Emerson Process Management MSL600 manual Relay RL1 mode P410 and RL2 mode P420

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	Installation, Operation & Maintenance Manual
MSL600	IP262/Z0, Rev. AB
MSL600	February 2012

7.6 Relay parameters

The following parameters are used to program the 2 available relays RL1 and RL2, which are controlled by the sludge blanket level. The mode of relay RL3 is fixed to fault indication.

Note: A full menu structure is shown in section 11.

P	RL1	RL2
Mode	410	420
On Point	411	421
Off Point	412	422
Min ON	413	423
Max ON	414	424
Min OFF	415	425

Table (B): Relay Parameter numbers

7.6.1Relay RL1 mode (P410) and RL2 mode (P420)

The mode of operation, or function, of the relay can be selected from a list:

A)	Alarm	see page 32
B)	Fault	see page 33
C)	Set Point	see page 33
D)	De-sludge	see page 33
E)	On	see page 33
F)	Off	see page 33
G)	None	see page 33
H)	Slg lev limits (Sludge Level Limits)	see page 33
i)	Temp OL (Temperature Over Limits)	see page 33

7.6.1.1Alarm mode (relay RL1 and RL2 parameters P540 to 552)

There are several alarms which can be assigned to a relay. When an alarm condition occurs it may be signalled by relay, current, both relay and current, or not at all. Alarm conditions are listed below:

Out of Limits - P540

The sludge blanket level is outside the limits set in the relay on and off point parameters

mA o/p Sat. (Current Saturated) - P541

The current output is outside the limits set in the current output parameters.

Memory Filling - P542

The logging memory is filling. This alarm condition is activated when the remaining memory is less than the percentage programmed by the user in ‘Low Mem Alarm’ P593.

Digital Input - P543

If the digital input is active then the relay indicates alarms.

Max Retries - P544

If at the end of a de-sludge operation the start condition is still present for a programmed number of retries then the relay alarms.

Xdr Tilted - P550

An alarm can be activated after the transducer has been out of water for a user-programmed length of time.

Dirty S-nat - P551

If the supernatant gives a high degree of returned echo (indicating a significant number of suspended particles) then an alarm can be activated.

Noise Alarm - P552

An alarm is activated if the background noise exceeds the pre-set limit set in parameter P622.

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Contents Installation, Operation & Maintenance Manual MSL600Contents MSL600 12.1 12.2Before Operating this Device the Manual should be Read Fully About the MSL600 About this ManualImportant MSL600 features Self-cleaningHuman Machine Interface Mounting bracketAs a system LocationRotating bridge Application planningCircular clarifiers Rectangular clarifiers Static bridgeInstallation Preliminary checksLocation Mounting bracket attachmentInstalling the bracket on the bridge Attaching the MSL600MSL600 mounting Power and other electrical connections Transducer connectionsExternal connection terminals Cable extension Programming DisplayContrast viewing angle control Keypad and Menu NavigationSecurity On-line/Off-lineQuick start parameters Tank depth Bottom referenceTransducer self-cleaning Determination of tank depthCurrent output adjust MA current output parametersTransducer out-of-water time AlarmRelay parameters Digital input Detailed operation Menu structureMain menu item Menu Item DescriptionScrolling Direct accessParameter editing Main menu parameters Installation parametersApplication parameters De-sludge parameters Description P240Start On P250 Stop On P251Stop If P252 Start Time P253Interval P254 Max Retries P257Cleaning parameters MA output parametersAlarm Action P402 4 0/4-20mA P403Table B Relay Parameter numbers Relay RL1 mode P410 and RL2 mode P420Alarm mode relay RL1 and RL2 parameters P540 to Fault mode relay RL1 and RL2 parameters P560 to P570 Set point mode relay RL1 and RL2De-sludge mode relay RL1 and RL2 On mode relay RL1 and RL2Display parameters HMI Relay On and Off PointsRelay overrides Min ON, Max ON, and Min OFF HMI upper, middle, and lower display optionsClear Profile Backlight On/Off P575Clear Trend Low Mem Alarm P593 Logging parametersLog Interval P590 Fast log P591Parameter values Default Min Max 128 1024 Engineering parameters1 Alg. Select P620 Common algorithm parameters P621 to P629Parameter values Default Min Max 100 Top Blanking P623 Parameter values Default Min Max 9999 Upr S-nat Temp P625Default Min Max +85 105 185 Noise Alrm Lev P622Default Min Max +85 185 SoS constant P627 Default metric m/sLwr S-nat Temp P626 Bottom Blanking P628Parameter values Default Min Max Lost Echo Rnge P633 Municipal 1 parameters P630 to P637Significance P630 Sharp Echo Reject P631Parameter values Default Min Max Dirty Mult P636 Parameter values Default Min Max Lost Echo Time P637Parameter values Default Min Max 255 Noise SD Mult P635Parameter values Default Min Max 100 Municipal 2 parameter P640Threshld Offset P640 Threshold level = Threshld Offset P640 + Noise Level D834Load Defaults function System parametersAuto Cycle function Display testSettings parameters P730 to P737 and Base Units selection Comms parameters P710 to P716PIN parameter P740 Fixed parameters D750 to D753Readings and diagnostics parameters Readings parameters D800 to D834Diagnostics parameters D835 to D852 Min Xdr Temp D852 Speed of Sound D850Max Xdr Temp D851 Maintenance TroubleshootingTechnical reference Transmit pulse and echo processingProgramming chart Sub-menu Level Parameter Title Par No Main Menu OptionProgramming chart … Direct Specification 12.1 MSL600Model No Outputs12.2 MSL603 transducer WeightAdditional specification notes Dimensional drawings MSL600 Bridge mounted unitMSL600 and MSL603 assembly Fitting instructions MSL603 transducer cable extensionParts required MSL600 MSL600 Emerson Process Management Rosemount Measurement