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Old May 22nd, 2020, 07:44 PM   #1
marvis
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From Rockwell to Siemens Rung HELP

Hello guys,

please help me, I am a newbie on Step7.

I am working on a new project and I need to "translate" from Rockwell to Siemens this rung.. but sorry.. I need your help!

Thanks in advice.
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Old May 22nd, 2020, 08:21 PM   #2
GaryS
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it looks like a flasher to ,5 sec off and1 sec on
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Old May 22nd, 2020, 08:22 PM   #3
MOL13
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Hello Marvis, it is not difficult actually.
TON = S_EVERZ, write S5T#500MS in PRESET TIMER INPUT, this auto recognize the basetime.
ONS = |P| Edge P (Rising edge)

Press F1 on timer and you see a good explanation about terminal Q and "Timer Name" Mark.
Good Luck.
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Old May 22nd, 2020, 08:24 PM   #4
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0.5 sec and 1 sec.
Regards!
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Old May 23rd, 2020, 04:11 AM   #5
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Ok, thanks very much! I am working about it!

Only one question: How can I do with "TOF" timers and "TON.EN" ?

Thanks in advance.
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Old May 23rd, 2020, 04:23 AM   #6
parky
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The EN Bit is just a reflection of the logic that enables the timer
The DN bit is the time done bit. (equivalent of the Q output in S7)
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Old May 23rd, 2020, 04:25 AM   #7
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Ok thank you very much!

And for "TOF" timer?
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Old May 23rd, 2020, 04:57 AM   #8
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The TOF timer DN bit Goes high when the logic to start the timer goes high and turns off when the timer equals the pre-set

The top rung: If A is true and B is false it starts the TON timer, the EN bit is OR(ed) around A so if A goes false the timer is Latched in or the timer will reset.

The TOF timer is initiated by the TON timer , The TOF.DN bit goes high for the time in the accumulator, the NOT TOF.DN in top rung just releases the latch (TOF timer is initiated by a pulse so the DN bit is set high until the timer.ACC value = the pre set).
(assuming A is already off).

Last edited by parky; May 23rd, 2020 at 05:06 AM.
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Old May 23rd, 2020, 05:06 AM   #9
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Thank you very much.
I work about it.

Thanks.
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Old May 23rd, 2020, 05:24 AM   #10
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I don't believe the Siemens timer has an EN bit (can't remember) but you could create a latch with a bit it's the same thing.
See pic, I do not have S7 on this pc but this is sort of what it would look like
Note: The latch will not drop out unless A goes false so the pulse of 0.5 sec will only trigger once until A goes false again.
Forgot to add, the contact with the up arrow is the equivalent of the Siemens one shot or pulse instruction so similar to RW.
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Last edited by parky; May 23rd, 2020 at 05:27 AM.
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Old May 23rd, 2020, 05:28 AM   #11
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Great!
But where I can find the TON/TOF block like this?? In Step 7 I don’t have/find its..
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Old May 23rd, 2020, 05:30 AM   #12
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Give us a few minutes & I will boot up my other PC I have it on there & try to show you. As I say, it's been some time since I used S7 so may take me a little time to code it
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Old May 23rd, 2020, 05:31 AM   #13
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Thanks in advance!
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Old May 23rd, 2020, 06:00 AM   #14
L D[AR2,P#0.0]
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Drag the blocks from the library onto your network
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S7-300 to 1500 conversions done - email to s7conversions@hotmail.com
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Old May 23rd, 2020, 06:16 AM   #15
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Perfect!

Thank you very much!
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