GE Industrial Solutions ASTAT XT User Manual
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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