Emerson Process Management MSL600 Stop If P252, Start Time P253, Interval P254, Max Retries P257

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Installation, Operation & Maintenance Manual

IP262/Z0, Rev. AB

February 2012

MSL600

7.3.3Stop If - P252

Use this parameter to select if it is necessary to override the “Stop on” condition. The selectable options are:

Not used

Sludge Level

The parameter defaults to none which means it is not used.

Parameter values:

Default	Min	Max
None	-	-

7.3.4Start Time - P253

This is the time of the day at which the first de-sludge operation starts. The time is programmed in hours and minutes. This parameter is set up in conjunction with the de-sludge Interval P254.

Parameter values:

Default	Min	Max
07:00	-	-

7.3.5Interval - P254

The parameter is the interval between de-sludge events.

After a start time has been programmed, the interval between each de-sludge needs to be programmed.

For example, if it is required that the de-sludge cycle starts at 7:00am each morning then 07:00 is entered in P253. If it is then required that a de-sludge cycle is carried out every hour thereafter, 01:00 is entered in P254.

Parameter values:

Default	Min	Max
01:00	-	-

7.3.6Max Retries - P257

This parameter is the maximum number of retries allowed following an unsuccessful de-sludge cycle. If the maximum retries is exceeded, and a relay is programmed, and allocated in alarm mode, it can be used to signal this fact.

A retry occurs if the start condition is still present when the stop condition occurs or if a relay maximum run time is exceeded and the stop condition has not been reached.

To prevent a relay from remaining on, the relay minimum off time must be programmed (see P415).

Parameter values:

Default	Min	Max
10	0	250

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Contents MSL600 Installation, Operation & Maintenance ManualContents MSL600 12.2 12.1Before Operating this Device the Manual should be Read Fully About this Manual About the MSL600Self-cleaning Important MSL600 featuresHuman Machine Interface Mounting bracketLocation As a systemRotating bridge Application planningCircular clarifiers Static bridge Rectangular clarifiersPreliminary checks InstallationLocation Mounting bracket attachmentAttaching the MSL600 Installing the bracket on the bridgeMSL600 mounting Transducer connections Power and other electrical connectionsExternal connection terminals Cable extension Display ProgrammingKeypad and Menu Navigation Contrast viewing angle controlOn-line/Off-line SecurityTank depth Bottom reference Quick start parametersDetermination of tank depth Transducer self-cleaningMA current output parameters Current output adjustTransducer out-of-water time AlarmRelay parameters Digital input Menu structure Detailed operationMain menu item Menu Item DescriptionScrolling Direct accessParameter editing Main menu parameters Installation parametersApplication parameters Description P240 De-sludge parametersStart On P250 Stop On P251Start Time P253 Stop If P252Interval P254 Max Retries P257MA output parameters Cleaning parameters4 0/4-20mA P403 Alarm Action P402Table B Relay Parameter numbers Relay RL1 mode P410 and RL2 mode P420Alarm mode relay RL1 and RL2 parameters P540 to Set point mode relay RL1 and RL2 Fault mode relay RL1 and RL2 parameters P560 to P570De-sludge mode relay RL1 and RL2 On mode relay RL1 and RL2Relay On and Off Points Display parameters HMIRelay overrides Min ON, Max ON, and Min OFF HMI upper, middle, and lower display optionsClear Profile Backlight On/Off P575Clear Trend Logging parameters Low Mem Alarm P593Log Interval P590 Fast log P591Engineering parameters Parameter values Default Min Max 128 10241 Alg. Select P620 Common algorithm parameters P621 to P629Parameter values Default Min Max 9999 Upr S-nat Temp P625 Parameter values Default Min Max 100 Top Blanking P623Default Min Max +85 105 185 Noise Alrm Lev P622Default metric m/s Default Min Max +85 185 SoS constant P627Lwr S-nat Temp P626 Bottom Blanking P628Municipal 1 parameters P630 to P637 Parameter values Default Min Max Lost Echo Rnge P633Significance P630 Sharp Echo Reject P631Parameter values Default Min Max Lost Echo Time P637 Parameter values Default Min Max Dirty Mult P636Parameter values Default Min Max 255 Noise SD Mult P635Municipal 2 parameter P640 Parameter values Default Min Max 100Threshld Offset P640 Threshold level = Threshld Offset P640 + Noise Level D834System parameters Load Defaults functionAuto Cycle function Display testComms parameters P710 to P716 Settings parameters P730 to P737 and Base Units selectionFixed parameters D750 to D753 PIN parameter P740Readings parameters D800 to D834 Readings and diagnostics parametersDiagnostics parameters D835 to D852 Min Xdr Temp D852 Speed of Sound D850Max Xdr Temp D851 Troubleshooting MaintenanceTechnical reference Transmit pulse and echo processingSub-menu Level Parameter Title Par No Main Menu Option Programming chartProgramming chart … Direct 12.1 MSL600 SpecificationModel No Outputs12.2 MSL603 transducer WeightAdditional specification notes MSL600 Bridge mounted unit Dimensional drawingsMSL600 and MSL603 assembly Fitting instructions MSL603 transducer cable extensionParts required MSL600 MSL600 Emerson Process Management Rosemount Measurement