Emerson Process Management MSL600 manual Digital input

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Installation, Operation & Maintenance Manual

MSL600

IP262/Z0, Rev. AB

February 2012

 

 

The transducer may take up to 1 hour to reach thermal equilibrium. Therefore, it may take some time to restore accurate blanket level readings. When the arm tilts out of the supernatant the MSL600 holds the last supernatant temperature reading from the transducer. When the transducer falls back into the supernatant the MSL600 starts to make measurements again.

When the MSL600 measures the supernatant temperature at the transducer, as long as the temperature is within the programmed normal limits for a supernatant then the system uses this measured temperature for speed of sound compensation.

If the measured temperature is outside of these limits then the MSL600 uses the last held temperature reading. This state will continue until a valid temperature reading is again obtained from the transducer in the supernatant.

The upper and lower temperature points are programmable as HMI Engineering parameters. The default values are -5 to +40°C (23 to 104 deg F). The lower temperature should always be less than the upper and valid entries should be limited to temperatures between -40°C and +85°C (-40 to 185 deg F).

Because the tilt switch is sensitive to vibration as well as angle it is de-bounced in software. An engineering parameter exists in the HMI to allow this function to be turned on and off, in the case of for example a particularly vibration prone bridge.

5.9 Digital input

Parameter P340 is used to assign the status of the digital input to an alarm relay if desired. This allows the user to stop measurement whilst the blanket is known to be disturbed and meaningful results would not be obtained. E.g. during high in-flow or when top water level falls below the transducer face and normal measurements can’t be performed.

When the digital input is active all measurements continue as normal and the LED still flashes. The sonar pulse echo display continues to update with live data. However, the blanket level is held at its last value. The trend graph continues to update, relays and current output remain active, and logging continues using the held blanket level.

Digital input active means either a short across the terminals, i.e. from a contact closure or a PLC driving low, i.e. going to ‘0’.

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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 LocationApplication planning Circular clarifiersRotating bridge 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 parametersAlarm Relay parametersTransducer out-of-water time Digital input Detailed operation Menu structureMain menu item Menu Item DescriptionDirect access Parameter editingScrolling Installation parameters Application parametersMain menu 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 P403Relay RL1 mode P410 and RL2 mode P420 Alarm mode relay RL1 and RL2 parameters P540 toTable B Relay Parameter numbers 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 optionsBacklight On/Off P575 Clear TrendClear Profile 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 Speed of Sound D850 Max Xdr Temp D851Min Xdr Temp D852 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 OutputsWeight Additional specification notes12.2 MSL603 transducer Dimensional drawings MSL600 Bridge mounted unitMSL600 and MSL603 assembly MSL603 transducer cable extension Parts requiredFitting instructions MSL600 MSL600 Emerson Process Management Rosemount Measurement
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