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Power tag

Created by: RAJKIRAN at: 5/11/2012 7:34 AM (8 Replies)

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Thanks 13

9 Entries

5/11/2012 7:34 AM	Rate (0)
RAJKIRAN Silver Member Joined: 8/18/2009 Last visit: 7/28/2025 Posts: 558 Rating: (33)	Dear Expert, In our project we used less tag licence so we want to used power tag... so please tell me where I get detailed info. regarding this also if any sample project is available it will be very helpful for me...
	Rajkiran Patil
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5/11/2012 7:43 AM	Rate (0)
playerslight Posts: 1064 Rating: (72)	To reduce you tag count bring over words or better yet double words instead of bits 1 bit =- tag 1 word = 1 tagor 16 bits 1 double word = 1 tag or 32 bits
playerslight Posts: 1064 Rating: (72)
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5/11/2012 7:49 AM	Rate (1)
manmeet Gold Member Joined: 1/3/2006 Last visit: 10/7/2025 Posts: 726 Rating: (71)	Dear Rajkiran All the PLC tags which you have used are power tags. (Internal tags are not counted as power tags) You need to have license for using more power tags else use above mentioned method.
	Last edited by: manmeet at: 5/11/2012 7:50 AM
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This contribution was helpful to 2 thankful Users playerslight AutoGen_910592

5/11/2012 7:57 AM	Rate (0)
BeVee Platinum Member Joined: 7/18/2011 Last visit: 4/11/2025 Posts: 521 Rating: (91)	Hello Rajkiran, For the alarmbits you can use an array of words. If you don't need alarmbits separately, this can save you some powertags too. KInd regards, BV

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5/11/2012 8:50 AM	Rate (0)
RAJKIRAN Silver Member Joined: 8/18/2009 Last visit: 7/28/2025 Posts: 558 Rating: (33)	thanks... I want to reduce my tag by using above method... but I want help doc.& sample project .. could you help for this..
	Rajkiran Patil
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5/11/2012 1:09 PM	Rate (2)
Ayman Elotaify Diamond Expert Joined: 5/28/2008 Last visit: 1/3/2026 Posts: 4522 Rating: (843)	RAJKIRAN thanks... I want to reduce my tag by using above method... but I want help doc.& sample project .. could you help for this.. Hello RAJKIRAN, I am not sure if there are documents descripe how to do it. Let me explain it for you. This method require from you planning before starting the project on how the data will be exchanged between PLC & HMI. Arrangement of bits is very important. The trick is to arrange bits that you need to call from HMI together in the same Word or DWord. And then that Word / DWord is defined as a tag in WinCC flexible. And when you implement object in WinCC flexible, you will use bit in tag. Foe example. If you have 100 DOL motor, each motor have RUN feed back signal, ON/OFF toggle button. Then two bits is required for each one. You can define 200 bits as 200 power tags. And you can define only 7 DWord (32 bits x 7 ) = 224 bits. So, you saved about 193 power tags. Hope my explanation helps.
	Ayman Elotaify
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This contribution was helpful to 3 thankful Users playerslight belze Rafn93

5/11/2012 1:34 PM	Rate (0)
Amit_86 Posts: 1750 Rating: (272)	BeVee Hello Rajkiran, For the alarmbits you can use an array of words. If you don't need alarmbits separately, this can save you some powertags too. KInd regards, BV Hello Bevee, A little bit correction. For Alarm generation in wincc/wincc flexible, you must have to create word tag. With bit tag you cannot configure Alarms in wincc and wincc flexible as well.
Amit_86 Posts: 1750 Rating: (272)
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5/15/2012 7:27 AM	Rate (0)
RAJKIRAN Silver Member Joined: 8/18/2009 Last visit: 7/28/2025 Posts: 558 Rating: (33)	Hello all, I understood what are you all describe but I have read that no. of tag word(sequence) is something different... I have seen before this in doc.but not get now ... what is no. method of tag...
	Last edited by: RAJKIRAN at: 5/15/2012 7:27 AM Rajkiran Patil
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5/15/2012 8:44 AM	Rate (6)
Ayman Elotaify Diamond Expert Joined: 5/28/2008 Last visit: 1/3/2026 Posts: 4522 Rating: (843)	Hello RAJKIRAN, Let's go back to basics and deffinations. What's meant by tag in general? Tags correspond to defined memory areas on the HMI device, to which values are writtenand/or from which values are read. This action can be initiated by the PLC, or by theoperator at the HMI device.And there are two main types of tags: External Tag. External tags enable the communication (data exchange) between the components of anautomation process, e.g. between the HMI device and the PLC. Principle: An external tag is the image of a defined memory location in the PLC. You have read andwrite access to this storage location from both the HMI device and the PLC.Since external tags are the image of a storage location in the PLC, the applicable data typesdepend on the PLC which is connected to the HMI device. If you configure in STEP 7 or SIMOTION Scout integrated, you may directly access all tagswhen creating the external tags, which were created with STEP 7 or SIMOTION Scoutduring the programming of the PLC.When working on distributed systems, you can directly access the tags of the other HMIsystems using the OPC interface. Data Types: Basic data types are available for all configurations.In addition, you can also use other data types for external tags which are intendedspecifically for the PLC to which a connection exists.A detailed listing of the basic data types and the data types for a connection to S7 controllerscan be found under "Data types if connecting to S7". Information about data types which areavailable for connection to other PLCs can be found in the documentation about therespective communication drivers.In addition, you can create your own data types by creating structures. Internal Tag. Internal tags do not have any connection to the PLC. Internal tags are stored in the memory of the HMI device. Therefore, only this HMI devicehas read and write access to the internal tags. You create internal tags, for example, in orderto execute local calculations. References: SIMATIC HMI WinCC flexible 2008 WinCC flexible 2008 Runtime SIMATIC HMI WinCC flexible 2008 WinCC flexible 2008 Compact/ Standard/ Advanced Notes: As power tags are defined as the following: Tags correspond to defined memory areas on the HMI device, to which values are writtenand/or from which values are read. This action can be initiated by the PLC, or by theoperator at the HMI device. Then only external tags can be called as power tags. And it can be of any type, bit, byte, word, doubleword,...etc. We can not tell you exactllyhow much power tags you will need by knowing total number of I/Os. Thus because, you may have a small system consists of 100 I/O. May be you will need only 100 power tags, May be less and may be more! If you will make some arithmatic calculations inside the PLC and then link the inputs and outputs of this arithmatic calculation on the HMI, then it will counts number of power tags. If you have some areas of memory called input field, it's not a physical inputs in the PLC, it will counts number of power tags. Let me descripe it in a small scale: Suppose you have a room and you make a temperature control for this room using a regulated valve (AO), Fan (1 DI for feedback + 1 DO for command) and read actual temp (AI). Then Number of I/Os are 1DI + 1DO + 1AI + 1AO. In the HMI, you will put setpoint input field (one more power tag). In the Step7 program, you will make a PID and you will define P,I & D parameters. If you would like operator to adjust these parameters, then you will link them on the HMI which will count also on the number of power tags (3 more power tags). And you can make 3 more extra power tag to enable or disable P, I, or D. You may calculate difference between setpoint and actual (error), which means one more power tag. So, this small example can consume about 12 power tags. It can consume less and also it can consume more! It depends about how would you program the system, what are the features required. Hope this helps.
	Ayman Elotaify
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This contribution was helpful to 8 thankful Users rvalente AutoGen_675983 TØ. Khuongnd nunobnk moh_gobran2010 maverick101 TuanVA

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