Diagnosis and Alarms, Diagnostic messages, 153 | Toshiba L5232

6F8A0917

12. Diagnosis and Alarms

12.1Diagnostic messages

The LF232 converter is equipped with the function to diagnose such errors as setting errors, I/O errors or internal errors of the instrument and shows the error messages on the LCD display or on the HHT through communications. The diagnostic messages and their corrective actions are described below.

Setting error

If you try to set a constant or a unit exceeding the specified range in the setting mode, an error is displayed to prevent erroneous setting.

	LCD display	Description	Corrective action

	* H.OVER SPEC.	Setting value exceeds the settable	Try to set a value within the
	* H.OVER SPEC.	range.	settable range again.
		range.	settable range again.

	* L.OVER SPEC.	Setting value is below the settable
	* L.OVER SPEC.	range.
		range.

	* H.OVER C RATE	Count rate exceeds the settable
	* H.OVER C RATE	range.
		range.

	* L.OVER C RATE	Count rate is below the settable
	* L.OVER C RATE	range.
		range.

	* MULTI RNG ERR	Span value setting does not satisfy	Try to set a span value that
	* MULTI RNG ERR	the multi-range requirements.	satisfies the requirements.
		the multi-range requirements.	satisfies the requirements.

High/low limit alarm

An alarm message appears if the flow rate indication goes out of the set range.

If the alarm is set to OFF, this function does not work. For how to set this function, see 8.2 “Parameter Check/Change.”

	LCD display	Description	Corrective action

	HIGH ALARM	Flow rate is above the high limit	Adjust so that the flow rate stays
	HIGH ALARM	set-point value.	below the set-point value.
		set-point value.	below the set-point value.

	H-HIGH ALARM	Flow rate is above the high-high	Adjust so that the flow rate stays
	H-HIGH ALARM	limit set-point value.	below the set-point value.
		limit set-point value.	below the set-point value.

	L ALARM	Flow rate is below the low limit	Adjust so that the flow rate stays
	L ALARM	set-point value.	below the set-point value.
		set-point value.	below the set-point value.

	L-LOW ALARM	Flow rate is below the low-low	Adjust so that the flow rate stays
	L-LOW ALARM	limit set-point value.	below the set-point value.
		limit set-point value.	below the set-point value.

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Toshiba L5232 manual Diagnosis and Alarms, Diagnostic messages, Setting error, High/low limit alarm, 153

Contents

Electromagnetic Flowmeter Converter LF232 Type 6F8A0917 6F8A0917 Nd Edition August First Edition June Safety symbols Explanation of signal wordsColor explanation Safety Precautions Safety Precautions for Installation and Wiring Warranty and Limitation of Liability Safety Precautions for Maintenance and InspectionUsage limitation Handling Precautions Do not store or install the flowmeter Handling Precautions Table of Contents 6F8A0917 6F8A0917 Product Inspection Product Inspection and StorageStorage 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 From mains power WiringUrn off mains power before working on pipes Do not conduct wiring work with bare hands Installation Cables Installation Cables External Connections 6F8A0917 Terminal Treatment of Cables Wiring MethodExcitation cable 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 Wiring InstallationReplacing the LF230 Converter 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 Names and Functions of Display and Controls Operation switch infrared switchLCD display Instructions Menu display Setting mode Functions of each switchMeasurement mode Counter in operaiton Resets the counter Measured value display format Display FormatFlow velocity value and instantaneous flow rate display Total flow value display Total count displayTotal difference flow value display Percent display Custom unit display Error message / other message display Mode SwitchingFixed output 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 Exciting Current Value Parameters Check / ChangeChecking the exciting current value Changing the exciting current value Meter Size Checking the meter size of the detector Changing the meter size of the detector 10,1/6,1/4 2.5 to 6 mm Exciting FrequencyChecking the exciting frequency 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 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 Span Value Range Range type Span value Unit of span Setting sequence of span value range is shown below Span value range setting flowHysteresis Range 3 span value Checking each constantRange 2 span value Range 4 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 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 value Output Low Limit SettingChecking the output low limit value setting Proceed as follows to check the 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 Input control signal level Checking each setting for digital I/ODigital Output alarm state Digital Output Changing each setting for digital I/O Digital Output alarm status Count Rate Pulse Rate and Pulse Width Pulse width modeCount rate Pulse width Over Spec 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 Checking the preset counter setting Changing the preset count value Changing the preset output function 100 High/low limit value Flow Rate High/Low limit AlarmHigh/low limit alarm On/Off 101 Low-low limit alarm On/Off Checking the high/low limit alarm settingHigh-high limit alarm 102 Changing the high/low limit alarm On/Off 103 Changing the high/low limit value 104 Checking the fluid empty alarm On/Off setting Fluid Empty AlarmSetting the fluid empty alarm 105 Changing the fluid empty alarm On/Off setting 106 Self-Diagnosis Function Self-diagnosis function On/Off setting107 Checking the self-diagnosis alarm setting Alarm output factor setting108 Changing the self-diagnosis function setting 109 Rate-of-change limit value Checking the rate-of-change limit settingRate-of-Change Limit Value and Control Time 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 Loop Check Fixed value output On/Off settingFixed output mode can be selected by the setting as follows Fixed current output value Fixed pulse output value Checking the fixed output function setting115 Changing the fixed output function 116 Changing the fixed output constant 117 Still Water Zero Adjustment Zero Adjustment118 119 Checking the zero offset adjustment value Zero Offset AdjustmentHow to calculate the zero offset value 120 Changing the zero offset adjustment value 121 Calibration Items Mag-Prover Calibration122 Checking the zero point Converter Check / Calibration1 0% Flow Rate Calibration Zero Calibration Calibrating the zero point 124 2 50% Flow Rate CalibrationChecking the 50% flow rate value 50% flow rate value can be checked only Calibrating the span value 3 100% Flow Rate Calibration Span CalibrationChecking the span value 125 126 Checking the Exciting Current ValueMonitor value of the exciting current can be checked Function Description 127 Digital Input option Digital I/O SpecificationsDigital Outputs 128 Totalizer and Pulse Output 129 130 Totalizer operation using digital input signals 131 Multi-Range Functions 132 Single direction internal automatic switching, 4 ranges Output performance when multiple ranges are used133 134 Output when switched from Reverse toForward direction Direction Single direction external signal switching, 2 ranges 135 136 Single direction external signal switching, 4 ranges 137 138 Flow Rate High/Low Limit Alarm OutputFlow rate high/low limit alarm output performance Case of Single range Case of Multi-range setting 139 140 Alarm output state described in 8.2.14 Digital I/O Function Fluid Empty Alarm OutputOutput when an alarm is generated 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 Connection with the HHT terminal Communications Function149 150 Connection to the Converter Main Unit Procedure for Communication with HHT 151 Use a shielded cable CVV-S, etc for wiring Wiring cableInterference on 4 to 20mA current signal Current output load Setting error Diagnosis and AlarmsDiagnostic messages High/low limit alarm Fluid empty alarm Process error alarm154 Self-diagnosis error 155 Output When an Error or Alarm Occurs 156 Maintenance and Inspection Maintenance Operative life Check / Replacement of power supply unitProduct disposal 158 Flow rate is not indicated Troubleshooting159 Flow rate indication is not correct 160 Flow rate indication is not stable 161 When switch operation is unable 162 163 Principle of Operation= K × B × D × Q Detector Combined Specifications SpecificationsSpecifications 164 165 Converter specifications 166 167 168 Model Number Table 169 170 Electromagnetic Flowmeter Converter LF232 Type Outline Drawing171 Gross mass approx lb8kg including a mounting plate 172 FCF50017