Emerson Process Management MSL600 manual Relay parameters, Alarm, Transducer out-of-water time

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Installation, Operation & Maintenance Manual

IP262/Z0, Rev. AB

February 2012

MSL600

5.6 Relay parameters

The MSL600 offers various options for operating its relays. There are 2 relays that are programmable to different modes, these modes are:

•Alarm

•Set point operation

•De-sludge

•On

•Off

•None

•Fault

•Slg Lev Limits (Sludge Level Limits)

The mode of operation is selected through the SETUP – OUTPUT – RELAY – Relay Mode menu.

The default mode for Relay 1 is set point operation and for Relay 2 default mode is alarm. Relay 3 is permanently assigned to fault mode (see section 7.6 for further details).

5.7 Alarm

There are six different alarm conditions in the SETUP - OUTPUT - ALARM menu. Each alarm condition can be set to operate a relay, or drive the current output, or both, or neither to the following states:

•Current output – 3.6mA, 21mA or Hold as defined in “Alarm action” in the CURRENT OUTPUT menu.

•Relay outputs – The relays energise in the alarm condition if they are programmed in Alarm mode.

The relays or current output must be set up for alarm action for this function to operate. The available alarm actions are shown in the list below:

•Out of limits

•Current saturated

•Memory filling

•Digital Input

•Max Retries

•Xdr tilted

•Dirty supernatant

•Noise Alarm

5.8Transducer out-of-water time

Certain installations make use of a picket fence thickener or a variety of rotating scrappers and scum boards. These rotating arms at the surface of the liquid will periodically lift the articulated transducer out of the liquid as they sweep by.

The transducer includes a (non-mercury) mechanical tilt switch. This is used to indicate when the transducer is being tilted and lifted out of the water. The MSL600 uses this information to determine whether valid sonar echo profile data is being received. If not then measurement will pause and outputs will be held until the arm is vertical again.

When the transducer is tilted a timer is started. The time for which the transducer has been tilted is compared to a maximum allowed value, programmed by the user. If this time is exceeded then an alarm condition can be flagged. It is possible to program an alarm relay to respond to this flag. This is intended to detect problems if the fence should stop under the transducer, etc. The time for which the transducer has been tilted is available as a Monitor readings parameter (D833).

When the arm returns to the vertical the timer is re-set to zero and if allocated the alarm cancelled.

If the transducer has been out of water for greater than the time allowed then its temperature may be significantly different to that of the supernatant.

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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 MSL600Mounting bracket Important MSL600 featuresSelf-cleaning Human Machine InterfaceLocation As a systemRotating bridge Application planningCircular clarifiers Static bridge Rectangular clarifiersMounting bracket attachment InstallationPreliminary checks LocationAttaching 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 Item Description Detailed operationMenu structure Main menu itemScrolling Direct accessParameter editing Main menu parameters Installation parametersApplication parameters Stop On P251 De-sludge parametersDescription P240 Start On P250Max Retries P257 Stop If P252Start Time P253 Interval P254MA 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 On mode relay RL1 and RL2 Fault mode relay RL1 and RL2 parameters P560 to P570Set point mode relay RL1 and RL2 De-sludge mode relay RL1 and RL2HMI upper, middle, and lower display options Display parameters HMIRelay On and Off Points Relay overrides Min ON, Max ON, and Min OFFClear Profile Backlight On/Off P575Clear Trend Fast log P591 Low Mem Alarm P593Logging parameters Log Interval P590Common algorithm parameters P621 to P629 Parameter values Default Min Max 128 1024Engineering parameters 1 Alg. Select P620Noise Alrm Lev P622 Parameter values Default Min Max 100 Top Blanking P623Parameter values Default Min Max 9999 Upr S-nat Temp P625 Default Min Max +85 105 185Bottom Blanking P628 Default Min Max +85 185 SoS constant P627Default metric m/s Lwr S-nat Temp P626Sharp Echo Reject P631 Parameter values Default Min Max Lost Echo Rnge P633Municipal 1 parameters P630 to P637 Significance P630Noise SD Mult P635 Parameter values Default Min Max Dirty Mult P636Parameter values Default Min Max Lost Echo Time P637 Parameter values Default Min Max 255Threshold level = Threshld Offset P640 + Noise Level D834 Parameter values Default Min Max 100Municipal 2 parameter P640 Threshld Offset P640Display test Load Defaults functionSystem parameters Auto Cycle functionComms 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 Transmit pulse and echo processing MaintenanceTroubleshooting Technical referenceSub-menu Level Parameter Title Par No Main Menu Option Programming chartProgramming chart … Direct Outputs Specification12.1 MSL600 Model No12.2 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
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