Function Description, 127 | Toshiba L5232 specs

6F8A0917

10. Function Description

The LF232 flowmeter converter is equipped with 4 digital outputs and 2 digital inputs (1 digital output as standard), enabling you to use these as various functions such as pulse output and alarm outputs.

Digital I/O functions are described below.

Functions	Description

Flow totalization	Totalizes flow volume in volumetric unit.
	For totalized flow, a pulse output per each unit of flow volume can be
	sent out.
	The operation to start, stop and reset the totalizer and pulse output can
	be controlled with Digital Input.

Multiple ranges	Measuring ranges can be switched in accordance with flow rate.
	Measuring ranges can be switched automatically or by control using
	Digital Inputs.

Forward and reverse ranges	Forward and reverse direction flows can be measured.
	Forward and reverse ranges can be combined with multiple ranges.

Flow rate High/Low limit	If the flow rate exceeds or lowers below the preset value, an alarm will
(High-high limit/Low-low limit)	be output.
alarms	2 high limit alarm outputs and 2 low limit alarm outputs, 4 alarm
	outputs in total, can be sent out.

Fluid empty alarm	If the fluid to be measured flows out from the measuring pipe of the
	detector, an alarm is output.
	(In the case of LF232*F, fluid empty alarm function is not usable.)

Preset counter	If the count of the totalizer exceeds the preset value, a signal is output.

Remote still water zero adjustment	Still water zero adjustment can be controlled using Digital Inputs.

Fixed value output (loop output)	Fixed value for current output and pulse output can be sent out to
	perform a loop check for output lines.
	The fixed value output mode can also be switched by control using
	Digital Inputs.

Converter error alarm	If an error is detected such as memory error or excitation circuit error,
	an alarm is output.

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Image 128

Toshiba L5232 manual Function Description, 127

Contents

Electromagnetic Flowmeter Converter LF232 Type 6F8A0917 6F8A0917 Nd Edition August First Edition June Color explanation Explanation of signal wordsSafety symbols Safety Precautions Safety Precautions for Installation and Wiring Usage limitation Safety Precautions for Maintenance and InspectionWarranty and Limitation of Liability Handling Precautions Do not store or install the flowmeter Handling Precautions Table of Contents 6F8A0917 6F8A0917 Storage Product Inspection and StorageProduct Inspection Features Overview Names of Parts Appearance Internal structure with converter cover opened Terminal block construction Installation Hands 6F8A0917 How to Install the Converter Unit inch mm Example of Pipe Mounting Wiring Urn off mains power before working on pipesFrom mains power Do not conduct wiring work with bare hands Installation Cables Installation Cables External Connections 6F8A0917 Excitation cable Wiring MethodTerminal Treatment of Cables Connecting the input signal cable Terminal Treatment of Flow Rate Signal Cable Power cable, current output cable and digital I/O cables Cable Connection Connection to Terminal Block 9a Wiring between Detector and Converter Grounding Difficult 10 Detector Grounding Method Digital I/O Connections 11 Connection Example of Electromagnetic Counter Replacing the LF230 Converter InstallationWiring 12 How to Connect an Adjusting Capacitor Combination with an Existing Detector for Large Meter Size Replacement of partially filled pipes type 6F8A0917 Operation 6F8A0917 Display and Controls Display and Controls LCD display Operation switch infrared switchNames and Functions of Display and Controls Instructions Functions of each switch Measurement modeMenu display Setting mode Counter in operaiton Resets the counter Flow velocity value and instantaneous flow rate display Display FormatMeasured value display format Total difference flow value display Total count displayTotal flow value display Percent display Custom unit display Fixed output display Mode SwitchingError message / other message display ENTER111 6F8A0917 Setting Mode Operation Moving to the menu display To return from the menu display to the measurement mode Checking or changing the setting values Password Input Mode switching flow when password is set Example of password input mode selection SET and password Totalizer Operation Example of totalizer operation Maintenance Menu Example to move to the maintenance menu Setting Menu List Return to measurement mode Parameter Settings / Adjustment Parameter Setting Items Checking the exciting current value Parameters Check / ChangeExciting Current Value Changing the exciting current value Meter Size Checking the meter size of the detector Changing the meter size of the detector Exciting Frequency Checking the exciting frequency10,1/6,1/4 2.5 to 6 mm 26 to 120 500 to 3000 mm Changing the setting value for exciting frequency Flow Direction Checking the flow direction Switch Changing the flow direction Password Setting Checking the password Changing the password Checking the normal indicating unit Indicates the value in percent of the setting rangeNormal Indicating Unit Currently set main indicating unit % in this example Changing the flow direction for total flow Unit string of custom unit Custom UnitCoefficient of custom unit Proceed as follows to check the coefficient of custom unit Checking the coefficient of custom unitChanging the coefficient of custom unit Proceed as follows to check the unit string of custom unit Checking the unit string of custom unitChanging the unit string of custom unit Span Value Range Range type Span value Unit of span Hysteresis Span value range setting flowSetting sequence of span value range is shown below Checking each constant Range 2 span valueRange 3 span value Range 4 span value Changing the range type Changing the span value Changing the hysteresis Proceed as follows to check the damping constant Damping ConstantChecking the damping constant Changing the damping constant Proceed as follows to check the low cutoff value Low Cutoff valueChecking the low cutoff value Changing the low cutoff value Checking the current output value used when an alarm occurs Current Output Setting Used When an Alarm OccursCurrent output setting function used when an alarm occurs Changing the current output value used when an alarm occurs Display low cut On/Off Checking whether the display low cut is On or Off Changing the display low cut On/Off setting Output Low Limit Setting Checking the output low limit value settingOutput low limit value Proceed as follows to check the output low limit value Changing the output low limit value setting Digital output functions corresponding to each terminal Digital output state only when alarm output is setDigital I/O Function Digital Input Function Checking each setting for digital I/O Digital Output alarm stateDigital Input control signal level Digital Output Changing each setting for digital I/O Digital Output alarm status Count rate Pulse width modeCount Rate Pulse Rate and Pulse Width Pulse width Over Spec Pulse width Checking the count rate and pulse widthChanging the count rate Changing the pulse width mode setting Changing the pulse width Preset output function Preset CounterPreset count value Checking the preset counter setting Changing the preset count value Changing the preset output function 100 Flow Rate High/Low limit Alarm High/low limit alarm On/OffHigh/low limit value 101 Checking the high/low limit alarm setting High-high limit alarmLow-low limit alarm On/Off 102 Changing the high/low limit alarm On/Off 103 Changing the high/low limit value 104 Fluid Empty Alarm Setting the fluid empty alarmChecking the fluid empty alarm On/Off setting 105 Changing the fluid empty alarm On/Off setting 106 107 Self-diagnosis function On/Off settingSelf-Diagnosis Function 108 Alarm output factor settingChecking the self-diagnosis alarm setting Changing the self-diagnosis function setting 109 Checking the rate-of-change limit setting Rate-of-Change Limit Value and Control TimeRate-of-change limit value Rate-of-change control time Changing the rate-of-change limit setting 111 Initial Settings When Shipped from the Factory 112 113 Fixed value output On/Off setting Fixed output mode can be selected by the setting as followsFixed Value Output Loop Check Fixed current output value 115 Checking the fixed output function settingFixed pulse output value Changing the fixed output function 116 Changing the fixed output constant 117 118 Zero AdjustmentStill Water Zero Adjustment 119 Zero Offset Adjustment How to calculate the zero offset valueChecking the zero offset adjustment value 120 Changing the zero offset adjustment value 121 122 Mag-Prover CalibrationCalibration Items Converter Check / Calibration 1 0% Flow Rate Calibration Zero CalibrationChecking the zero point Calibrating the zero point 2 50% Flow Rate Calibration Checking the 50% flow rate value124 50% flow rate value can be checked only 3 100% Flow Rate Calibration Span Calibration Checking the span valueCalibrating the span value 125 Monitor value of the exciting current can be checked Checking the Exciting Current Value126 Function Description 127 Digital I/O Specifications Digital OutputsDigital Input option 128 Totalizer and Pulse Output 129 130 Totalizer operation using digital input signals 131 Multi-Range Functions 132 133 Output performance when multiple ranges are usedSingle direction internal automatic switching, 4 ranges Forward direction Direction Output when switched from Reverse to134 Single direction external signal switching, 2 ranges 135 136 Single direction external signal switching, 4 ranges 137 Flow Rate High/Low Limit Alarm Output Flow rate high/low limit alarm output performance138 Case of Single range Case of Multi-range setting 139 140 Fluid Empty Alarm Output Output when an alarm is generatedAlarm output state described in 8.2.14 Digital I/O Function 141 Preset Counter Output Function 142 Preset counter output performance 143 144 145 Output example of one-shot pulse output Remote Still Water Zero Adjustment 146 Remote Selection of Fixed Value Output 147 Converter Error Alarm Output 148 149 Communications FunctionConnection with the HHT terminal 150 Connection to the Converter Main Unit Procedure for Communication with HHT 151 Wiring cable Interference on 4 to 20mA current signalUse a shielded cable CVV-S, etc for wiring Current output load Diagnosis and Alarms Diagnostic messagesSetting error High/low limit alarm 154 Process error alarmFluid empty alarm Self-diagnosis error 155 Output When an Error or Alarm Occurs 156 Maintenance and Inspection Maintenance Check / Replacement of power supply unit Product disposalOperative life 158 159 TroubleshootingFlow rate is not indicated Flow rate indication is not correct 160 Flow rate indication is not stable 161 When switch operation is unable 162 = K × B × D × Q Principle of Operation163 Specifications SpecificationsDetector Combined Specifications 164 165 Converter specifications 166 167 168 Model Number Table 169 170 Outline Drawing 171Electromagnetic Flowmeter Converter LF232 Type Gross mass approx lb8kg including a mounting plate 172 FCF50017