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ET200SP Energy Meter - Wrong current measurement on L1

Created by: MatsNil at: 12/4/2014 3:14 PM (3 Replies)

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12/4/2014 3:14 PM	Rate (0)
MatsNil Posts: 46 Rating: (4)	Hi Running on following setup: S7-1212 C : fw 4.0 ET200SP: fw ver 3.0 8xAI Energy meter : fw. ver 2.0 TIA portal S7 prof v13 upd 6 We are having issues with current measurement on L1 phase for all our energymeters. It seems to be measuring about half the value of the other two phases. This is the case for all the energymeters on the same rack. We have checked our connections and measuringtransformers. They seem to check out fine (swapped around things to exclude faults). The config setup also matches actual hardware. Using Watchtables to monitor Input Words of relevant energymeters. Any ideas? BR Mats and Jorgen
MatsNil Posts: 46 Rating: (4)
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12/4/2014 4:33 PM	Rate (0)
eisenpferdreiter Posts: 1058 Rating: (93)	MatsNil Hi Running on following setup: S7-1212 C : fw 4.0 ET200SP: fw ver 3.0 8xAI Energy meter : fw. ver 2.0 TIA portal S7 prof v13 upd 6 We are having issues with current measurement on L1 phase for all our energymeters. It seems to be measuring about half the value of the other two phases. This is the case for all the energymeters on the same rack. We have checked our connections and measuringtransformers. They seem to check out fine (swapped around things to exclude faults). The config setup also matches actual hardware. Using Watchtables to monitor Input Words of relevant energymeters. Any ideas? BR Mats and Jorgen Hello MatsNil, I assume that you have analog inputs with 0/4 to 20mA. I once had a similar problem with wrong measurement. It turned out that the reason was the supply. Do you use supply from input card or external supply? regards
eisenpferdreiter Posts: 1058 Rating: (93)
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12/5/2014 8:41 AM	Rate (0)
MatsNil Posts: 46 Rating: (4)	My description of the modules were a bit vague. We are using the Energy Meter for ET200SP (6ES7134-6PA00-0BD0) https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&siteid=cseus&aktprim=0&extranet=standard&viewreg=WW&objid=58532523&treeLang=en So there is no 0/4-20mA.
MatsNil Posts: 46 Rating: (4)
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12/15/2014 10:56 AM	Rate (0)
hiramajo Posts: 1 Rating: (0)	Hi. Problem solved. Faulty hardware. Siemens support informed us that there had been a problem with the machine that calibrates these cards.
hiramajo Posts: 1 Rating: (0)
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