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How to Read the Protection Function Setting From SEPAM 20, 40,60 and 80 via Modbus Communication

It is possible for the third party software application to read the current configuration on SEPAM 20, 40 and 80. PMC Modbus is used in this example to explain the method to read the configuration via modbus channel.
Please refer to the following procedure for reading the configuration setting via Modbus Channel

  • Check the Function Identifier of the corresponding ANSI Protection Function. Please refer to the attachment for the information of the Function Identifier.
    Write the Function Identifier to the modbus address 8321d. For example, You would like to read the configuration of ANSI46 Negative Sequence / unbalance from SEPAM 20. The Function Code of ANSI46 on SEPAM 20 is 03 and the Unit Number of ANSI46 on SEPAM 20 is 01. Then you shall write the value 0301h into modbus address 8321d
    Read the modbus address from 8193d to 8201d (9 words). Base on the reading value,

The meaning of the reading value is
  • a) This protection function is enabled (Modbus Address 8194 and 8195)
    b) IDMT Curve is selected (Modbus Address 8196 and 8197)
    c) Is set Point = 48% Ib (Modbus Address 8198 and 8199)
    d) Tripping Time Delay = 160ms (Modbus Address 8200 and 8201)

  • AEDL3

Last Revised: 26 Jan 2009

Original Author: EF


All content © 1992-2010 Schneider Electric

Legacy KB System (APS) Data: RESL201154 V1.0, Originally authored by KBAdPM on 01/27/2010, Last Edited by KBAdPM on 01/27/2010
Related ranges: Sepam series 80, Sepam series 40, Sepam series 20
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