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Alarm Logging and @CurrentUser problem

Created by: kukukk at: 3/8/2007 11:10 AM (9 Replies)

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3/8/2007 11:10 AM	Rate (0)
kukukk Posts: 133 Rating: (5)	Hi! I have 2 users: level0 and level1. I'm logged in with level0 when an alarm appears. After the alarm appeared I logout and login with level1 user and I acknowledge the alarm. Then the alarm disappears. But in long-term alarm logging at acknowledge appears the level0 user, not the level1. So: 1. Login with level0 user. 2. Alarm appears. 3. In long-term archive appear the "alarm appeared" with level0 user in Process Value (@CurrentUser) 4. Logout with level0 user. 5. Login with level1 user. 6. Acknowledge the alarm. 7. In long-term archive appear the "acknowledgment" with level0 user in Process Value (@CurrentUser) 8. Alarm disappears. 7. In long-term archive appear the "alarm disappeard" with level1 user in Process Value (@CurrentUser) When the alarm is acknowledged, in Process Value appears the user who was logged in when the alarm appeard. I need to save the user who acknowledged the alarm... I have tried to used the "User name" from System block, but it is empty in alarm logging How can I resolve this problem? Thanks in advance, Balogh Szabolcs
kukukk Posts: 133 Rating: (5)
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3/8/2007 12:20 PM	Rate (0)
Danielle Posts: 1275 Rating: (123)	Hi, This has been discussed in the past. Take a look at this post. It has a workaround for your problem. Best regards, Danielle
Danielle Posts: 1275 Rating: (123)	Last edited by: Danielle at: 08.03.2007 12:25 Last edited by: Danielle at: 08.03.2007 12:21
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3/8/2007 1:16 PM	Rate (0)
kukukk Posts: 133 Rating: (5)	Thanks for your replay and sorry :} I have read that thread, and I think i know how it is working... "The Alarm Acknowledge button contains C action" -> This function is the "OnBtnSinglAckn" function from Global Script -> Standard functions -> Alarms?. Can I use this method for analog alarms? Or I have to verify the analog values in a Tag triggered Global action script and to set an internal tag when the analog value reached the limit? This is a bug, or future? :}} P.S. What happens if I don't acknowledge the alarm before it is going out? So: 1. Alarm came in 2. Alarm went out 3. Alarm was acknowledged (i can't verify the alarm bit status, because this is 0) And if I want to acknowledge only one alarm (only the selected alarm from message list), not all active alarms? Thanks, Balogh Szabolcs
kukukk Posts: 133 Rating: (5)	Last edited by: kukukk at: 08.03.2007 14:01
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3/8/2007 1:51 PM

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Danielle

Posts: 1275

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(123)

Hi,

This is from that thread:

1.Internaltags areused to display that the alarm was acknowledged. There is a corresponding internalbit for each individual alarm.

2.These internal bits are used fora new message classin Alarm Logging. This enables the color of the log entry to be different than the other classes.The selection 'Messages Without Status "Went Out"' is made so that these entries only appear in runtime when they come in.

3. The Alarm Acknowledge button contains C action that turns on the appropriate internal alarm ack. bit for the alarm.
Example code for two alarms:

bstate1=GetTagBit("D25_Alarm_001");
if(bstate1)
{
SetTagBit("D25_Alarm_Ack_001",TRUE);
}

What the user meant is: he created internal tags with ack status for each alarm tag. He created that C-script, which will set these internal tags. The internal tags are used in Alarm logging, setting a new class of alarms.
For analog alarms you'd have to check if that tag's current value is an alarm value, andif so, set the internal ack bit.

3/9/2007 7:25 AM	Rate (0)
kukukk Posts: 133 Rating: (5)	Hi, How can I define a C action for acknowledge button? In Graphics Designer I have a WinCC Alarm Control. Right click -> Properties -> Events, but I can't find the Acknowledge button. I have to make it in Global script using Standard functions for alarms? (AXC_OnBtnSinglAckn, AXC_OnBtnVisibleAckn, OnBtnSinglAckn, OnBtnVisibleAckn) What happens If I acknowledge the alarm after the alarm went out? bstate1=GetTagBit("D25_Alarm_001"); <- Will return False, because the alarm is not active. I don't want to acknowledge all active alarms. Only the selected alarm form Message list. How can I get the selected alarm from message list? (If I can get the selected alarm/row from list I can use the alarm Number field to identify the alarm) Thanks, Balogh Szabolcs
kukukk Posts: 133 Rating: (5)
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3/9/2007 1:02 PM	Rate (0)
Danielle Posts: 1275 Rating: (123)	Hi Balogh, Yes, to use the C-action you can create your own acknowledge button, and set it to acknowledgethe desiredmessages, using the standard functions. When the alarm comes in and goes out unacknowledged, you really won't set the internal bit. But I think the conception of the script is that active alarms' acknowledgement should have the user logged, but if the alarm is innactive, that systemdidn'trequire a log. If your system does, you'll need to adjust the script.
Danielle Posts: 1275 Rating: (123)
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3/13/2007 10:12 AM	Rate (0)
kukukk Posts: 133 Rating: (5)	Hi! I have tried some possible solution to resolve my problem... For digital alarms, when the alarm appeares, set an internal tag. And I use this internal tag, for acknowledgement. In this way I can acknoledge the alarm even if it went out. For analog alarms, I can't use the process value blocks, because for @CurrentUser appears a numeric number. I don't know why... So for alarm logging the only possible solution (based on my knowledge of wincc) is using a separate, tag triggered global action for each tag (the trigger is the tag itself), and in this action I compare the tag value with each limit (lowlow, low, high, highhigh) and set an alarm tag (an internal tag for each limit). And for each alarm tag I need an internal tag for acknoledgement. So... I can resolve the problem, but the solution is very complicated. I have tried to copy the @CurrentUser value to an internal tag, and I used this tag in process value blocks. But when I acknowledge an alarm this value is not refreshed. What is happening when someone acknowledge an alarm? The process value blocks are not refreshed just copied from the last alarm registration (came in/went out)? There is no patch for WinCC to modify the acknowledgement system to make refresh when someone make an acknowledge? Thanks, Balogh Szabolcs
kukukk Posts: 133 Rating: (5)
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3/13/2007 12:29 PM	Rate (0)
Danielle Posts: 1275 Rating: (123)	kukukk For analog alarms, I can't use the process value blocks, because for @CurrentUser appears a numeric number. I don't know why... So for alarm logging the only possible solution (based on my knowledge of wincc) is using a separate, tag triggered global action for each tag (the trigger is the tag itself), and in this action I compare the tag value with each limit (lowlow, low, high, highhigh) and set an alarm tag (an internal tag for each limit). And for each alarm tag I need an internal tag for acknoledgement. Hi Balogh, Have you thought about doing this in the PLC?You check the limits on the PLC and ifthere is an alarm, a bit is set. With that you'd have all alarms as bits. You should avoid too much scripting on the WinCC side.And that would make your system "cleaner", since you'd have a pattern for all alarms. I agree with you on the need to improve the acknowledgement of alarms, I hope Siemens intends to do something about that soon. Best regards, Danielle
Danielle Posts: 1275 Rating: (123)
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3/13/2007 1:48 PM	Rate (0)
kukukk Posts: 133 Rating: (5)	Hi! I will check the limits on PLC, but I need more tags: 4 tags for every analog value - if I have lowlow (alarm), low (warning), high (warning), highhigh (alarm) limits; and I have 13 stations... I can send using a single tag (byte), but then I need a script to get the corresponding alarm bits... It would be very easy with that modification on acknowledgement system :}} I need it :}} But anyway... thanks for your help, Balogh Szabolcs
kukukk Posts: 133 Rating: (5)
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3/13/2007 2:21 PM	Rate (0)
Danielle Posts: 1275 Rating: (123)	kukukk I can send using a single tag (byte), but then I need a script to get the corresponding alarm bits... Hi Balogh, You wouldn't need a script, since Alarm Logging does access bit within bytes!
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Created by: kukukk at: 3/8/2007 11:10 AM (9 Replies)

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Last edited by: Danielle at: 08.03.2007 12:25

Last edited by: Danielle at: 08.03.2007 12:21

Last edited by: kukukk at: 08.03.2007 14:01

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