Schneider Electric (EM3502,EM3550) logging. MODBUS registers map.

This data is being extracted with the help of the Advanced Serial Data Logger (MODBUS RTU,ASCII) or Advanced TCP/IP Data Logger (MODBUS TCP) software only. It may not applicable for other software titles.

MODBUS offsetDescriptionUnitsData type
2Total instantaneous real power (3 phase total)kWword
3Total instantaneous reactive power (3 phase total)kVARword
4Total instantaneous apparent power (3 phase total)kVAword
5Total power factor (total kw / total kva)Ratioword
6Voltage, L l, average of 3 phasesVoltword
7Voltage, L n, average of 3 phasesVoltword
8Current, average of 3 phasesAmpword
9Real power, phase AkWword
10Real power, phase BkWword
11Real power, phase CkWword
12Power factor, phase ARatioword
13Power factor, phase BRatioword
14Power factor, phase CRatioword
15Voltage, phase A BVoltword
16Voltage, phase B CVoltword
17Voltage, phase A CVoltword
18Voltage, phase A NVoltword
19Voltage, phase B NVoltword
20Voltage, phase C NVoltword
21Current, instantaneous, phase AAmpword
22Current, instantaneous, phase BAmpword
23Current, instantaneous, phase CAmpword
25Frequency (derived from phase a)Hzword
26Apparent energy consumption (msr)KVAhdword
28Reactive energy consumption (msr)KVARhdword
30Apparent power, phase AkVAword
31Apparent power, phase BkVAword
32Apparent power, phase CkVAword
33Reactive power, phase AkVARword
34Reactive power, phase BkVARword
35Reactive power, phase CkVARword
36Total real power present demandkWword
37Total reactive power present demandkVARword
38Total apparent power present demandkVAword
39Total real power max. demandkWword
40Total reactive power max. demandkVARword
41Total apparent power max. demandkVAword
42Pulse counter 1 (real energy) dword
44Pulse counter 2 (reactive energy) dword
46Real energy consumption phase AkWhdword
48Real energy consumption phase BkWhdword
50Real energy consumption phase CkWhdword
129Single phase: A + N word
130Ct ratio primaryAmpsword
131Ct ratio secondary interface (1 or 1/3 v, may not be user configurable) word
132Pt ratio: the meter scales this value by 100 (i.e. entering 200 yields a potential transformer ratio of 2:1). the default is 100 (1.00:1), which is with no pt attached. set this value before setting the system voltage (below) word
133System voltage: this voltage is line to line, except for system type 10 which is line to neutral. the meter uses this value to calculate the full scale power for the analog outputs and pulse configuration (below), and as full scale for phase loss (register 142). the meter will refuse voltages that are outside the range of 82 660 volts when divided by the pt ratio (above) word
134Theoretical maximum system power: this read only value is the theoretical maximum power the meter can expect to see on a service. this value is 100% of scale on the analog output (0 5 vdc or 4 20 ma), if equipped. the meter recalculates this value if the user changes the ct size, system type, or system voltage. this integer value has the same scale as other integer power registers (see register 140 for power scaling)kWword
136Display units: 0 = iec (u, v, p, q, s), 1 = ieee (default: vll, vln, w, var, va) word
137Scale factors note: these registers contain a signed integer that scales the corresponding integer registers. floating point registers are not scaled. scaling is recalculated when the meter configuration is changed smallint
141Phase loss voltage threshold in percent of system voltage (register 134). default is 10 (%). any phase (as configured in register 130) that drops below this threshold triggers a phase loss alert, i.e. if the system voltage is set to 480 V L l, the L N voltage for each phase should be 277 v. when the threshold is set to 10%, if any phase drops more than 10% below 277 v, (less than 249 v), or if any L L voltage drops more than 10% below 480 V (less than 432 v) the corresponding phase loss alarm bit in register 146 will be true%word
142Phase loss imbalance threshold in percent. default is 25% phase to phase difference. for a 3 phase Y (3 + n) system type (40 in register 130), both line to neutral and line to line voltages are tested. in a 3 phase system type (31 in register 130), only line to line voltages are examined. in a single split phase (2 + n) system type (12 in register 130), just the line to neutral voltage are compared%word
143Wh (and varh, if equipped with fds) energy per pulse output contact closure. if the meter cannot find a pulse duration that will keep up with the max. system power (register 135), it will reject the new value. try a larger valueWhword
144Pulse contact closure duration in msec. read only. set to the slowest duration that will keep up with the theoretical max. system power (register 135). the open time the closure time, so the max. pulse rate (pulses per sec) is the inverse of double the pulse timemsword
146Count of energy accumulator resets word
148Number of sub intervals per demand interval. sets the number of sub intervals that make a single demand interval. for block demand, set this to 1 word
149Sub interval length in seconds. for sync to comms, set this to 0 and use the reset register (129) to externally restart the sub intervalSecondsword
151Power up counter word
256Real energy consumption (clear via reset register)kWhsingle
258Real energy consumption (clear via reset register)kWhsingle
260Total instantaneous real powerkWsingle
262Total instantaneous reactive powerkVARsingle
264Total instantaneous apparent powerkVAsingle
266Total power factor (total kw / total kva)Ratiosingle
268Voltage, L l, average of 3 phasesVoltsingle
270Voltage, L n, average of 3 phasesVoltsingle
272Current, average of 3 phasesAmpsingle
274Real power, phase AkWsingle
276Real power, phase BkWsingle
278Real power, phase CkWsingle
280Power factor, phase ARatiosingle
282Power factor, phase BRatiosingle
284Power factor, phase CRatiosingle
286Voltage, phase A BVoltsingle
288Voltage, phase B CVoltsingle
290Voltage, phase A CVoltsingle
292Voltage, phase A NVoltsingle
294Voltage, phase B NVoltsingle
296Voltage, phase C NVoltsingle
298Current, instantaneous, phase AAmpsingle
300Current, instantaneous, phase BAmpsingle
302Current, instantaneous, phase CAmpsingle
306Frequency (derived from phase a)Hzsingle
308Apparent energy consumptionkVAhsingle
310Reactive energy consumptionkVARhsingle
312Apparent power, phase AkVAsingle
314Apparent power, phase BkVAsingle
316Apparent power, phase CkVAsingle
318Reactive power, phase AkVARsingle
320Reactive power, phase BkVARsingle
322Reactive power, phase CkVARsingle
324Total real power present demandkWsingle
326Total reactive power present demandkVARsingle
328Total apparent power present demandkVAsingle
330Total real power max demandkWsingle
332Total reactive power max demandkVARsingle
334Total apparent power max demandkVAsingle
336Pulse counter 1 (real energy) single
340Real energy consumption, phase AkWhsingle
342Real energy consumption, phase BkWhsingle
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