Emerson IP258 manual Duty Mode Desludge Mode, Start on Stop on Stop if Do not start if

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7.0 PROGRAMMING THE MSM400 FUNCTIONS

DUTY (MODE)

DESLUDGE MODE.

There are several methods of starting, stopping, overriding and stopping early a de-sludge operation. The desired options can be selected in the SETUP – DUTY (Mode) – DESLUDGE menu. The following table explains the various options.

(PV = process value i.e. % suspended solids)

Start on

Stop on

Stop if

Do not start if

PV above level*

PV below level**

PV below level**

Digital i/p 2 low****

Digital i/p 1 low ***

Digital i/p 1 low ***

Digital i/p 1 low ***

 

Time

Max Time

 

 

Normally relay 1 is used for control purposes. Relay two is normally the alarm relay.

If selected, the desludge operation defaults to “Start on”– Time, “Stop on”– PV below a level.

“Do not start if” and “Stop if” are set to “none” (i.e. in default conditions these do not affect the desludge operation).

*Above level is above Relay 1 or 2 On Point

**Below level is below Relay 1 or 2 Off Point

***Digital input 1 low for 1 sec, 2 sec, 5 sec, 10 sec, 15 sec, 20 sec, 30 sec, 40 sec, 50 sec, 60 sec, 90 sec, 120 sec, 180 sec, 240 sec & none

****Digital input 2 low for 1 sec, 2 sec, 5 sec, 10 sec, 15 sec, 20 sec, 30 sec, 40 sec, 50 sec, 60 sec, 90 sec, 120 sec, 180 sec, 240 sec & none

The min and max times described in Set point operation also apply in de-sludge mode.

If it is required to set the control unit up to Start on Time then 4 parameters can be set up:-

1.Start time 1

2.Time interval 1

3.Start time 2

4.Time interval 2.

(Start time 2 and interval 2 default to not used.)

The time interval indicates the interval between de-sludges.

Start time 1 indicates the time of the first de-sludge operation. A de-sludge will always happen at this time each day independent of the time interval.

Start time 2 indicates the time of another fixed de-sludge time.

If either of the start times are set to 0:00 then the interval associated with that start time is not used. If both of the time intervals are set to 0:00 then de-sludge only occurs at the start times.

The following table shows the default and limits of the time desludge operations.

No. of operation.

Set in

Default value

Max value

 

(hrs & mins.)

(hrs & mins)

(hrs & mins)

Start time 1

hh:mm

8:00

23:59

Time interval 1

hh:mm

1:00

24:00

Start time 2

hh:mm

0:00

23:59

Time interval 2

hh:mm

0:00

24:00

Example:

In this example it is required to control the desludge operation as follows: Relay 1 will be used to open a discharge valve. Desludge cycles should start at fixed intervals. Each desludge cycle should stop on detection of thin sludge, thus preventing unwanted transfer of clear liquor. The “Stop if” function will also be used to stop the desludge using a digital input (i.e. an external trigger.). from a pump protection switch if the pump should fail. Typically in this example the sensor is mounted close to the bottom of a primary tank or in the discharge line.

IP258

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Contents Mobrey Contents Safety Precautions Sensor Connection IVE Neutral Earth Mains DisplayENT Product Introduction MSM400 Slurry Monitoring System Product DescriptionSlurry Characteristics Ultrasonic Attenuation versus Suspended solidsSuspended Sensor Type MSM433 Mobrey Pipe Section SensorsSensor Type Numbering System Control Unit MSM400 Displays and KeypadKeypad Operation SPECIFICATIONS--MSM400 HartEMC Pipe Section Installation Suspended Sensor InstallationPreliminary Checks Sensor Cables Control UnitTerminal Label Function Hart Connections and Jumper Settings Sensor ConnectionsRelays Current OutputSafety Precautions Initial Power UPMains Supply Main Menu Toggle RUN Calibration Setup Toggle RUN Calibration Setup MonitorToggle RUN Diagnostic Parameters EX-FACTORY System FeaturesZero Setting Initial Zero Calibration Methods Auto CAL Auto CAL Zero Setting Procedure Rechecking ZeroAutocal Span Setting Procedure Clear Liquor Press ENT To set 23.1dB 26.2dBSample Press ENT to set 33.6dB 44.2dB Auto CAL LAB ValuesZero Setting Procedure Maximum % SolidsSpan CALIBRATION/GRADIENT Methods Calibration Method 1-SLURRY TypeAttenuation VALUE-METHOD Duty Mode Desludge Mode No. of operation Set Default value Max value Hrs & minsStart on Stop on Stop if Do not start if INPUT↓ Output Start Time #1 hm 730 P254 Outputs Current Output Relay OperationAlarm Middle Display←−−−−−−− Lower Display Display option parameter number DescriptionSettings Engineering Frequency SETSystem Test Current Output Hart Smart Communications SensorsAppendix A1 Main Menu SUB Menu Parameter DescriptionPar No Alarm Report DiagnosticsLogging EngineeringMin Max Default Value Parameter DescriptionParameter Description Min Max Default Value MSM400 MonitFrom list 3.6/21mA/hold last reading Min Max Default Value Ex-Factory Manufacturer’s Code Appendix A3 Hart and Psion Operating Instructions Hart ConsiderationsCalibration adjustments at operating conditions Smart Communication with the Mobrey MSM400Further customisation using the Smart HHC Hand Held Communicator Assembly Instructions Handheld Communicator Mobrey CKFig DII. Loop diagram Fig D1 MOBREY-CK* HHC assembly How to connect the Smart Communicator Hand Held Communicator Operation Mobrey Find Save Diary Calc Time Notes World Alarm How to drive a Psion based Smart CommunicatorTAG Tank Help D7.0 Introduction and Function menuD7.1 Monitor/Display Parameters D D7.2 Program Parameters PDefault Register Mode KEYWorking Register Safe RegisterHand Held Communicator Registers Select Data Source 10.0ERROR Messages on the HHC 10.1Alarm and Error MessagesPrintout or PC transfer of MSM400 programme data Display of Parameter Data10.2Invalid Data Entry Password not Open Instrument in Multidrop Mode10.3Communication Errors Invalid Action not the Same InstrumentD0 D8 Current Output ** Set current Trim-maximum Trim-maximum 11.0Current Loop Checks and TrimmingCurrent and USE ↑ & ↓ To Trim the Output 12.0Unknown InstrumentD13.0 Smart Interfaces Compatibility D13.1 Introduction 13.3Use of multiple Smart CommunicatorsEmerson Process Management Rosemount Measurement

IP258 specifications

The Emerson IP258 is an advanced industrial monitoring device designed to enhance operational efficiency and ensure optimal performance in various industrial applications. It is particularly suited for monitoring, controlling, and managing processes across diverse industries such as oil and gas, pharmaceuticals, food and beverage, and water treatment.

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The device is designed with high reliability and durability in mind, featuring superior environmental resistance to withstand harsh industrial conditions. Its rugged housing and advanced components ensure long-term performance, reducing the likelihood of unexpected downtime and maintenance costs.

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Overall, the Emerson IP258 stands out as a powerful and versatile tool for industrial monitoring and control, combining advanced features, robust technology, and user-friendly design to meet the demands of modern industrial environments.
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