Communications Function, 149 | Toshiba L5232 manual

6F8A0917

11. Communications Function

The LF232 Series Converters are equipped with HART*1 protocol to transmit digital signals over the 4 to 20mA output line. The AF900 hand-held terminal (hereafter called HHT) can be used to check or change various parameters, calibrate the flowmeter or monitor the measured value from a remote place.

For the detailed operation and specification of HHT, refer to the "Hand-held Terminal for Sensor with Communication Function AF900 Instruction Manual" (6F8A0849).

*1 HART protocol: The “HART protocol”, which stands for Highway Addressable Remote Transducer, is the name of the communication protocol for industry sensors that is recommended by HCF (HART Communication Foundation).

11.1Connection with the HHT terminal

Connect the probe cable of the HHT terminal in parallel with the load resistor which is wired from the current output terminals (+ and −) of the flowmeter. Since the tip end of the probe cable is a pair of clips, use a junction terminal or a terminal block, etc. to connect with the clips of the probe. To connect the HHT directly to the flowmeter, use the terminals + and − of the converter main unit terminal block. Though the current output terminal has polarity, the HHT connection cable has no polarity.

See Figure 11.1 and 11.2 for connection examples.

4 to 20 mADC (Communication line)

Load resistor

Terminal block or junction terminal

LF232 Converter

HHT

Figure 11.1 Connections to the Current Output Line

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Image 150

Toshiba L5232 manual Communications Function, Connection with the HHT terminal, 149

Contents

Electromagnetic Flowmeter Converter LF232 Type 6F8A0917 6F8A0917 Nd Edition August First Edition June Explanation of signal words Safety symbolsColor explanation Safety Precautions Safety Precautions for Installation and Wiring Safety Precautions for Maintenance and Inspection Warranty and Limitation of LiabilityUsage limitation Handling Precautions Do not store or install the flowmeter Handling Precautions Table of Contents 6F8A0917 6F8A0917 Product Inspection and Storage Product InspectionStorage 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 Wiring Method Terminal Treatment of CablesExcitation 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 Installation WiringReplacing 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 Operation switch infrared switch Names and Functions of Display and ControlsLCD display Instructions Menu display Setting mode Functions of each switchMeasurement mode Counter in operaiton Resets the counter Display Format Measured value display formatFlow velocity value and instantaneous flow rate display Total count display Total flow value displayTotal difference flow value display Percent display Custom unit display Mode Switching Error message / other message displayFixed 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 Parameters Check / Change Exciting Current ValueChecking 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 Indicates the value in percent of the setting range Normal Indicating UnitChecking the normal indicating unit Currently set main indicating unit % in this example Changing the flow direction for total flow Custom Unit Coefficient of custom unitUnit string of custom unit Checking the coefficient of custom unit Changing the coefficient of custom unitProceed as follows to check the coefficient of custom unit Checking the unit string of custom unit Changing 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 Span value range setting flow Setting sequence of span value range is shown belowHysteresis 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 Damping Constant Checking the damping constantProceed as follows to check the damping constant Changing the damping constant Low Cutoff value Checking the low cutoff valueProceed as follows to check the low cutoff value Changing the low cutoff value Current Output Setting Used When an Alarm Occurs Current output setting function 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 output state only when alarm output is set Digital I/O FunctionDigital 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 Pulse width mode Count Rate Pulse Rate and Pulse WidthCount rate Pulse width Over Spec Checking the count rate and pulse width Changing the count ratePulse width Changing the pulse width mode setting Changing the pulse width Preset Counter Preset count valuePreset 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 On/Off setting Self-Diagnosis Function107 Alarm output factor setting Checking the self-diagnosis alarm 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 Checking the fixed output function setting Fixed pulse output value115 Changing the fixed output function 116 Changing the fixed output constant 117 Zero Adjustment Still Water 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 Mag-Prover Calibration Calibration Items122 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 Checking the Exciting Current Value 126Monitor 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 Output performance when multiple ranges are used Single direction internal automatic switching, 4 ranges133 Output when switched from Reverse to 134Forward 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 Communications Function Connection with the HHT terminal149 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 Process error alarm Fluid empty 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 Troubleshooting Flow rate is not indicated159 Flow rate indication is not correct 160 Flow rate indication is not stable 161 When switch operation is unable 162 Principle of Operation 163= 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