Basler-electric DECS-400 User Manual Page 228
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216 9369700990 Rev R
Holding Registers for System Configuration
Table 37. Information Category C3—System Configuration
Registers
Data Description
Access
Data
Format
40401
Sensing Configuration
RW
UINT16
40402
Auxiliary Input Summing Mode
RW
UINT16
40403
Bridge Control Signal
RW
UINT16
40404
Generator Field Type
RW
UINT16
40405
Voltage Sensing H/W Gain Control
R
UINT16
40406
Auxiliary Input Type
RW
UINT16
40407
Temperature Mode
RW
UINT16
40408
Number of CT's
RW
UINT16
40409
Selected CT's
RW
UINT16
40410
Motor/Generator Mode
R
UINT16
40411
Auxiliary Input Function; 0=DECS, 1=PSS, 2=LIMITER, 3=METONLY
RW
UINT16
40412 to
40450
Reserved for future C3 use
R
Not
Defined
40451
Rated Generator Frequency
RW
FLOAT
40453
Generator PT Primary Voltage
RW
FLOAT
40455
Generator PT Secondary Voltage
RW
FLOAT
40457
Generator CT Primary Current
RW
FLOAT
40459
Generator CT Secondary Current
RW
FLOAT
40461
Field Current Shunt Rating
RW
FLOAT
40463
Field Voltage Isolation Module Input
RW
FLOAT
40465
Bus PT Primary Voltage
RW
FLOAT
40467
Bus PT Secondary Voltage
RW
FLOAT
40469
Maximum Field Flash Time
RW
FLOAT
40471
Field Flash Dropout Level
RW
FLOAT
40473
Generator Rated Voltage
RW
FLOAT
40475
Generator Rated kVA
RW
FLOAT
40477
Generator Rated Field Voltage
RW
FLOAT
40479
Generator Rated Field Current
RW
FLOAT
40481
Bus Voltage
RW
FLOAT
40483
Auxiliary Voltage Input Gain
RW
FLOAT
40485
Internal Tracking Time Delay
RW
FLOAT
40487
Internal Tracking Traverse Rate
RW
FLOAT
40489
Reserved
40491
Auxiliary Current Input Gain
RW
FLOAT
40493
External Tracking Time Delay
RW
FLOAT
40495
External Tracking Traverse Rate
RW
FLOAT
40497
Auxiliary Input Gain for FCR Mode
RW
FLOAT
40499
Auxiliary Input Gain for VAR Mode
RW
FLOAT
40501
Auxiliary Input Gain for PF Mode
RW
FLOAT
40503
Exciter Field Resistance
RW
FLOAT
40505
Ambient Temperature
RW
FLOAT
40507
Brush Voltage Drop
RW
FLOAT
40509
Generator Power Factor
RW
FLOAT
40511
Auxiliary Input Gain for FVR Mode
RW
FLOAT
40513 to
40599
Reserved for future C3 use
R
Not
Defined
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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