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Change time in a timer

7/18/2007 2:42 PM	Rate (0)
one2three Posts: 37 Rating: (1)	Hi! Is it possible to change the timeofa 'on dealy timer' via a mp277 touch panel? I've manage to change the time, but the timer dosnt count down. I think that my solution isnt the right one. I'm sending 1 int and then multiply with 256 in my s7 project, then move it to a dbw (time) and then I use that as a time on my 'on delat timer' but it feels like the panel is "holding" the value so my timer cant count down. What is the right way to make this happen? I can't be the first one wanting to change the time of a timer, but still I can't find anyone else asking about it. Thanks in advance Johan
one2three Posts: 37 Rating: (1)
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7/18/2007 2:59 PM	Rate (0)
Wizard Diamond Expert Joined: 4/24/2006 Last visit: 7/31/2025 Posts: 9027 Rating: (1199)	Hello, Have you seen these links: http://support.automation.siemens.com/WW/view/en/23992560 http://support.automation.siemens.com/WW/view/en/9125571 Perhaps it's usefull Best regards, Wizard

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7/25/2007 5:07 PM	Rate (0)
Mojo Bronze Member Joined: 3/27/2006 Last visit: 4/22/2025 Posts: 90 Rating: (13)	If your plc is using S5 timers you can only affect a change in the timer preset when the timer is not enabled. S5 timers look at the preset one time: when first enabled. Once the timer starts timing you can change the preset but it will not affect the timer until the next time the timer is enabled. When I have an application in which this limitation is not acceptable I will use a "homemade" timer.
	"I never let a cowboy make the coffee." Yeah, thats what Granny always said to my Grandad. And he'd say: "Never tell a joke that ain't that funny more than once." "And if you wanna hear God laugh, tell Him your plans." Van Zant "Help Somebody"
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7/25/2007 5:11 PM	Rate (0)
Mojo Bronze Member Joined: 3/27/2006 Last visit: 4/22/2025 Posts: 90 Rating: (13)	See my post in this thread for more information on usint INT format setpoints in your HMI application. The PLC code will convert the INT to S5Time format. /tf/WW/en/Posts/7947
	"I never let a cowboy make the coffee." Yeah, thats what Granny always said to my Grandad. And he'd say: "Never tell a joke that ain't that funny more than once." "And if you wanna hear God laugh, tell Him your plans." Van Zant "Help Somebody"
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