SOI-260) or Mode Key (SOI-120),

one of the menu item selections is called SPECIAL. This selection

provides access to two functions: the Point-Access/Display (P-A/D)

function and the PLC Start/Stop function.

CAUTION: The Point-Access/Display function is a

powerful tool. Its access should be restricted solely to

authorized personnel. When using this function, it is

possible to change PLC data that may alter critical

process control operations.

The P-A/D function gives you access to all unrestricted S5 PLC oper-

ands. With this access, operands may be displayed and modified. This

feature of the SOI is extremely useful in start-up or debugging sessions

of SOI programs or regular PLC operations.

The Start/Stop function gives you the ability to start or stop the PLC

from the SOI.

Assuming that it exists in the program file, the first screen to be dis-

played is the Special Security Screen. You must then enter any one of

the three programmed security codes to continue to the S5 Special

Operations menu screen.

Note If the Special Security Screen is not programmed, the first screen

displayed is the S5 Special Operations menu screen.