Eurotherm 3116 PID Installation Guide Page 94
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Engineering Handbook 3200 Series
92 Part No HA028651 Issue 10.0 Dec -10
15.5 Parameter Modbus Addresses
Parameter
Mnemonic
Parameter Name Modbus Address
Decimal
PV.IN PV (Temperature) Input Value (see also Modbus address 203 which allows writes over Modbus to this variable). 1
TG.SP Target Setpoint.
NB – do not write continuously changing values to this variable. The memory technology used in this
product has a limited (100,000) number of write cycles. If ramped setpoints are required, consider using the
internal ramp rate function or the remote comms setpoint (Modbus address 26 )in preference.
2
MAN.OP Manual Output Value 3
WRK.OP Working Output 4
WKG.SP Working Setpoint (Read Only) 5
PB Proportional Band 6
CTRL.A
Control Action
0 = Reverse Acting
1 = Direct Acting
7
Ti Integral Time
(0 = No Integral Action)
8
Td Derivative Time
(0 = No Derivative Action)
9
RNG.LO Input Range Low Limit 11
RNG.HI Input Range High Limit 12
A1.--- Alarm 1 Threshold 13
A2.--- Alarm 2 Threshold 14
SP.SEL Active Setpoint Select
0 = Setpoint 1
1 = Setpoint 2
15
D.BAND Channel 2 Deadband 16
CB.Lo Cutback Low 17
CB.HI Cutback High 18
R2G Relative Cool/Ch2 Gain 19
MTR.T Motor Travel Time 21
T.STAT Timer Status
0 = Reset
1 = Run
2 = Hold
3 = End
23
SP1 Setpoint 1
NB – do not write continuously changing values to this variable. The memory technology used in this
product has a limited (100,000) number of write cycles. If ramped setpoints are required, consider using the
internal ramp rate function or the remote comms setpoint (Modbus address 26 )in preference.
24
SP2 Setpoint 2
NB – do not write continuously changing values to this variable. The memory technology used in this
product has a limited (100,000) number of write cycles. If ramped setpoints are required, consider using the
internal ramp rate function or the remote comms setpoint (Modbus address 26 )in preference.
25
Rm.SP
Remote (comms) setpoint. If selected using the remote setpoint selection (address 276 below, may also be
controlled using the instrument HMI or a digital input) then this is used as a setpoint providing a value has been
received within a window of about 5 seconds. If no value is received then the controller falls back to the currently
selected setpoint (SP 1 or SP 2) with an error indication. The Remote Setpoint may have a local trim (SP Trim,
address 27) added to it to compensate for variations in temperature in a particular zone.
This parameter is not saved when the instrument is switched off. It may be written to continuously over
communications without risk of damage to the instrument non-volatile memory.
26
LOC.t Local Trim – added to the remote setpoint to compensate for local temperature variations in a control zone. 27
MR Manual Reset 28
OP.HI Output High Limit 30
OP.LO Output Low Limit 31
SAFE Safe Output Value for Sensor Break or other fault conditions. 34
SP.RAT Setpoint Rate Limit Value (0 = no rate limit) 35
P.Err Calculated Error (PV-SP) 39
A1.HYS Alarm 1 Hysteresis 47
A2.HYS Alarm 2 Hysteresis 68
A3.HYS Alarm 3 Hysteresis 69
- Engineering Handbook 1
- Contents 3
- Issue Status of this Manual 7
- 1.3 Dimensions 8
- 1.4 Step 1: Installation 9
- 1.5 Order Code 10
- 2. Step 2: Wiring 11
- 2.4 Wire Sizes 13
- 2.5 Precautions 13
- Local ground 16
- Diagram 17
- ☺ Helpful hints 18
- Pollution Degree 2 19
- 4. Switch On 20
- Subsequent Starts 21
- 4.4 Front Panel Layout 22
- buttons 23
- 5. Operator Level 2 24
- ☺ Press 27
- 5.4 Timer Operation 28
- 5.5 Dwell Timer 29
- 5.6 Delayed Timer 29
- 5.7 Soft Start Timer 30
- 5.8 Programmer 30
- SERVO MODE 31
- 6.1 Parameter Levels 33
- ☺ Press and hold 35
- 6.3 Navigation Diagram 36
- 6.4 Access Parameters 37
- 7. Controller Block Diagram 39
- 8.2 PV Offset 43
- 8.3 PV Input Scaling 43
- 9. Input/Output 44
- 1. fu n c 47
- 9.1.7 Output List 2 (OP-2) 48
- 9.1.8 Output List 3 (OP-3) 49
- 10. Setpoint Generator 53
- 11. Control 55
- 11.2 Control Parameters 57
- 11.2.2 Integral Term ‘TI’ 59
- 11.2.3 Derivative Term ‘TD’ 60
- 11.2.5 High and Low Cutback 61
- 11.2.6 Manual Reset 61
- 11.2.7 Control Action 61
- 11.2.8 Loop Break 61
- 11.2.9 Cooling Algorithm 61
- 11.3 Tuning 62
- 11.3.3 Automatic Tuning 64
- 11.3.4 To Start Autotune 64
- 11.3.8 Manual Tuning 68
- 12. Alarms 73
- 12.2.1 Example 1 76
- 12.2.2 Example 2 76
- 12.2.3 Example 3 76
- 12.3 Alarm Parameters 77
- 12.4 Diagnostic Alarms 79
- 13. Timer/Programmer 80
- 13.2 Programmer 82
- Rm p. 1 84
- Configure the Timer 86
- 15. Digital Communications 90
- ☺ EIA232 92
- ☺ EIA485 2-wire 92
- Address 93
- 15.4 DATA ENCODING 93
- 16. Calibration 104
- 16.2 Offsets 105
- 16.3 Input Calibration 107
- CALIBRATION 108
- FAIL’ if not. Fail may be 108
- 16.3.6 CT Calibration 112
- 16.4 Calibration Parameters 113
- 17.1 Loading an IDM 114
- 17.3 Starting iTools 115
- 17.4 Starting the Wizard 116
- 17.5 To configure the Input 117
- 17.6 To Configure Alarms 118
- 17.7 To Customise Messages 119
- 17.8 To Promote Parameters 123
- 17.10 To Set up Recipes 126
- 17.11 Summary 129
- 17.12 Cloning 130
- Power requirements 131
- 19. Parameter Index 133
- 20. Index 135
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