Basler-electric DECS-400 User Manual Page 236
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224 9369700990 Rev R
Registers
Data Description
Access
Data
Format
42608
Defined
42609
Loop gain for var limiter
RW
FLOAT
42611
Integral gain for var limiter
RW
FLOAT
42613 to
42675
Reserved for future C8 use
Not
Defined
42676
Secondary Stability Range (Gain Table Index)
RW
FLOAT
42678
Secondary AVR - Proportional Gain Kp
RW
FLOAT
42680
Secondary AVR - Integral Gain Ki
RW
FLOAT
42682
Secondary AVR - Derivative Gain Kd
RW
FLOAT
42684
Secondary AVR - Loop Gain Kg
RW
FLOAT
42686
Secondary AVR - Derivative Time Constant Td
RW
FLOAT
42688 to
42999
Reserved for future C8 use
R
Not
Defined
Holding Registers for Protection Function Parameters
Table 43. Information Category C9—Protection Function Parameters
Registers
Data Description
Access
Data
Format
43001
Primary Exciter Field Overvoltage
RW
UINT16
43002
Primary Exciter Field Overcurrent
RW
UINT16
43003
Primary Generator Undervoltage
RW
UINT16
43004
Primary Generator Overvoltage
RW
UINT16
43005
Primary Field Over Temperature
RW
UINT16
43006
Primary Loss of Field
RW
UINT16
43007
Primary Loss of Field Isolation Transducer
RW
UINT16
43008
Primary Power Low
RW
UINT16
43009
24 Volts/Hz
RW
UINT16
43010 to
43012
Not used
R
Not
Defined
43013
Inverse Time Curve Exponent
RW
UINT16
43014 to
43024
Not used
R
Not
Defined
43025
Active Protection Setting Group
R
UINT16
43026
Primary Field Overvoltage Level
RW
FLOAT
43028
Primary Field Overcurrent Level
RW
FLOAT
43030
Primary Generator Undervoltage Level
RW
FLOAT
43032
Primary Generator Overvoltage Level
RW
FLOAT
43034
Primary Field Overvoltage Time Delay
RW
FLOAT
43036
Primary Field Overcurrent Time Dial
RW
FLOAT
43038
Primary Generator Undervoltage Time Delay
RW
FLOAT
43040
Primary Generator Overvoltage Time Delay
RW
FLOAT
43042
Primary Field Over Temperature Level
RW
FLOAT
43044
Primary Field Over Temperature Time Delay
RW
FLOAT
43046
Primary Loss of Field Level
RW
FLOAT
43048
Primary Loss of Field Time Delay
RW
FLOAT
43050
Primary Loss of Field Isolation Transducer Level
R
FLOAT
43052
Primary Loss of Field Isolation Transducer Time Delay
RW
FLOAT
43054
Primary Power Low Level
R
FLOAT
43056
Primary Power Low Time Delay
R
FLOAT
43058 to
43124
Reserved for future C9 use
R
Not
Defined
43126
Secondary Exciter Field Overvoltage
R
UINT16
43127
Secondary Exciter Field Overcurrent
R
UINT16
Modbus™ Communication DECS-400
- INSTRUCTION MANUAL 1
- Preface 3
- 9369700990 Rev R iii 5
- DECS-400 Preface 5
- Contents 7
- General Information 13
- Generator Voltage Regulation 14
- Control Output 14
- Stability 14
- Overexcitation Limiters 16
- Minimum Excitation Limiter 16
- Stator Current Limiter 16
- Reactive Power Limiter 17
- Protective Functions 17
- Programmable Logic 17
- Model and Style Number 19
- Human-Machine Interface 21
- Menu System 22
- Editing Settings 32
- Password Protection 33
- Metering Screen 34
- Setpoint 35
- Percent of Range 35
- Alarms Message 36
- Operating Mode 37
- Functional Description 39
- Front Panel Keyboard 41
- Contact Input Circuits 41
- Digital Signal Processor 42
- Microprocessor 42
- IRIG Port 42
- Memory Circuits 43
- Digital to Analog Converter 43
- Control Output Circuits 43
- Meter Driver Circuits 43
- Relay Output Contacts 43
- Front Panel LEDs 44
- Front Panel LCD 44
- RS-232 Communication Port 44
- RS-485 Communication Ports 44
- Startup Functions 45
- Control Modes 46
- Field Overvoltage 50
- Generator Undervoltage 50
- Generator Overvoltage 50
- Loss of Sensing Voltage 50
- Power Supply Low 51
- Loss of Field (40Q) 51
- Field Overtemperature 52
- Volts per Hertz (24) 52
- MEASURED 53
- Exciter Diode Monitor (EDM) 54
- Limiter Functions 55
- Overexcitation Limiter 56
- TIME IN SECONDS 57
- Underexcitation Limiter 58
- (0.49 x kW 59
- 1.0) x kvar_level 59
- Underfrequency Limiter 59
- GENERATOR VOLTS 60
- Var Limiter 61
- Limiter Scaling 61
- Droop Compensation 61
- Reactive Differential 61
- Line Drop Compensation 61
- Autotracking 62
- Data Recording and Reporting 62
- Data Logging 63
- Power System Stabilizer 64
- PSS Theory of Operation 65
- Figure 19. Speed Signal 66
- Stabilizing 67
- Compensation 67
- SSW 5SSW 4 67
- P0026-21 68
- 12-09-04 68
- Figure 26. Output Stage 69
- BESTCOMS™ Software 71
- Communication 73
- Modem Communication 75
- System Configuration 75
- Settings 83
- Gain Settings 89
- Figure 44. PID Calculator 90
- Protection 100
- Metering 110
- Data Log 114
- 9.22936 ×= 121
- Analysis 123
- Caution 126
- 9369700990 Rev R 115 127
- DECS-400 BESTCOMS™ Software 127
- Installation 133
- 122 9369700990 Rev R 134
- Installation DECS-400 134
- 9369700990 Rev R 123 135
- DECS-400 Installation 135
- Connections 137
- 126 9369700990 Rev R 138
- Table 13. IRIG Terminals 141
- Cross-Current Compensation 144
- Typical Interconnections 145
- 134 9369700990 Rev R 146
- 9369700990 Rev R 135 147
- Communication Connections 148
- P0026-01 149
- 10-01-04 149
- Commissioning 151
- Warning! 154
- Recommended PSS Testing 159
- Maintenance 161
- Backup Battery Replacement 164
- Upgrading DECS-400 Firmware 164
- Specifications 169
- Generator Current Sensing 170
- Field Voltage and Current 170
- Field Isolation Module 170
- Contact Inputs 170
- Control Outputs 171
- Metering Outputs 172
- Contact Outputs 172
- Communication Ports 172
- Regulation Accuracy 173
- Metering Accuracy 174
- Traverse Rates 174
- Setpoint Tracking 174
- Soft Start 175
- Sequence of Events Recording 175
- Data Logging (Oscillography) 175
- Trending 175
- Limiters 175
- Underexcitation 176
- Protection Functions 177
- Type Tests 178
- Agency Certifications 178
- Real-Time Clock Battery 178
- Environment 179
- Physical 179
- Logic Schemes 182
- 9369700990 Rev R 171 183
- DECS-400 Programmable Logic 183
- 172 9369700990 Rev R 184
- Programmable Logic DECS-400 184
- 9369700990 Rev R 173 185
- 174 9369700990 Rev R 186
- 9369700990 Rev R 175 187
- 176 9369700990 Rev R 188
- 9369700990 Rev R 177 189
- 178 9369700990 Rev R 190
- 9369700990 Rev R 179 191
- 180 9369700990 Rev R 192
- 9369700990 Rev R 183 195
- Logic Scheme Modification 196
- Logic Definitions 207
- Outputs 210
- 202 9369700990 Rev R 214
- Relay Output 1 through 6 214
- Modbus™ Communication 215
- Modbus Modes of Operation 216
- Serial Transmission Details 216
- Modbus™/TCP 218
- Preset Multiple Registers 219
- Response 220
- Data Formats 221
- Generic Types UI8 and I8 222
- Generic Types UI16 and I16 222
- Generic Types UI32 and I32 222
- CRC Error Check 223
- DECS-400 Register Tables 225
- 214 9369700990 Rev R 226
- 9369700990 Rev R 215 227
- 216 9369700990 Rev R 228
- 9369700990 Rev R 217 229
- 218 9369700990 Rev R 230
- 9369700990 Rev R 219 231
- 220 9369700990 Rev R 232
- 9369700990 Rev R 221 233
- 222 9369700990 Rev R 234
- 224 9369700990 Rev R 236
- 9369700990 Rev R 225 237
- 226 9369700990 Rev R 238
- 9369700990 Rev R 227 239
- 228 9369700990 Rev R 240
- 9369700990 Rev R 229 241
- Revision History 243
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