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13 - 2 
MELSEC-A
13   COMMON FUNCTIONS 
 
13.1 Outline of common functions 
"Common functions" are executed according to the user's requirements, regardless of 
the control method, etc. 
Common functions include "parameter initialization", "execution data backup", "work 
status and error code display", etc. These common functions are executed by 
commands from the AD75 software package, common function sequence programs, 
mode switches on the front panel of the main unit, etc.   
The following table shows the functions included in the "common functions". 
 
Common function 
Details 
Parameter initialization 
function 
This function returns the "setting data" stored in the D75P2 flash 
ROM to the factory-set initial value. 
There are two methods for this function.   
    1) Method using the AD75 software package   
    2) Method using the sequence program 
Execution data backup 
function 
This function stores (backs up) the "setting data", currently being 
executed, in the flash ROM. 
There are two methods for this function. 
    1) Method using the AD75 software package   
    2) Method using the sequence program 
LED display function 
This function displays the D75P2 work status, signal status, error 
details, etc., on the 17-segment LED on the front of the main unit. 
The display details are changed over using the mode switch on the 
front of the main unit. 
Clock data function 
This function sets the PLC CPU clock data in the D75P2. 
This is used for various history data, etc.