Emerson 54e pH/ORP Controller Mode Priority Chart, Condition Definitions, Action Definitions

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MODEL 54e pH/ORP

SECTION 6.0

 

THEORY OF OPERATION

6.8CONTROLLER MODE PRIORITY

Your Model 54e pH/ORP can function in different modes depending on both how it is configured, what process conditions exist, and actions an operator may have made. To reconcile these possible modes, there is a set priority that determines exactly what will happen to the 2 current outputs and the 4 alarm relays in the event of mul- tiple modes occurring at the same time. See Table 6-1 below.

Priority is in the following order (from lowest to highest): normal, fault, timer, hold, feed limit, test. Each output or relay acts as if it is only in the state of highest priority.

NOTE

Some of these features may not be in use for your con- troller.

TABLE 6-1. Controller Mode Priority Chart

 

Condition

Priority

Current

Current

Alarm

Alarm

Alarm

Alarm

 

 

 

Output 1

Output 2

Relay 1

Relay 2

Relay 3

Relay 4

 

 

 

 

 

 

 

 

 

 

 

Normal

1

Normal

Normal

Normal

Normal

Normal

Open

 

 

 

 

 

 

 

 

 

 

 

Fault

2

Default

Default

Default

Default

Default

Closed

 

 

 

 

 

 

 

 

 

 

 

Interval Timer

3

Hold

Hold

Default/

Default/

Default/

Prior

 

 

 

 

 

Normal1

Normal1

Normal1

 

 

 

Hold Mode

4

Hold

Hold

Default

Default

Default

Prior

 

 

 

 

 

 

 

Feed Limit

5

Normal

Normal

Open1

Open1

Open1

Closed

 

 

Simulate tests

6

Test1

Test1

Test1

Test1

Test1

Test1

1Indicates the state IF that item has been configured or selected (i.e. if it is an interval timer or a feed limit timer or it is the one being tested). Unconfigured or unselected items are not affected by that mode.

Condition Definitions:

1.Normal refers to conditions when no other mode is present.

2.Fault is when the instrument has diagnosed a fault condition. A fault message is displayed and the red LED will be on.

3.Interval Timer is only while the timer sequence is occurring.

4.Hold Mode is while hold is activated by the operator (i.e. during calibration).

5.Feed Limit occurs when a feed limit timer has reached it's limit and is turned off after being on for too long.

6.Simulate tests are described in Section 5.4.

Action Definitions:

1.Normal is determined by process conditions or how the item has been configured (Sections 5.5, 5.6)

2.Open is a deenergized alarm relay. (alarm off)

3.Default is the setting configured for each item if there is a fault. (Sections 5.5, 5.6)

4.Closed is an energized alarm relay. (alarm on)

5.Hold is the setting for the current output configured in Section 5.5 (this could be a fixed mA value or the last normal value)

6.Prior is the state the alarm had before that mode occurred.

7.Test is the value input by the operator (mA for current, on or off for a relay).

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Contents Model 54e pH/ORP PH/ORP Hart Analyzer/ControllerElectrical Shock Hazard Essential InstructionsPage Model 54E PH/ORP Microprocessor Analyzer Description and SpecificationsSection Title List of Tables Appendix TitleTable No Title About This Document Table of Contents List of FiguresGeneral Description Section Description and SpecificationsDescription of Controls Current Outputs Specifications Physical Specifications GeneralPower Relative Humidity 95%, non condensing AlarmsRecommended Sensors Analyzer Specifications @ 25CCode Options Ordering InformationPart NO. Description Unpacking and Inspection Section InstallationMechanical Installation Locating the ControllerPanel Mounting Alarm Relay Output Wiring Section WiringPower Input Wiring Analog Output Wiring454EPH02 PH Sensor Compatibility PH Sensor WiringTions will Result in Controller MALFUNC- Tion 454EPH01 Cable Dressing Final Electrical Check Wiring to Model Introduction Section CalibrationAdjust temp 25.1 C Hold Mode OffTemperature Calibration Buffer 1 -- Wait Autocal bufferAutomatic TWO-POINT Calibration Use the arrow keys to select the correct buffer Auto buffer cal doneCalibration Notes Manual TWO-POINT Calibration Calibrate pointPt 04.00pH 25C Pt calibration doneSINGLE-POINT pH Calibration Standardize 7.01 pH59.16 mV/pH Temperature Compensation OptionsTemp comp Auto Output trimOutput trim Hold ModeTrim Outputs PH Settings List Section Software ConfigurationRanges Factory Settings User Settings Diagnostics Section Outline of Menu Levels Setpoint 07.00 pH Alarm High 14.00pHChanging Alarm Setpoints Simulate testsChanging Output Setpoints PID only Setpoint 7.00 pH4mA 0.00 pH 20mA 2.00 pH Setpoint + 06.90 pHMA +00.00 pH OutputOutput MA 0.00 pH 20 mA 14.00 pH Output 1 12.00 mASimulated tests Alarm setpoints Output setpointsTest output Test alarm Testing Outputs and AlarmsTest alarm 1 Open Test alarm 1 OpenMeasure pH Display right AL2Security Caution Display contrast Timeout OnOutput Control Parameters Control ModeDisplay Changing Output ParametersRange 4-20 mAl Fault 22.00 mARange 4-20 mA Hold Disable feature Fault 22.00mAOutput 2 control Output 2 setup Hold feature setupAlarm 3 control AlarmsInterval timer Relay Default None Alarm LowSetpoint 0.01 pH Delay 0 sec Hysteresis 0.01 pH Delay 0 secURV 2.00 pH Relay default NoneSetpoint +07.00 pH Time period 30 secAlarm 4 Setup Alarm FaultFeed limit Disable Timeout 3600 secRecovery 600 sec Timer DisableOn time 120 sec Interval Timer Examples Diagnostics Off DiagnosticsZero offset 60 mV Stabilize pH 0.01 pH Stabilize time 10 sec DiagnosticsAuto Calibration Setup Autocal StandardStandard Buffers Auto Calibration SetupSection Theory of Operation Continuous Sensor DiagnosticsTypical set points Interval TimerSee .8 for instructions on chang- ing these setpoints Time Proportional Control TPC Mode Code Alarm RelaysAnalog Outputs Normal ModeAction Definitions Controller Mode PriorityController Mode Priority Chart Condition DefinitionsMeasurement and Set Point Feedback Control PID Control Mode CombinationsPID Control Code PID ControlProportional Gain Plus Integral Reset Proportional Mode GainControl Loop Adjustment and Tuning Process Reaction Curve Process Reaction Curve MethodPID Control Password Protection Section Special Procedures and FeaturesLevel 1 3 Password Privileges Lock all Configuring SecuritySecurity Custom CurveTemp coeff +.000 Solution Temperature CompensationSensor iso 07.00 pH Operate iso +07.00 pH Troubleshooting is easy as 1, 2, 3… Section TroubleshootingDiagnostic Messages Description of problem Diagnostic MessagesSymptom Action Quick Troubleshooting GuideDiagnostic Variables Theoretical pH vs. Millivolt Values at 25C 77F Ohms Ambient Temperature Troubleshooting GuidelinesTemperature Compensation Circuit Troubleshooting ProcedurePreamp in a junction box Figure Preamplifier Troubleshooting ProcedureController preamp check Figure Junction Box Preamplifier Check No Power Troubleshooting GuideCoated glass electrode Clean with soft cloth and clean water Password protected Part Number Description Replacement PartsGeneral Warranty RepairNON-WARRANTY Repair Section Return of MaterialQuick Startup ORP Appendix a ORP ConfigurationItem Choices ORP Settings User Settings Table A-1. ORP Settings ListDiagnostics Section Choices ORP Settings User SettingsSimulated tests Output setpointsORP Calibration Standardize 400 mVSensor or Circuit Board only Return of Materials RequestReturn of Material WarrantySpecifications subject to change without notice
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