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Read_Clock SFC1

1/3/2012 4:03 PM	Rate (0)
Gopala krishnan Posts: 20 Rating: (0)	Hi I have a doubt, The SFC1(Read Clk) From where it is read the date and time in PLC CPU or server system and in the STL program L LB 0 --------------- what is LB 0,LB 1 and where it is read the data , If we check in the local application(For reference) it is not available BTI T #YYYY // YEAR L LB 1 BTI T #MM // MONTH Please anybody explain me
Gopala krishnan Posts: 20 Rating: (0)
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1/3/2012 4:29 PM	Rate (1)
BeVee Platinum Member Joined: 7/18/2011 Last visit: 4/11/2025 Posts: 521 Rating: (91)	Gopala krishnan L LB 0 --------------- what is LB 0,LB 1 and where it is read the data , If we check in the local application(For reference) it is not available BTI T #YYYY // YEAR L LB 1 BTI T #MM // MONTH Hello Gopala, LB 0 and LB1 are bytes from temporary variables area. I think temp variables contain a variable from type DATE&TIME which start at local address 0 LB 0 refers to byte that contains the year of this variable LB 1 refers to byte that contains the month of this variable ... For more information about structure of variable type DATE&TIME check S7 help for more details. Hope this information can solve your doubt. Kind regards, BV

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1/5/2012 4:00 PM	Rate (0)
Gopala krishnan Posts: 20 Rating: (0)	Hi Be vee But i checkeed in the Variable table there is no address created.. If it is in the variable table LB0 how it is read the Year i want to know that one
Gopala krishnan Posts: 20 Rating: (0)
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1/5/2012 4:11 PM	Rate (0)
BeVee Platinum Member Joined: 7/18/2011 Last visit: 4/11/2025 Posts: 521 Rating: (91)	Hi Gopala You canNOT monitor local variables in a variable table. Local variables are only valid within the calling block (FC,FB) You can monitor the calling block if you want to see their value. Kind regards, BV

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1/5/2012 4:43 PM	Rate (0)
Gabriel de Oliveira Silver Member Joined: 2/16/2011 Last visit: 4/28/2025 Posts: 229 Rating: (28)	Hello, Create others temp varaibles of type of byte and change with LMB0 and LMB1 to test. If you want to monitor the value in a VAT, inside the block, insert a "move" of LMB0 to a MB memory. L LB 0 T MBX L LB1 T MBX
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