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Time Delay Interrupt

Created by: Ner at: 2/15/2013 1:07 PM (2 Replies)

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2/15/2013 1:07 PM	Rate (0)
Ner Posts: 14 Rating: (1)	Dear all, I am trying to call OB20 (Time Delay Interrupt) by calling SFC32 (SRT_DINT) in OB1. I find the following description in Siemens manual for the input parameter of SFC32 : SIGN. "Identifier which appears in the start event information of the OB when the time-delay interrupt OB is called." Presently I have parameterized SFC32 as: OB_NR : 20 DTIME : T#10s SIGN : MW4 RET_VAL : #temp1 Question is whether code in OB20 will be executed? if so when? and for this what should i do with word MW4? BR.
Ner Posts: 14 Rating: (1)
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2/15/2013 3:04 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 2/21/2023 Posts: 6794 Rating: (1341)	Ner Dear all, I am trying to call OB20 (Time Delay Interrupt) by calling SFC32 (SRT_DINT) in OB1. I find the following description in Siemens manual for the input parameter of SFC32 : SIGN. "Identifier which appears in the start event information of the OB when the time-delay interrupt OB is called." Presently I have parameterized SFC32 as: OB_NR : 20 DTIME : T#10s SIGN : MW4 RET_VAL : #temp1 Question is whether code in OB20 will be executed? if so when? and for this what should i do with word MW4? BR. Hello , Test the followings with your hardware.Provide a s pulse in M200.0. OB1: [code] L W#16#ABCD T MW 4 // initialize identifier A M 200.0 // check trigger JCN ende CALL "SRT_DINT" // call SFC32 OB_NR :=20 DTIME :=T#10S SIGN :=MW4 RET_VAL:=MW8 CLR = M 200.0 // Make a short pulse on trigger ende: NOP 0 [/code] OB20 [code] L #OB20_SIGN T MW 10 L #OB20_DTIME T MW 12 /////////////////////////////// NOP 0 SET = Q 0.0[/code] Update you case.More information on STEP7 online manual or here: http://support.automation.siemens.com/WW/view/en/44240604 Best regards Hamid Hosseini
	Last edited by: hdhosseini at: 2/15/2013 3:06 PM Demo Channel on Youtube
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2/18/2013 6:59 AM	Rate (0)
Ner Posts: 14 Rating: (1)	Thanks hdhosseini, I understand now that SFC32 must be called on a pulse unlike time of day interrupt where we call SFC28 continuously
Ner Posts: 14 Rating: (1)
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