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Issue: 5

25

th

July 2019

BA568E

Two Input

General purpose

Counter

Issue 5

1
2
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Содержание BA568E

Страница 1: ...Issue 5 25th July 2019 BA568E Two Input General purpose Counter Issue 5 ...

Страница 2: ...guration to factory defaults 5 29 Display overflow 6 Pulse Output 6 1 System design 6 2 Configuration 6 3 Access pulse output sub menu 6 4 Enable pulse output 6 5 Source of output pulse 6 6 Divide output pulse frequency 6 7 Output pulse width 7 Configuration example 8 Maintenance 8 1 Fault finding during commissioning 8 2 Fault finding after commissioning 8 3 Servicing 8 4 Routine maintenance 8 5 ...

Страница 3: ...unter The instrument has two inputs A and b which can be configured to accept pulses from most types of sensor and display the total number of pulses received and their combined rate on separate displays Each input can be individually configured to accept pulses from a wide variety of sensors When the sensor requires energising to determine its status such as a switch contact open collector or a t...

Страница 4: ...E Counter may be configured to provide direct access to the alarm setpoints from the display mode when the and buttons are operated simultaneously See 9 3 12 and 9 3 13 2 3 Displays The BA568E Counter has two digital displays and associated annunciators plus a pulse input indicator as shown on the front cover of this manual Total Shows the total pulse count on the display upper eight digit display...

Страница 5: ...iding the minimum operating voltage of the proximity detector is less than 7 5V Each input of the BA568E contains a configurable debounce circuit to prevent contact bounce being counted See section 5 6 including details of the maximum counting frequency 3 2 3 Open collector input Sensors with an open collector output may be directly connected to Counter input terminals 5 6 and 9 10 Polarity of the...

Страница 6: ...uced Figs 3 shows the overall dimensions together with the recommended panel cut out dimensions To achieve an IP66 seal between the instrument enclosure and the instrument panel the smaller cut out dimensions should be used and the instrument should be secured with four panel mounting clamps 4 2 EMC The BA568E Counter complies with the requirements of the European EMC Directive 2014 30 EU For spec...

Страница 7: ...e panel wiring is supported Fig 4 Fitting panel mounting clamps 4 4 Scale card The Counter s units of measurement may be shown on a printed scale card in a window at the right hand side of the display The scale card is mounted on a flexible strip that is inserted into a slot at the rear of the instrument as shown in Fig 5 Thus the scale card can easily be changed without removing the Counter from ...

Страница 8: ...lue clr val 00000000 Local clear loc clr Local total reset Clr tot oFF Local grand total reset Clr Gtot oFF Security code CodE 0000 Note While the instrument is being configured counting continues so that any input pulses occurring during this time are recorded 5 1 Calibration structure Fig 6 shows the calibration structure of the BA568E Counter The two pulse inputs are processed by the count func...

Страница 9: ...mory If after accessing the configuration menu the interval between operating any front panel push button exceeds one minute the BA568E will automatically return to the display mode and any configuration changes will not be stored in permanent memory When making changes to multiple configuration functions it is therefore sensible to occasionally return to the display mode to save the changes that ...

Страница 10: ...n di5P 2 Lower display Turns the lower display which normally shows rate on or oFF See section 5 15 dP Position of decimal points Defines the position of the decimal point in both the total and rate displays See section 5 16 5CALE t Total Scale Factor 5CALE t is a dividing factor that converts the pulse output from arithmetic Count function into the required total display in engineering units 5CAL...

Страница 11: ...e section 5 23 Clr tot When on is selected total display is reset when and buttons are operated simultaneously for more than 3 seconds in the display mode See section 5 24 Clr Gtot When on is selected the grand total may be reset when and buttons are operated simultaneously for more than 10 seconds in the display mode see section 2 2 for details Note Once reset the grand total can not be restored ...

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Страница 14: ...t miscounting when the input pulse has noisy edges such as those resulting from a mechanical contact closing and bouncing The debounce function only applies to the input in which the function is located Three levels of protection may be independently selected for each input The amount of debounce applied depends upon the type of Counter input that has been selected for the input in the associated ...

Страница 15: ...unt occurs to be selected It applies to input A for all counting modes except quadrature A rEL b To check or change the input A pulse edge on which the count occurs select CntEdG A from the configuration menu and press which will reveal EdGE 1 or EdGE 2 If required press the or button to change the setting followed by the button to return to the configuration menu EdGE 1 Type of input Counting edg...

Страница 16: ...ic relationship between Inputs A and Input b The following four modes may be selected Display Input count mode A b Pulses at input A added to pulses at input b A b Pulses at input b subtracted from pulses at input A A Con b Input b controls count direction of input A Input b Input A Low Up counter High Down counter A rEL b Quadrature input with sensors electrically 90o apart The pulse output is no...

Страница 17: ...tional Alarm outputs Optional 4 20mA output 5 17 Total scale factor 5CALE t 5CALE t is a dividing factor adjustable between 0 0001 and 99999 that enables the total to be displayed in engineering units e g if one pulse from the arithmetic count function represents 1 centimetre of dispensed cable and the total display is required in metres 5CALE t should be set to 100 0 which is the number of centim...

Страница 18: ...defines the amount of filtering applied to the display as shown below First digit Filter time constant Seconds 0X 0 1X 1 3 2X 4 3 3X 6 5 4X 8 7 5X 11 3 6X 15 7 7X 20 9 8X 25 2 9X 31 5 The second digit defines the deviation from the displayed rate at which the filter will be overridden and the rate display will move rapidly to the new value Second digit Magnitude of step change which will produce a...

Страница 19: ...d push buttons simultaneously for more than three seconds To check or change the setting select LoC CLr in the configuration menu and press which will reveal the Clr tot prompt operating again will show if the local total reset is on or oFF If set as required operate the button twice to return to the configuration menu or the or button to change the setting followed by the button twice to enter th...

Страница 20: ... is lost 5 28 Reset configuration to factory defaults r5Et dEF This function returns the BA568E Counter to the factory defaults shown in section 5 0 To prevent accidental use the request must be confirmed by entering 5urE before the configuration change will be executed Select r5Et dEF from the configuration menu and press the instrument will display 0000 with the first digit flashing To confirm t...

Страница 21: ...e occurs and the open collector closes P2 is connected to P1 and a pulse current flows through the diode return barrier to resistor R1 in the safe area The current flowing in the circuit is defined by resistor R1 which should be chosen to limit the pulse current to less than 10mA For a 24V supply R1 should be greater than 2 200Ω Fig 9 Generating voltage pulse in safe area using Zener barriers 6 2 ...

Страница 22: ...onous duplicate of input b pulse 5CALEd Output is derived from the total display and is only functional when the Count function is configured for A b When 5CALEd is selected two additional functions diVidE and durArion appear in the pulse output sub menu Using the or push button select 5ourCE in the pulse output sub menu and press to reveal the existing pulse source The function can be changed by ...

Страница 23: ...ay position is to be resettable by an external contact not from the BA568E Counter front panel Similarly the grand total is not to be resettable from the BA568E Counter front panel To prevent tampering the instrument configuration menu is to be protected by security code 1209 The BA568E may be configured on site without disconnection from the power supply or from the two proximity detectors If aft...

Страница 24: ...between the first and second least significant digits Operating the button will show and identify the rate display with all the digits activated Using the or button position the decimal point to the right of the least significant digit i e not visible Finally press to return to the configuration menu Step 7 Enter the total scale factor In this example the proximity detectors produce fifteen pulses...

Страница 25: ... and press to reveal the existing setting Using the or button select uP followed by to enter the selection and return to the configuration menu Step 12 Turn local clear off In this example the operator must not be able to zero the total cable position display or the grand total from the instrument front panel Both local clear functions should therefore be turned off Select LoC CLr from the main me...

Страница 26: ...ect security code That the correct security code is being used Contact BEKA if code is lost Alarms do not function Alarms have been disabled following calibration change Re enable both alarms 8 2 Fault finding after commissioning ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE If a BA568E Counter fails after it has been functioning correctly the following table may help to identify the cause of th...

Страница 27: ...ay time and alarm silence time Hysteresis may be applied to rate alarms CAUTION These alarm outputs should not be used for critical safety applications such as a shut down system When the BA568E power supply is turned off or disconnected alarm outputs will open irrespective of whether normally open or normally closed outputs have been selected When designing a system an open output should therefor...

Страница 28: ...e alarm setpoint The 5P1t alarm is activated when the rate or total display equals the setpoint Note 5P1r is displayed for a rate alarm and 5P1t for a total alarm See section 9 3 5 HI LO Alarm function Defines whether the alarm has a high or low function See section 9 3 6 no nc Normally open or normally closed output Determines whether the single pole alarm output is open or closed in the non alar...

Страница 29: ...arm sub menu 9 3 4 Type of alarm tYPE Alarm 1 and Alarm 2 are totally independent both may be rate or total alarms or one may be conditioned for rate and the other for total Using the or push button select tYPE from the selected alarm sub menu and press to check or change the function The or push button will toggle the selection between rAtE and totAL when set as required press the button to retur...

Страница 30: ...ich will reveal the existing hysteresis with one digit flashing The required hysteresis can be entered using the or push button to adjust the flashing digit and the button to transfer control to the next digit When set as required press to enter the value and return to the H5tr prompt in the alarm sub menu e g A BA568E Counter configured to display a rate of 0 to 5000 with a high alarm set at 4000...

Страница 31: ... from the sub menu and press which will cause the BA568E Counter to display 0000 with one digit flashing The flashing digit may be adjusted using the or push button when set as required operating the button will transfer control to the next digit When all the digits have been adjusted press to return to the ACCd prompt The revised security code will be activated when the BA568E Counter is returned...

Страница 32: ...m the instrument power supply so that no additional wiring is required but the supply current increases as shown below BA568E Maximum current consumption 10mA Additional for backlight 16mA Addition with terminals 3 4 linked 6mA Addition with terminals 7 8 linked 6mA _____ Total current 38mA max 9 5 4 20mA output The BA568E Counter can be supplied with an optional factory fitted galvanically isolat...

Страница 33: ...button followed by the button to return to 4 20tYPE prompt Note If the controlling source of the 4 20mA output is changed i e from rate to total the 4 20mA output will be disabled and the output will be a constant 3 5mA irrespective of the instrument display The 4 20mA output must always be re enabled and reconfigured following the controlling source being changed 9 5 6 Display which corresponds t...

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