H134-E1-01A E5_N UsersManual (986777), страница 13
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The default is 2 (Upper-limit alarm).52Section 3-9Alarm Outputs3-9-2Alarm Valuesal1lAlarm lowerlimit valueal2l• To set the alarm value upper and lower limits for deviation, set the upperand lower limits in each of the “alarm 1 to 3 upper limit,” and “alarm 1 to 3lower limit” parameters in the operation level.al3lal1h• Alarm values are indicated by “X” in the table on the previous page. Whenthe upper and lower limits are set independently, “H” is displayed forupper limit values, and “L” is displayed for lower limit values.Alarm upperlimit valueal2hal3hal-1Alarm valueal-2al-3Operating ProcedureThis procedure sets alarm 1 as an upper-limit alarm.
The related parametersand settings are shown below. The alarm is output when the set pointexceeds 10°C. (In this example, the temperature unit is °C.)Alarm 1 type = 2 (Upper-limit alarm)Alarm value 1= 10Initial Setting Level1. Press the O key for at least three seconds to move from the operationlevel to the initial setting level.in-tInput typealt1Alarm 1 type2.
Select the “alarm 1 type” parameter by pressing the M key. Confirm thatthe set value is 2. The default value is 2 (Upper-limit alarm).PV/SP3. To return to the operation level, press the O key for at least one second.Alarm value 14. Select the “alarm value 1” parameter by pressing the M key.52C25100Cal-10Cal-15. Use the U key to set the parameter to 10.1053Section 3-10Using HBA and HS Alarms3-10 Using HBA and HS Alarms3-10-1 HBA and HS Alarm Operations• Heater burnout detection is executed by measuring heater current whilethe control output for heating is ON, and HS detection is executed bymeasuring heater current while it is OFF.
For details, refer to the followingtable.(Heater burnout detection and HS detection cannot be used with the control output for cooling.)Heating control output statusControl output(heating)Power to heaterHBA outputHS alarm outputOperation indicatorONLitYes (Normal) (See note 1.)No (Heater burnout)OFFON-----OFFNot litYes (HS alarm)No (Normal) (See note 2.)-----ONOFFTon*3Toff*4ONControl output (heating)OFFNote(1) In the above diagram, power is considered to be ON (normal) if the heatercurrent is greater than the heater burnout detection current during the Toninterval. If the heater is burned out, the measured current decreases andfalls below the heater burnout detection value.
The output is then activated as the heater burnout alarm.(2) In the above diagram, power is considered to be OFF (normal) if the leakage current is less than the HS alarm current during the Toff interval. Ifthe SSR output is short-circuited, the measured current increases beyond the HS alarm value. The output is then activated as the HS alarm.(3) Heater burnouts are not detected if the control output (heating) ON time(Ton) is 190 ms or less.(4) HS are not detected if the control output (heating) OFF time (Toff) is190 ms or less.• For models with HBA and HS alarms, an OR output is establishedbetween the ALM 1 function and the HBA/HS alarm.
If the ALM1 functionis to be used for HBA and HS alarms only, set 0 as the ALM1 type and donot use ALM1.• Turn the heater power ON simultaneously or before turning ON the E5@Npower. If the heater power is turned ON after turning ON the E5AN power,the HBA will be activated.• Control is continued even when the HBA or HS alarm is active.• The rated current value may sometimes differ slightly from the actual current flowing to the heater.Use the “heater current 1 value monitor,” “heater current 2 value monitor,”“leakage current 1 monitor,” and “leakage current 2 monitor” parametersto check the actual current being used.54Section 3-10Using HBA and HS Alarms• If there is little difference between the current in normal and abnormalstates, detection may become unstable. To stabilize detection, set a current value difference of at least 1.0 A for heaters of less than 10.0 A, andat least 2.5 A for heaters of 10.0 A or more.
If the heater current is too low,loop the load line several times through a CT, as shown in the diagrambelow. Looping it through twice will double the detection current.Load lineCT3-10-2 Installing Current Transformers (CT)• This function can be used with E5@N models that have the HBA and HSalarm.For the E5CN, connect the CT in advance to terminals 14 and 15 (CT1),or 13 and 15 (CT2). For the E5AN/EN, connect the CT in advance to terminals 14 and 15 (CT1) or 15 and 19 (CT2). Then pass the heater powerline through the CT's hole.For specifications, models and dimensions of current transformers thatcan be used with this Controller, see Appendix A Current Transformer(CT) page 201.Single-phase HeatersFor single-phase heaters, install the CT in the position shown in the followingdiagram.LoadAC lineLoad (such as a heater)CTProductTo CT input1.
Delta connecting lines: Refer to the following diagram for CT installationpositions.NoteHeater voltage fluctuations are not considered here, so be take thatinto account when setting the detection current.Loadad1,2,3...When a 3-phase power supply is used, regardless of the types of connectinglines, two current transformers (CTs) are required to detect heater burnoutand HS.LoThree-phase Heaters(E5@N-@@HH@ 3-phaseHeater Detection Models)AC lineLoad (such as a heater)LoadProductTo CT inputAC lineCTProductTo CT input2. Star connecting lines: Refer to the following diagram for CT installation positions.NoteHeater voltage fluctuations are not considered here, so be take thatinto account when setting the detection current.55Section 3-10LoadUsing HBA and HS AlarmsLoad (such as a heater)LoadadLoAC lineProductTo CT inputCTCTProductTo CT input3.
V connecting lines: Refer to the following diagram for CT installation positions.Heater voltage fluctuations are not considered here, so be take thatinto account when setting the detection current.CTadProductTo CT inputLoNoteLoad (such as a heater)adLoAC lineCTProductTo CT input3-10-3 Calculating Detection Current Values• Calculate the set value using the following equation:Heater Burnout Detection 1/2 set value = Normal current value + Burnout current value2HS Alarm 1/2 set value = Leakage current value (output OFF) + HS current value2• To set the current for heater burnout when two or more heaters are connected through the CT, use the value from when the heater with the smallest current burns out. If all of the heaters have the same current, use thevalue from when any one of them burns out.• Make sure that the following conditions are satisfied:Heater with a current of less than 10.0 A:(Current value at normal operation) − (Current value at heater burnout) ≥1AWhen the difference is less than 1 A, detection is unstable.Heater with a current of 10.0 A or more:(Current value at normal operation) − (Current value at heater burnout) ≥2.5 AWhen the difference is less than 2.5 A, detection is unstable.• The setting range is 0.1 to 49.9 A.
Heater burnout and HS are notdetected when the set value is 0.0 or 50.0.When the set value is 0.0, the heater burnout alarm is always OFF, andthe HS alarm is always ON.When the set value is 50.0, the heater burnout alarm is always ON, andthe HS alarm is always OFF.56Section 3-10Using HBA and HS Alarms• Set the total current value for normal heater operation to 50 A or less.When a current value of 55.0 A is exceeded, ffff is displayed in the“heater current 1 (and 2) value monitor” and “leakage current 1 (and 2)monitor” parameters.3-10-4 Application ExamplesSingle-phase HeatersExample: Using a 200-VAC, 1-kW HeaterBurnoutNormalAC line5 A→AC line200 V200 VLoad←5 ALoad Load (such as a heater)Burnout0ACTCTProductTo CT inputProductTo CT inputThe heater power supply provides 5 A when the current is normal, and 0 Awhen there is a burnout, so the heater burnout detection current is calculatedas follows:Heater burnout detection current ==(Normal current) + (Heater burnout current)25+0= 2.5 [A]2Example: Using Three 200-VAC, 1-kW HeatersBurnoutNormal15 A→10 A200 VLoad LoadLoad←15 AProductTo CT input200 VLoad Load10 ACTProductTo CT inputLoadBurnoutCTThe heater power supply provides 15 A when the current is normal, and 10 Awhen there is a burnout, so the heater burnout detection current is calculatedas follows:Heater burnout detection current ==(Normal current) + (Heater burnout current)215 + 10= 12.5 [A]257Section 3-10Using HBA and HS AlarmsThree-phase HeatersDelta Connecting LinesExample: Using Three 200-VAC, 2-kW HeatersNormal17.3 A→17.3 A→Load200 V200 VadLoadLo200 VProduct17.3 A→ To CT inputCTProductTo CT inputThe current when each phase is normal is 17.3 A (≈ √3 × 10 A).BurnoutBurnoutBurnout10 A→15 A→ProductTo CT inputad17.3 A→200 V200 VCTLoLoCTProductTo CT inputadLoadLo200 V200 Vad15 A→200 VLoadBurnout200 VLoadCTProductTo CT input10 A→CTProductTo CT inputCurrent when there is a burnout = 10 A × √3 ×(√3/2) = 15 ACurrent when there is a burnout = 10 A × √3 ×(1/√3) = 10 AThe heater burnout current when there is a burnout at the load line is as follows:(Heater burnout detection current) = (17.3 + 15) / 2 ≈ 16.1 [A]The heater burnout current when there is a burnout at the load is as follows:(Heater burnout detection current) = (17.3 + 10) / 2 ≈ 13.65 [A]To enable detection in either case, use 16.1 A as the heater burnout detectioncurrent.58Section 3-10Using HBA and HS AlarmsStar Connecting LinesExample: Using Three 200-VAC, 2-kW HeatersNormalLoad5.8 A→200 VLoad (such as a heater)200 VLodadaLo5.8 A→CT200 V ProductTo CT input5.8 A→CTProductTo CT inputThe current when each phase is normal is 5.8 A (≈ 10 A × (1 /√3)).BurnoutBurnoutLoad (such as a heater)200 VLoadLoad (such as a heater)Load5 A→200 VLod200 VadaLo5 A→5 A→CT200 V ProductTo CT inputTo CT inputCTProductTo CT inputadaLo5 A→CT200 V ProductLod200 VBurnoutCTProductTo CT inputCurrent when there is a burnout = 10 A × (1/√3)× (√3/2) = 5 ACurrent when there is a burnout = 10 A × (1/√3)× (√3/2) = 5 AThe heater burnout detection current for this connecting line is 5.4 A (= (5.8 +5) / 2).59Section 3-10Using HBA and HS AlarmsV Connecting LinesExample: Using Two 200-VAC, 2-kW HeatersNormal10 A→CTadProductTo CT inputLo200 V17.3 A→200 VadLo200 V10 ACTProductTo CT inputBurnout10 A→5 A→200 V200 V10 A→Burnout5 A→CTadLo200 VadLo200 VProductTo CT inputLo200 VLoProductTo CT inputadCTadCT200 VCTProductTo CT inputProductTo CT inputCurrent when there is a burnout = 10 A × (1/2)=5ACurrent when there is a burnout = 0 AThe heater burnout current when there is a burnout at the common is as follows:Heater burnout detection current = (10 + 5) / 2 ≈ 7.5 [A]The heater burnout current when there is a burnout at the load is as follows:Heater burnout detection current = (10 + 0) / 2 ≈ 5 [A]To enable detection in either case, use 7.5 A as the heater burnout detectioncurrent.60Section 3-10Using HBA and HS Alarms3-10-5 Settings (HBA)To activate the heater burnout alarm, set the “heater burnout detection”parameter to ON in the advanced function setting level and set the “heaterburnout detection 1” and “heater burnout detection 2” parameters in theadjustment level.Operating ProcedureThis procedure sets the “heater burnout detection 1” parameter to 2.5.■Moving to the Advanced Function Setting LevelThe “heater burnout detection” parameter setting is already ON by default, soset the “heater burnout detection 1” parameter.Operation LevelC251.
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