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3BSERIAL DATA FRAMES
0BMODBUS RTU PROTOCOL
Then it will be necessary to revise and modify the tables of parameters. Consider the
implications of changes in these tables for the other protocols in use, because the table is
unique and not particular to each serial port.
5.3. SERIAL DATA FRAMES
Serial data frames are configurable. The options included are:
8 data bits, 1 stop bit, even parity (11 bits frame)
8 data bits, 1 stop bit, odd parity (11 bits frame)
8 data bits and 2 stop bits, without parity (11 bits frame)
8 data bits and 2 stop bits, without parity (10 bits frame)
The first three formats are widely used in MODBUS applications, being the first the most
widespread. Even though the MODBUS documentation does not include the last option
available, it is considered that it can be useful if it is used with a modem to communicate
with the smART P500, as the 10 bits frames are a standard in telephone modem devices.
Each data byte is preceded by a starting byte. The least significant bit is always sent and
received first.
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...