Connect-Tek Transa PRO 17 Manual de Instruções Página 37
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33
3–11 Heater Break Alarm
A current transformer (Part No. TEC99999) should be installed
to detect the heater current if a heater break alarm is required.
The CT signal is sent to input 2, and the PV2 will indicate the
heater current in 0.1amp resolution. The range of the current
transformer is 0 to 50.0amp. For more detailed descriptions
about heater current monitoring, please see section 3-24.
Example:
A furnace uses two 2KW heaters connected in parallel to warm
up the process. The line voltage is 220V and the rating current
for each heater is 9.09A. If we want to detect any one heater
break, set A1SP=13.0A, A1HY=0.1, A1FN=PV2.L,
A1MD=NORM, then:
3–12 Loop Break Alarm
A1FN selects LB if alarm
1 is required to act as a
loop break alarm.
Similarly, if alarm 2 is
required to act as a loop
break alarm, then set
OUT2 to AL2 and A1FN
to LB. TIME, A1SP,
A1DV, and A1HY are hid-
den if alarm 1 is config-
ured as a loop break
alarm. Similarly, TIME, A2SP, A2DV, and A2HY are hidden if
alarm 2 is configured as a loop break alarm. One of four kinds of
alarm modes can be selected for alarm 1 and alarm 2. These are:
normal alarm, latching alarm, holding alarm and latching/hold-
ing alarm. However, the holding mode and latching/holding
mode are not recommended for loop break alarm since loop
break alarm will not perform the holding function even if it is set
for holding or latching/holding mode. See section 3-8 for
descriptions of these alarm modes.
Loop break conditions are detected during a time interval of
2TI1 (double the integral time, but 120 seconds maximum).
Hence the loop break alarm doesn’t respond as quickly as it
occurs. If the process value doesn’t increase (or decrease) while
the control variable MV1 has reached its maximum (or mini-
mum) value within the detecting time interval, a loop break
alarm (if configured) will be activated.
Loop break alarm (if configured) occurs when any following
conditions happen:
1. Input sensor is disconnected (or broken).
2. Input sensor is shorted.
3. Input sensor is defective.
4. Input sensor is installed outside (isolated from) the process.
5. Controller fails (A-D converter damaged).
6. Heater (or generally, chiller, valve, pump, motor etc.) breaks
or fails or is uninstalled.
7. Switching device (used to drive heater) is open or shorted.
Heater break alarm 1
Setup: IN2=CT
A1FN=PV2.L
A1MD=NORM
A1HY=0.1
Adjust: A1SP
Trigger level: A1SP±A1HY
Heater break alarm 2
Setup: IN2=CT
A2FN=PV2.L
A2MD=NORM
A2HY=0.1
Adjust: A2SP
Trigger level: A2SP±A2HY
Limitations:
1. Linear output can’t use
heater break alarm.
2. CYC1 should use 1 second
or longer to detect heater
current reliably.
Loop break alarm 1
Setup: A1FN = LB
A1MD = NORM, LTCH
Loop break alarm 2
Setup: OUT2 = AL2
A2FN = LB
A2MD = NORM, LTCH
- Instruction Manual 1
- TEC-9300 1
- Self-Tune Fuzzy / PID Process 1
- Temperature Controller 1
- Chapter 1 Overview 5
- Related Products 6
- 1–2 Ordering Code 6
- Figure 1. Access Hole 7
- Overview 7
- Table 1.1 DIP Switch 7
- Configuration 7
- 1–4 Keys and Displays 8
- 1–6 System Modes 11
- 1–7 Parameter Description 12
- Chapter 2 Installation 19
- 2–6 Thermocouple Input Wiring 20
- 2–4 Power Wiring 20
- 2–7 RTD Input Wiring 21
- 2–8 Linear DC Input Wiring 21
- 2–10 Event Input wiring 23
- 2–11 Output 1 Wiring 24
- 2–12 Output 2 Wiring 25
- Figure 2.19 RS-232 Wiring 28
- 3–1 Input 1 29
- 3–2 OUT1 and OUT2 Types 30
- 3–3 Configuring User Menu 30
- 3–4 Heat Only Control 30
- 3–5 Cool Only Control 31
- 3–6 Heat-Cool Control 32
- 3–7 Dwell Timer 33
- 3–8 Process Alarms 34
- 3–9 Deviation Alarm 35
- 3–10 Deviation Band Alarm 36
- 3–11 Heater Break Alarm 37
- 3–12 Loop Break Alarm 37
- 3–13 Sensor Break Alarm 38
- 3–14 SP1 Range 38
- 3–15 PV1 Shift 38
- 3–16 Failure Transfer 39
- 3–17 Bumpless Transfer 40
- 3–18 Self tuning 40
- Self-tune Menu 40
- 3–19 Auto tuning 41
- 3–20 Manual Tuning 42
- 3–21 Signal Conditioner 43
- DC Power Supply 43
- 3–22 Manual Control 43
- 3–23 Display Mode 44
- 3–25 Reload Default Values 44
- 4–1 Event Input 45
- 4–2 Second Set Point 45
- 4–3 Second PID Set 46
- 4–4 Ramp and Dwell 46
- 4–5 Remote Set Point 47
- 4–6 Differential Control 47
- 4–7 Output Power Limits 48
- 4–8 Data Communication 48
- 4–9 Analog Retransmission 49
- 4–10 Digital Filter 49
- 4–11 Sleep Mode 49
- 4–12 Pump Control 50
- 4–13 Remote Lockout 50
- Chapter 5 Applications 51
- 5–3 Heat Only Control 52
- 5–5 Heat-Cool Control 53
- 5–4 Cool Only Control 53
- 5–6 Ramp and Dwell 54
- 5–7 Remote Set 55
- 5–8 Differential Control 55
- 5–9 Dual Set Point/PID 56
- 5–10 RS-485 57
- 5–11 RS-232 58
- 5–12 Retransmit 58
- Chapter 6 Calibration 59
- Troubleshooting procedures: 61
- Chapter 8 Specifications 65
- PID: Fuzzy logic modified 66
- 9-1 Functions Supported 67
- 9-2 Exception Responses 68
- 9-3 Parameter Table 69
- P= 100.0 80
- 9-3 Communication Examples 80
- A–1 Menu Existence Conditions 81
- A–2 Factory Menu Description 84
- A–3 Glossary 85
- A–4 Memo 89
- A–5 Warranty 91
- TEMPCO’s Visionary Solutions 92
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