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Lifebit Error in SIWAREX MS

Created by: segan at: 8/29/2010 12:17 PM (10 Replies)

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8/29/2010 12:17 PM	Rate (0)
segan Posts: 60 Rating: (2)	Hi, When using a SIWAREX MS with S7 200 PLC, the settings for the SIWAREX MS was downloaded using SIWATOOL. The Getting started program was used for initial calibration. The Lifebit error isoccurring. What is that error and how should this be solved ?
segan Posts: 60 Rating: (2)
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8/30/2010 8:41 AM	Rate (1)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/2/2024 Posts: 1152 Rating: (175)	Hello Senbaga Ganesh, The Lifebit-Error means, that there is no communication between the PLC and the Siwarex MS module! This error disappears automatically, when the communication works correctly between the PLC and the Siwarex MS module. This error can be caused by the following items: 1. The analog input range (AEW)must not to be filteredfor the SIWAREX MS! The check marks must to be removed from the Input Filters. (See also chapter 8.2 (Figure 8-2) of the Siwarex MS manual. You can find this manual on the internet by logging on to: http://support.automation.siemens.com/WW/view/en/22600601 ). 2. Which Input/Output addresses have the Siwarex MS module? (See also chapter 8.2 (Figure 8-3)) You can see the used Input/Output addresses into the"PLC Information". These Input/Output addresses have to apply for the parameters of the “MicroScale_V20” library: - First_AEW - Second_AEW - Third_AEW - Fourth_AEW - First_AAW - Second_AAW - Third_AAW - Fourth_AAW 3. Is there a third module between the PLC and the Siwarex MS module? This module needs to have the24VDC power supply. Only with 24VDC, the S7-data-bus works correctly between the PLC and the Siwarex MS module. 4. How long isthe PLC-program-cycle? If the PLC-program-cycle is longer than 500ms, this error also occurs. You can find the PLC-program-cycle as “Scan Rates (ms)” into the"PLC Information". Best regards Siwarexi

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8/30/2010 12:17 PM	Rate (0)
segan Posts: 60 Rating: (2)	I'm using Microscale Library Version v1.0 in the project. Where can i get the Microscale Library Version v2.0 also what are the differences between two versions? Is it only v2.0 should be used and v1.0 shouldn't be used ??
segan Posts: 60 Rating: (2)
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8/30/2010 3:04 PM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/2/2024 Posts: 1152 Rating: (175)	Hello Senbaga Ganesh, If you are using the Microscale Library Version v1.0, it is not possible to read/write parameters from/to the Siwarex MS module. On the Configuration package CD (7MH4930-0AK01), you can find the Microscale Library Version v2.0. But anyway, you can also use the Microscale Library Version v1.0, if you only want to read the weight value. Also with the Microscale Library Version v1.0, the lifebit error mustn’t occur. Best regards Siwarexi

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8/30/2010 3:37 PM	Rate (0)
segan Posts: 60 Rating: (2)	What do u mean by parameters ? I'm using Microscale v1.0 and i'm writing the command code, command trigger. Then what else can't be read / written from or to the SIWAREX MS? Is SIWATOOL required when using both the libraries?
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8/30/2010 4:35 PM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/2/2024 Posts: 1152 Rating: (175)	Hello Senbaga Ganesh, I mean all the parameters, which you can also change into Siwatool: “Adjustment weight 1”, “Characteristic value”, … . You can use only one Micro Scale library. Best regards Siwarexi

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8/31/2010 1:38 PM	Rate (0)
segan Posts: 60 Rating: (2)	I can't get you. Can i have more clarity on this? Siwarexi Hello Senbaga Ganesh, I mean all the parameters, which you can also change into Siwatool: “Adjustment weight 1”, “Characteristic value”, … . You can use only one Micro Scale library. Best regards Siwarexi
segan Posts: 60 Rating: (2)
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8/31/2010 2:55 PM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/2/2024 Posts: 1152 Rating: (175)	Hello Senbaga Ganesh, With the Siwatool software, you can change a lot of parameters. I mean, the settings for the SIWAREX MS, which you can download from the Siwtool software to the Siwarex MS module. All these parameters, which you can change with the Siwatool software, you can also change via Step7, if you are using the Microscale Library Version v2.0. Best regards Siwarexi

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9/1/2010 6:17 AM	Rate (0)
segan Posts: 60 Rating: (2)	It's more clear now. So Microscale Library v2.0 can perform all operations as that of SIWATOOL. Does Microscale Library v1.0 supports all the operations of SIWATOOL?
segan Posts: 60 Rating: (2)
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9/1/2010 8:35 AM	Rate (0)
Siwarexi Gold Expert Joined: 1/4/2007 Last visit: 12/2/2024 Posts: 1152 Rating: (175)	HelloSenbaga Ganesh, “Microscale Library v2.0 can perform all operations as that of SIWATOOL.“ => Yes “Does Microscale Library v1.0 supports all the operations of SIWATOOL?” => No! You can read only the weight value and send some commands, like taring or zeroing, to the Siwarex MS module. Best regards Siwarexi

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