Table of Contents
Advertisement
E.3 IEC 60870-5-103
APPENDIX E
Primary messages containing not implemented function codes are acknowledged with short messages and will not be
processed. Non-plausible primary messages involving function codes 0-15 will be answered by means of function code
15 in a short message. The FCB bit will be processed alternately.
As long as the protection equipment is not able to process a further command, the DFC bit is set to "1" to prevent loss of
information in the control direction. This state may only be maintained for a maximum of 15 s. During this time, no further
command shall be transmitted by the control system. Such messages are answered by the protection equipment by
means of a short message with function code 1 and are not processed. This leads to a loss of information. The exception
to this is the broadcast command.
E
E-6
MIFII Digital Feeder Relay
GEK-106237P
Advertisement
Table of Contents
