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How do you synchronize the date and time between an PC and an S7-300/S7-400 controller with WinCC ?

Created by: samkcr at: 5/28/2009 7:09 PM (15 Replies)

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5/28/2009 7:09 PM	Rate (0)
samkcr Bronze Member Joined: 3/24/2009 Last visit: 8/7/2023 Posts: 406 Rating: (3)	Hi.... How do you synchronize the date and time between an PC and an S7-300/S7-400 controller with WinCC ?
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5/28/2009 7:55 PM	Rate (0)
daga Gold Member Joined: 3/18/2009 Last visit: 12/6/2024 Posts: 306 Rating: (94)	Hi samkcr, The question is very generic. There is lot of information on time synchronization available on this site. To help you on this the following information will be helpful Who will be time master? How are all components networked How many of them have an internal clock? Have a look at this manual for PCS7 ontime synchronization. Even though you are using PLC-WinCC, the fundamentals remain same and you can use this to "plan" and get started. Hope it helps.

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5/29/2009 4:59 PM	Rate (0)
samkcr Bronze Member Joined: 3/24/2009 Last visit: 8/7/2023 Posts: 406 Rating: (3)	Hi... Thanks for your reply.... My system consists of CPU 414-4H,CP443-1and ET200Mstationswith wincc pc station ( 2 server 2client & 1workstation )using ethernet communication. Master is CPU only.... I have to synchronizethe time of these5PCs....... Is it a difficult process to achieve this?
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6/2/2009 7:11 AM	Rate (1)
daga Gold Member Joined: 3/18/2009 Last visit: 12/6/2024 Posts: 306 Rating: (94)	Hi samkcr, No, it is not very difficult. It is a matter of few settings (in HW config and your Wincc projects) When you say workstation, what do you mean? Engineering Station? Is it always ON? regards

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6/2/2009 7:24 AM	Rate (1)
umencho Diamond Member Joined: 3/21/2006 Last visit: 1/14/2025 Posts: 10239 Rating: (1182)	Hello, Perhaps following FAQ will be useful - How can you set the time of an S7 controller from WinCC? There you'll find tricks for time-of-day synchronization via Industrial Ethernet. Hope this will helps. Best regards Hristo Mihalev

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6/2/2009 3:39 PM	Rate (1)
cumulus Platinum Member Joined: 9/27/2007 Last visit: 12/18/2020 Posts: 993 Rating: (103)	Hi that FAQ is not a syncronisation, it is a time set.The times in PC and S7 can have differnces up to 500ms. The two linked FAQsare real time syncronisations. regards cumulus
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6/2/2009 8:23 PM	Rate (0)
samkcr Bronze Member Joined: 3/24/2009 Last visit: 8/7/2023 Posts: 406 Rating: (3)	Hi... Ya it is engg station.... But all computers are always on only.... I am telling that workstation in the sense program development station...... what are all the settings we have to give? I taught that it is some what complicated?
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6/2/2009 9:58 PM	Rate (2)
daga Gold Member Joined: 3/18/2009 Last visit: 12/6/2024 Posts: 306 Rating: (94)	I will suggest that you keep your OS server as Time master. It is standard recommendation as well. I believe there is at least one confusing blunder in the above mentioned manual which complicates things.HenceI have extracted and attached the relevant pages from the original manual. (Ignore the page numbers at bottom) For OS servers and clients you do the setting in the WinCC project in TimeSynchronization For AS you do the setting in PLC, CP 443-1 and if required in CP443-5 For ES you need to use a free tool called DCF77 client service Certain alarm messages may not be available in your case as you are doing a wincc-step 7 configuration and not PCS7. Point to remember: Do not change the time on servers after making it a time master...if you do you have to reconfigure it again as time master. The PLC is running on UTC time, while all PCs display local time if you use the recommended settings. Hope it helps... Attachment Time.zip (1035 Downloads)

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This contribution was helpful to 1 thankful Users Shiyas

6/3/2009 7:17 PM	Rate (0)
samkcr Bronze Member Joined: 3/24/2009 Last visit: 8/7/2023 Posts: 406 Rating: (3)	Hi..... Thanks a lot..... I think it is more helpful to me...... May i know one thing..... Your recommendations is through os server is there any specifc reason?
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6/3/2009 7:43 PM	Rate (1)
daga Gold Member Joined: 3/18/2009 Last visit: 12/6/2024 Posts: 306 Rating: (94)	well, one of the reason being that OS servers are on both plant and terminal bus. If you were to make PLC as time master, then the wincc client PCs which have no direct connection to PLC, will anyways have to synchronize only through the os servers. Also, in bigger projects you will see that you have more than one AS (or PLCs), but a single OS server pair. In that case, there is no guideline to select which PLC is to be selected as time master. In your case, you can still try making the PLCs as time master. I beleive it would work fine. But remember to set UTC time on PLC (and not the local time) if you are following the recommended WinCC OS project settings.
	Last edited by: daga at: 6/3/2009 7:47 PM
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