YOKOGAWA UT55A - 11.3 Setting Hysteresis to Alarm Operation

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11-15

IM 05P01C31-01EN

AlarmFunctions

11.2 SettingNumberofAlarmGroupstoUse

Description

Up to eight alarm groups of alarm type, alarm hysteresis, alarm (On-/Off-) delay timer,

and alarm setpoint are available.

Unused alarm parameters can be hidden and their functions can be turned off.

The initial value of parameter ALNO. is “4.”

When

ALNO.=

4,forexample,onlythefourgroupsofalarmtype,PVvelocityalarmtime

setpoint, alarm hysteresis, alarm delay timer, and alarm setpoint are displayed.

Setting Details

Parameter

symbol

Name

Display

level

Setting range Menusymbol

ALNO.

Number of alarm

groups

PRO 1 to 8 CTL

Note1: In Cascade control, the LP2 lamp is lit while the Loop-2 parameter is displayed.

Main Page

Contents4
- Trademarks5
- Safety Precautions5
- Handling Precautions for the Main Unit7
- Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC7
- Checking the Contents of the Package8
- Model and Suffix Codes of UT55A (for Standard Model)9
- Model and Suffix Codes of UT52A (for Standard Model)10
- Model and Suffix Codes of UT55A (for Detailed Model)11
- Model and Suffix Codes of UT52A (for Detailed Model)12
- Symbols Used in this Manual15
- How to Use this Manual16
- Table of Contents18
- Introduction4
- Notice4
- Target Readers4
Chapter 1 Introduction To Functions26
- Quick Setting Function26
- Input/Output Function27
- Control Functions29
- Control Mode29
- Display and Key Functions33
- Ladder Sequence Function34
- Communication Functions35
- Definition of Main Symbols and Terms39
Chapter 2 UT55A/UT52A Operating Procedures40
- UT55A/UT52A Operating Procedures40
Chapter 3 Part Names42
- Names and Functions of Display Parts42
- Names and Functions of Keys45
- List of Display Symbols48
- Brief Description of Setting Details (Parameters)50
Chapter 4 Basic Operation52
- Overview of Display Switch and Operation Keys52
- How to Set Parameters55
Chapter 5 Quick Setting Function App60
- Setting Using Quick Setting Function60
- Restarting Quick Setting Function65
Chapter 6 Monitoring And Control Of Regular Operations66
- Monitoring and Control of Operation Displays66
- Setting Target Setpoint84
  - Operation in the Operation Display84
  - Operation in Parameter Setting Display85
- Performing and Canceling Auto-Tuning86
- Adjusting PID Manually89
- Setting Alarm Setpoint95
- Selecting Target Setpoint Number (SPNO)96
- Switching Operation Modes97
- Manipulating Control Output During Manual Operation105
- Releasing On-State (Latch) of Alarm Output106
Chapter 7 Input (Pv, Remote, And Auxiliary Analog) Functions108
- Setting Functions of PV Input, Remote Input, and Auxiliary Analog Input108
- Setting Input Sampling Period (Control Period)120
- Using 4-Wire RTD as PV Input121
- Using Larger, Smaller, Average, or Difference of Two to Four Inputs as PV122
- Setting Remote Input Method123
- Adjusting PV Range for Loop Control with PV Switching or Loop Control with PV Auto-Selector124
- Setting PV Switching Methods of Loop Control with PV Switching125
Chapter 8 Control Functions130
- Setting Control Mode (CTLM)130
- Setting Control Type (CNT)197
- Setting PID Control Mode (ALG)216
- Switching PID218
- Suppressing Overshoot (Super Function)227
- Suppressing Hunting (Super2 Function)229
- Suppressing Integral Action (Anti-Reset Wind-Up)231
- Performing Non-Linear PID Control232
- Adjusting Auto-Tuning Operation233
Chapter 9 Auxiliary Control Functions234
- Setting SP Limiter234
- Changing SP at a Fixed Rate (SP Ramp-Rate Setting Function)235
- Forcing SP to Track PV (PV Tracking)237
- Forcing SP to Track Remote Input (SP Tracking)238
- Setting Controller Action at Power on (Restart Mode)239
- Setting Time between Powering on Controller and Starting Control (Restart Timer)240
Chapter 10 Output (Control And Retransmission) Functions242
- Setting Control Output Type242
- Setting Control Output Cycle Time246
- Setting Limiter to Control Output247
- Disabling Output Limiter in man Mode248
- Setting Velocity Limiter to Control Output249
- Reducing 4-20 Ma Current Output to 0 Ma (Tight Shut Function)250
- Setting ON/OFF Control Hysteresis251
- Canceling Offset of PV and SP (Manual Reset)253
- Setting Hysteresis and Dead Band for Heating/Cooling Control Output254
- Setting Hysteresis and Dead Band for Position Proportional Control Output256
- Setting Retransmission Output Terminal, Type, and Scales257
- Setting Preset Output Value260
- Setting 10-Segment Linearizer For Output265
- Changing Current Output Range267
- Setting Split Computation Output Function268
- Adjusting Motor-Operated Valve Position (Position Proportional Output)270
- Using 15 V DC Loop Power Supply274
Chapter 11 Alarm Functions276
- Setting Alarm Type276
- Setting Number of Alarm Groups to Use290
- Setting Hysteresis to Alarm Operation291
- Delaying Alarm Output (Alarm Delay Timer)292
- Setting Alarm Output to Control Relay Terminal293
- Setting Alarm Action According to Operation Mode294
- Setting Heater Break Alarm295
Chapter 12 Contact Input/Output Functions298
- Setting Contact Input Function298
  - Setting Contact Input Function305
  - Changing Contact Type of Contact Input307
- Setting Contact Output Function308
  - Setting Function of Contact Output308
  - Changing Contact Type of Contact Output314
Chapter 13 Display, Key, and Security Functions316
- Setting Display Functions316
- Assigning Function to User Function Key and A/M Key334
- Setting Security Functions337
- Confirmation of Key and I/O Condition and Version342
  - Confirmation of Key and I/O Condition342
  - Confirmation Of Version347
Chapter 14 Parameter Initialization348
- Initializing Parameter Settings To Factory Default Values348
- Registering And Initializing User Default Values349
  - Registering As User Setting (Default) Values349
  - Initializing To User Setting (Default) Values349
- Remedies if Power Failure Occurs During Operations350
- Power Frequency Setting351
Chapter 16 Troubleshooting, Maintenance, And Inspections352
- Troubleshooting352
- Maintenance366
- Periodic Maintenance367
- Disposal368
- Installation Location370
- Mounting Method372
- External Dimensions and Panel Cutout Dimensions373
- Wiring374
- Attaching and Detaching Terminal Cover410
Chapter 18 Parameters412
- Parameter Map412
- List of Parameters419
  - Operation Parameters419
  - Setup Parameters427
Chapter 19 Specifications454
- Hardware Specifications454
Appendix Input and Output Table464
- Appendix 1 Input And Output Table464
  - Input and Output Table (for Standard Model)464
- Appendix467
  - Input and Output Table (for Detailed Model)467
Appendix 2 Input and Output Table (for Detailed Model)468
Revision Information474

YOKOGAWA UT55A - 11.3 Setting Hysteresis to Alarm Operation

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