Flow Rate High/Low Limit Alarm Output, 138 | Toshiba L5232 guide

6F8A0917

10.4Flow Rate High/Low Limit Alarm Output

Proceed as follows to use the flow rate high/low limit alarm.

High/Low Limit Alarm

Value Setting

•Follow the procedure in 8.2.17 “Flow Rate High/Low alarm” and set the high limit alarm, high-high limit alarm, low limit alarm or low-low limit alarm to ON and set the alarm value.

For the alarm not used, set OFF to that alarm setting.

DO Setting

•Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output (DO) for high limit output, high-high limit alarm output, low limit alarm output or low-low limit alarm output. In addition, for alarm output state, select Normally Open or Normally Closed.

Flow rate high/low limit alarm output performance

•In the case of Single range

Output (%)

High limit set-point value
Hysteresis
2.5%
Low limit set-point value
Low limit alarm	High limit alarm	Low limit alarm
generated	generated	generated
		Time

*The output state when an alarm occurs becomes the state set for alarm output of digital output. When the power supply of the converter is turned off, the contact is open.

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Toshiba L5232 manual Flow Rate High/Low Limit Alarm Output, Flow rate high/low limit alarm output performance, 138

Contents

6F8A0917 Electromagnetic Flowmeter Converter LF232 Type Nd Edition August First Edition June 6F8A0917 Safety symbols Explanation of signal wordsColor explanation Safety Precautions for Installation and Wiring Safety Precautions Warranty and Limitation of Liability Safety Precautions for Maintenance and InspectionUsage limitation Do not store or install the flowmeter Handling Precautions Handling Precautions Table of Contents 6F8A0917 6F8A0917 Product Inspection Product Inspection and StorageStorage Overview Features Appearance Names of Parts Internal structure with converter cover opened Terminal block construction Hands Installation 6F8A0917 Unit inch mm How to Install the Converter Example of Pipe Mounting Do not conduct wiring work with bare hands WiringUrn off mains power before working on pipes From mains power Installation Cables Installation Cables External Connections 6F8A0917 Terminal Treatment of Cables Wiring MethodExcitation cable Terminal Treatment of Flow Rate Signal Cable Connecting the input signal cable Cable Connection Power cable, current output cable and digital I/O cables Connection to Terminal Block Grounding 9a Wiring between Detector and Converter 10 Detector Grounding Method Difficult 11 Connection Example of Electromagnetic Counter Digital I/O Connections Wiring InstallationReplacing the LF230 Converter Combination with an Existing Detector for Large Meter Size 12 How to Connect an Adjusting Capacitor Replacement of partially filled pipes type 6F8A0917 Operation 6F8A0917 Display and Controls Display and Controls Names and Functions of Display and Controls Operation switch infrared switchLCD display Instructions Counter in operaiton Resets the counter Functions of each switchMeasurement mode Menu display Setting mode Measured value display format Display FormatFlow velocity value and instantaneous flow rate display Total flow value display Total count displayTotal difference flow value display Custom unit display Percent display Error message / other message display Mode SwitchingFixed output display ENTER111 6F8A0917 Moving to the menu display Setting Mode Operation To return from the menu display to the measurement mode Checking or changing the setting values Mode switching flow when password is set Password Input Example of password input mode selection SET and password Totalizer Operation Example of totalizer operation Example to move to the maintenance menu Maintenance Menu Return to measurement mode Setting Menu List Parameter Setting Items Parameter Settings / Adjustment Exciting Current Value Parameters Check / ChangeChecking the exciting current value Changing the exciting current value Checking the meter size of the detector Meter Size Changing the meter size of the detector 26 to 120 500 to 3000 mm Exciting FrequencyChecking the exciting frequency 10,1/6,1/4 2.5 to 6 mm Changing the setting value for exciting frequency Checking the flow direction Flow Direction Changing the flow direction Switch Checking the password Password Setting Changing the password Normal Indicating Unit Indicates the value in percent of the setting rangeChecking the normal indicating unit Currently set main indicating unit % in this example Changing the flow direction for total flow Coefficient of custom unit Custom UnitUnit string of custom unit Changing the coefficient of custom unit Checking the coefficient of custom unitProceed as follows to check the coefficient of custom unit Changing the unit string of custom unit Checking the unit string of custom unitProceed as follows to check the unit string of custom unit Range type Span Value Range Unit of span Span value Setting sequence of span value range is shown below Span value range setting flowHysteresis Range 4 span value Checking each constantRange 2 span value Range 3 span value Changing the range type Changing the span value Changing the hysteresis Checking the damping constant Damping ConstantProceed as follows to check the damping constant Changing the damping constant Checking the low cutoff value Low Cutoff valueProceed as follows to check the low cutoff value Changing the low cutoff value Current output setting function used when an alarm occurs Current Output Setting Used When an Alarm OccursChecking the current output value used when an alarm occurs Changing the current output value used when an alarm occurs Checking whether the display low cut is On or Off Display low cut On/Off Changing the display low cut On/Off setting Proceed as follows to check the output low limit value Output Low Limit SettingChecking the output low limit value setting Output low limit value Changing the output low limit value setting Digital I/O Function Digital output state only when alarm output is setDigital output functions corresponding to each terminal Digital Input Function Digital Output Checking each setting for digital I/ODigital Output alarm state Digital Input control signal level Digital Output alarm status Changing each setting for digital I/O Count Rate Pulse Rate and Pulse Width Pulse width modeCount rate Over Spec Pulse width Changing the count rate Checking the count rate and pulse widthPulse width Changing the pulse width mode setting Changing the pulse width Preset count value Preset CounterPreset output function Changing the preset count value Checking the preset counter setting 100 Changing the preset output function 101 Flow Rate High/Low limit AlarmHigh/low limit alarm On/Off High/low limit value 102 Checking the high/low limit alarm settingHigh-high limit alarm Low-low limit alarm On/Off 103 Changing the high/low limit alarm On/Off 104 Changing the high/low limit value 105 Fluid Empty AlarmSetting the fluid empty alarm Checking the fluid empty alarm On/Off setting 106 Changing the fluid empty alarm On/Off setting Self-Diagnosis Function Self-diagnosis function On/Off setting107 Checking the self-diagnosis alarm setting Alarm output factor setting108 109 Changing the self-diagnosis function setting Rate-of-change control time Checking the rate-of-change limit settingRate-of-Change Limit Value and Control Time Rate-of-change limit value 111 Changing the rate-of-change limit setting 112 Initial Settings When Shipped from the Factory 113 Fixed current output value Fixed value output On/Off settingFixed output mode can be selected by the setting as follows Fixed Value Output Loop Check Fixed pulse output value Checking the fixed output function setting115 116 Changing the fixed output function 117 Changing the fixed output constant Still Water Zero Adjustment Zero Adjustment118 119 120 Zero Offset AdjustmentHow to calculate the zero offset value Checking the zero offset adjustment value 121 Changing the zero offset adjustment value Calibration Items Mag-Prover Calibration122 Calibrating the zero point Converter Check / Calibration1 0% Flow Rate Calibration Zero Calibration Checking the zero point 50% flow rate value can be checked only 2 50% Flow Rate CalibrationChecking the 50% flow rate value 124 125 3 100% Flow Rate Calibration Span CalibrationChecking the span value Calibrating the span value 126 Checking the Exciting Current ValueMonitor value of the exciting current can be checked 127 Function Description 128 Digital I/O SpecificationsDigital Outputs Digital Input option 129 Totalizer and Pulse Output 130 131 Totalizer operation using digital input signals 132 Multi-Range Functions Single direction internal automatic switching, 4 ranges Output performance when multiple ranges are used133 134 Output when switched from Reverse toForward direction Direction 135 Single direction external signal switching, 2 ranges 136 137 Single direction external signal switching, 4 ranges Case of Single range Flow Rate High/Low Limit Alarm OutputFlow rate high/low limit alarm output performance 138 139 Case of Multi-range setting 140 141 Fluid Empty Alarm OutputOutput when an alarm is generated Alarm output state described in 8.2.14 Digital I/O Function 142 Preset Counter Output Function 143 Preset counter output performance 144 Output example of one-shot pulse output 145 146 Remote Still Water Zero Adjustment 147 Remote Selection of Fixed Value Output 148 Converter Error Alarm Output Connection with the HHT terminal Communications Function149 Connection to the Converter Main Unit 150 151 Procedure for Communication with HHT Current output load Wiring cableInterference on 4 to 20mA current signal Use a shielded cable CVV-S, etc for wiring High/low limit alarm Diagnosis and AlarmsDiagnostic messages Setting error Fluid empty alarm Process error alarm154 155 Self-diagnosis error 156 Output When an Error or Alarm Occurs Maintenance Maintenance and Inspection 158 Check / Replacement of power supply unitProduct disposal Operative life Flow rate is not indicated Troubleshooting159 160 Flow rate indication is not correct 161 Flow rate indication is not stable 162 When switch operation is unable 163 Principle of Operation= K × B × D × Q 164 SpecificationsSpecifications Detector Combined Specifications 165 166 Converter specifications 167 168 169 Model Number Table 170 Gross mass approx lb8kg including a mounting plate Outline Drawing171 Electromagnetic Flowmeter Converter LF232 Type 172 FCF50017