Real Time Clock in Schneider M340 PLC

I have a system installed in my company which have M340 PLC and it has a program which is used toh turn lights on and off. I am attaching program pic for reference. Now I have to change on/off time can anyone tell me how the time conversion works here.
Here time reads with %SW51 and it is defined as int data type.

http://www2.schneider-electric.com/resources/sites/SCHNEIDER_ELECTRIC/content/live/FAQS/238000/FA238920/en_US/simulator.pdf
The above link will show you the registers that are associated with the real time clock in this PLC. %SW51: Hours and Minutes (16#HHMM)
The program should have a series of compare instructions to turn on/off the outputs.

Regards,

The %sw49 to %sw53 are in BCD - Binary Coded Decimal. You will have to use BCD_to_Int Function block to have a readable time. %S50 must be set first to allow editting of the PLC timeclock.

http://www.plctalk.net/qanda/showthread.php?t=81589

Previous thread on M340 Timeclock.

There are easier ways to do this with function blocks in the library. Attached is a picture of the different realt time clock function blocks

It can be configured to use a time server, but it only accepts IP addresses.
Because of this, I wrote a script in the hmi to update the plc clock.

RTC_Compare:= EQUAL_ARINT(Hours_6,Hour_memory_6);
(*EQUAL_ARINT(Hours_6,Hour_memory_6) > -1*)
IF (RTC_Compare > -1) THEN (*if time/date set words were changed, then set clock*)

SET(%S50);

%SW50 := INT_TO_BCD(Hours_6[2] * 100);(*seconds*)
%SW51 := INT_TO_BCD((Hours_6[0] * 100) + Hours_6[1]);(*hours and minutes*)
%SW52 := INT_TO_BCD((Hours_6[3] * 100) + Hours_6[4]);(*month and day*)
%SW53 := INT_TO_BCD(Hours_6[5]);(*year*)


ELSE (*if no change in set words, just update them to the clock values*)
(*display hh mm ss mm dd yyyy MW2161-MW2166 *)
Hours_6[0] := BCD_TO_INT(%SW51 / 256);(*hours*)
Hours_6[1] := BCD_TO_INT(%SW51 MOD 256);(*minutes*)
Hours_6[2] := BCD_TO_INT(%SW50 / 256);(*seconds*)
Hours_6[3] := BCD_TO_INT(%SW52 / 256);(*month*)
Hours_6[4] := BCD_TO_INT(%SW52 MOD 256);(*day*)
Hours_6[5] := BCD_TO_INT(%SW53);(*year*)
IF (%S50) THEN
RESET(%S50);
END_IF;
END_IF;

Hour_memory_6 := Hours_6 ;(*set memory words to detect any change next scan*)