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7BPOINT MAP
0BMODBUS RTU PROTOCOL
5.7.6. EVENTS READING
The reading of events is done through a mechanism that is described in this section.
The mechanism allows the reading of events in groups of up to 31 events. Event means
any change in status in the configured digital inputs. Each event includes the state in
which the input was and the date and time at which the change happened. At one
moment, there can be any number of events waiting to be read. If there were more than
31, they will be presented in groups of 31 until the events that have not been read by the
master station are over.
To ensure that the master has read the events that are reported, there is a mechanism
by which the master tells the smART P500 that it has read the events allowing the relay
to report additional events, if any.
The number of events available to be read is found reading the point 1100. The number
read may be between 0 and 31. This point should be read alone. A reading of more than
one point from the index 1100 will fail and the smART P500 will indicate that the
exception 2 has occurred. Each reading of section 1100 causes that the smART P500 to
find the number of events available, again. It is not required then to perform a reading of
events immediately after reading the point 1100. Section 1100 can be read as many
times as needed and perform the event information reading when it is considered
appropriate (perhaps after the accumulation of 31 events).
Once the number of available events is known, they can be read from the point 1102 on.
This requires that the reading is always done from the point 1102. Moreover, the number
of points read must be a multiple of 4 (thus the events must be read completely). Finally,
the number of read events can not exceed the number of events available (the ones
events in the final reading of section 1100). However, it is possible to read a smaller
number of events than that specified in section 1100.
Each event is formed by the information contained in 4 points.
The first, with the lowest index, contains the number of the event in bits 6 to 0. 7
to 14 bits are always 0. Bit 15 indicates the status of the input after the change (1
or 0).
Summary of Contents for smART P500
Page 1: ...Instruction Manual Multifunction Protection Relay smART P500...
Page 23: ...2BTABLES INDEX THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY...
Page 39: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 9 Wye Wye Connection measured neutral...
Page 40: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 10 Wye Wye Connection sensitive neutral...
Page 41: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 11 Open Delta Connection measured neutral...
Page 42: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 12 Open Delta Connection sensitive neutral...
Page 511: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 6 Moderately ANSI curve...
Page 513: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 7 Very inverse ANSI curve...
Page 515: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 8 Extremely inverse ANSI curve...
Page 532: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 14 Recloser Curves 101 119...
Page 535: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 15 Recloser Curves 120 142...
Page 538: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 16 Recloser Curves 151 202...