Basler Electric DECS-250N - Manual (Page 12)

x 9440500990 Rev D
Contents DECS-250N
Daylight Saving Time Adjustments ........................................................................................................ 183
Network Time Protocol (NTP) ............................................................................................................... 183
NTP Settings ...................................................................................................................................... 183
IRIG ....................................................................................................................................................... 183
Testing ...................................................................................................................................................... 187
Real-Time Metering Analysis ................................................................................................................ 187
Graph Parameters ............................................................................................................................. 188
Frequency Response ............................................................................................................................ 188
Test Mode .......................................................................................................................................... 188
Bode Plotting ...................................................................................................................................... 189
Transfer Function ............................................................................................................................... 189
Frequency Response ......................................................................................................................... 190
Time Response ..................................................................................................................................... 190
Signal Input ........................................................................................................................................ 191
Test Signal Characteristics ................................................................................................................ 191
Step Response Analysis........................................................................................................................ 192
AVR, FCR, and FVR Tabs ................................................................................................................. 192
Var and PF Tabs ................................................................................................................................ 193
Analysis Options .................................................................................................................................... 193
Layout Tab ......................................................................................................................................... 193
Graph Display Tab ............................................................................................................................. 194
CAN Communication .............................................................................................................................. 195
Introduction ............................................................................................................................................ 195
CAN Parameters ................................................................................................................................... 195
Diagnostic Trouble Codes (DTCs) ..................................................................................................... 197
Modbus
™ Communication ...................................................................................................................... 199
Introduction ............................................................................................................................................ 199
Message Structure ............................................................................................................................. 199
Modbus Modes of Operation ................................................................................................................. 200
Modbus
™ Over Serial Line ................................................................................................................. 200
Modbus on TCP/IP............................................................................................................................. 201
Error Handling and Exception Responses ......................................................................................... 202
DECS-250N Modbus
™ via Ethernet .................................................................................................. 203
Detailed Message Query and Response for RTU Transmission Mode ................................................ 203
Read Holding Registers ..................................................................................................................... 203
Return Query Data ............................................................................................................................. 203
Restart Communications Option ........................................................................................................ 204
Listen Only Mode ............................................................................................................................... 204
Preset Multiple Registers ................................................................................................................... 204
Preset Single Register ....................................................................................................................... 205
Data Formats ......................................................................................................................................... 206
Floating Point Data Format (Float) .................................................................................................... 206
Long Integer Data Format (Uint32) .................................................................................................... 207
Integer Data Format (Uint16) or Bit-Mapped Variables in Uint16 Format ......................................... 207
Short Integer Data Format/Byte Character Data Format (Uint8) ....................................................... 207
String Data Format (String) ................................................................................................................ 207
CRC Error Check ............................................................................................................................... 208
Secure DECS-250N Login via Modbus ................................................................................................. 208
Modbus Parameters .............................................................................................................................. 208
General .............................................................................................................................................. 208
Security .............................................................................................................................................. 209
Binary Points ...................................................................................................................................... 209
Metering ............................................................................................................................................. 218
Limiters .............................................................................................................................................. 223
Setpoints ............................................................................................................................................ 225
Global Settings ................................................................................................................................... 227
Relay Settings .................................................................................................................................... 228