89 • Appendix A - MODBUS RTU Protocol
A.7. Actual Data (3X References & 4X References)
Actual data includes measured values such as voltage and current. It includes both logic and statistical information.
All parameters are word (two bytes) parameters. The protocol supports only reading of these parameters.
Parameter # is "1 based". The actual parameter address is 1 lower than parameter #. For example the address of
parameter #1 is 0 (30000).
The parameters have double mapping, at the following 3x & 4x references:
Note: Function 4 should be used to read 3x references and function 3 to read 4x references.
Parameter # (3x) # (4x) Comment
Logic Status 1 257 Logic status of ASTAT-XT. 1 indicates:
d15: ASTAT-XT Tripped.
d14: Motor Stopped.
d13: Motor in Soft Stop Process.
d12: Motor in Start Process.
d11: Motor is Running.
d10: Dual_Adjust On.
d9: Motor is running with Energy Save On.
d8: Motor is running at Slow Speed forward.
d7: Motor is running at Slow Speed reverse.
d6: Reserved
d5..d0: Reserved.
Motor Current 2 258 Current, % Im
Line Voltage 3 259 Line voltage, volts
Phase_Sequence 4 260 1: Correct Phase seq. 0 : Wrong Phase Seq.
Hardwired inputs 5 261 Discrete Hardwired control inputs:
d15..d8: Reserved.
d7: External fault.
d6: Reserved.
d5: Reserved.
d4: D.Adj / S.Spd / Rst (Programmable) Input.
d3: E.Save / Rvrs / Rst (Programmable) Input.
d2: Start Input.
d1: Soft Stop Input.
d0: Stop Input.
Dip_Switch 6 262
d15..d8: Reserved.
d7: Prevent Setting Lock - (right-most)
d6: Expanded Setting Ranges
d5: Language Selection.
d4: Language Selection.
d3: Reserved - Must be set to Off.
d2: Generator Starting - Set to Off.
d1: Reserved
d0: Min (OFF) / Max display pages- (left most)
Reserved 7..9 264..265
Frequency 10 266 Frequency [Hz]
Thermistor_Resistance 11 267 Thermistor resistance, tenth Kohm.
Reserved 12..16 268..272
Logic Status at Power Fail 17 273 Logic Status at Control Pwr Supply turn OFF.
Elapsed Run Time 18 274 Total Hours of Running Motor.
Number of Starts 19 275 Total Number Of Starts
Last_Start_Period 20 276 Duration of Last Start, Seconds.
Last_Start_Peak_I 21 277 Peak Current During Last Starting process
Reserved 22 278
Total_Trips 23 279 Total Number Of Trips
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