Sepam - HV/MV Protection and control units (ENG) - Trinet

Access to remote settings (cont’d)Reply frameThe reply sent back by the Sepam 2000 is the same as the remote reading replyframe. It fits into a zone containing a maximum of 125 words at the address D000h,and is composed of the effective settings of the function following a semantic check:D000hB15 B14 B13 B12 B11 B10 B09 B08 B07 B06 B05 B04 B03 B02 B01 B00function coderelay numbersettings…………(special field for each function)…………This zone is read by a Jbus «read n words» operation (code 3)at the address D000H.The length of the exchange may include:c the first word only (validity test),c the maximum size of the reply zone (125 words),c the usable size of the reply zone (determined by the function being addressed).However, reading must always begin at the first word in the address zone(any other address triggers an exception reply «incorrect address»).The first word in the reply zone (function code and relay number) has the samevalues as those described for the remote reading reply frame:c xxyy: withv function code xx different from 00 at FFh,v relay number yy different from FFh.The settings are available and validated. The word is a copy of the «request frame».The zone contents remain valid until the next request is made.c 0000h: no «request frame» has been formulated yet, as it is the case, in particular,when the Sepam 2000 is switched on.c FFFFh: the «request frame» has been processed, but the results in the«reply frame» are not yet available. It is necessary to repeat «reply frame» reading.The other words are not significant. This reply is also used when the Sepam 2000is in the process of setting locally (parameter setting mode).c xxFFh: with function code xx different from 00 and FFh. The function for whichthe remote reading request has been made is not valid. The function is not includedin that particular Sepam 2000, or remote reading of it is not authorize: refer to the listof functions which accommodate remote reading of settings (see Sepam «Meteringand protection functions» manual). The other words are not significant.c 00FFh:v the Sepam 2000 does not support the remote setting function,v the Sepam 2000 is in parameter setting mode (local setting in progress),v the remote setting function is inhibited (the status of the control logic K862 internalrelay coil is set to 1).Exception replyThis corresponds to the usual cases for Sepam 2000 Jbus communication.In particular, a type 04 reply is sent in the event of an internal Sepam 2000 fault.30 Jbus/Modbus communication