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8.4.

Overflow and Underflow Control

The unit continuously monitors both input channels for possible overflow or underflow
situations (input signal out of specified range)

Overflow:

the analogue input signal is greater than +10,2 V or +20,4 mA

Underflow: the analogue input signal is lower than -10,2 V or -0,4 mA

Any out-of-range situation will cause a message according the table below:

Display

Input A

Input B

Underflow

o.k

Overflow

o.k

Underflow

o.k

Overflow

Underflow

Overflow

Underflow

Overflow

Summary of Contents for AX 345

Page 1: ...s and Optocoupler Outputs AX 348 Process Indicator with Serial RS232 RS485 Interface Two analogue inputs with independent scaling each 10V or 0 4 20 mA Operating modes for display of input A or input B or the combinations A B A B A x B and A B Useful supplementary functions like Tare function programmable averaging functions programmable linearization etc Power supply 115 230 VAC and 17 30 VDC in ...

Page 2: ...is unit is used with applications where failure or mal operation could cause damage to a machine or hazard to the operating staff it is indispensable to meet effective precautions in order to avoid such consequences Regarding installation wiring environmental conditions screening of cables and earthing you must follow the general standards of industrial automation industry Errors and omissions exc...

Page 3: ... 18 6 3 1 Single mode input A only 18 6 3 2 Dual Mode Inputs A and B separately 19 6 3 3 Combined Modes A B A B A B A x B 20 6 4 Additional settings for the Preselections model AX 347 only 21 6 4 1 Basic settings for the Presets 21 6 4 2 Characteristics of the switching hysteresis 22 6 4 3 Operational settings for presets 23 6 4 4 Actual switching state of the outputs 23 6 4 5 Response time of swi...

Page 4: ...inearization functions Process controllers of series AX 345 348 have been designed for this kind of requirements Model AX 345 provides display function only Model AX 346 provides additional analogue outputs 10 volts and 0 4 20 mA a separate manual is available for the AX346 model Model AX347 provides two additional Preselections with Optocoupler outputs Model AX 348 provides additional serial comm...

Page 5: ...V DC in 3 4 5 6 7 8 9 10 GND 230VAC 115 VAC 0 VAC Input A Input B AGND GND 24V DC out COM OUT 1 OUT 2 PE optional see AX 348 Model with serial RS232 RS485 interface 1 GND 2 17 30V DC in 3 4 5 6 7 8 9 10 GND 230VAC 115 VAC 0 VAC Input A Input B AGND GND 24V DC out PE optional siehe GND RxD A TxD B The connection of PE is optional and not necessary for safety or for EMC However with some application...

Page 6: ...e consumption depends on the level of the supply voltage typical 80 mA at 30V or 130mA at 17V plus current taken from the aux output For AC supply terminals 0 VAC and 115 VAC or 230 VAC can be used The total AC power is approximately 7 5 VA 2 2 Aux voltage output Terminal 7 provides an auxiliary output of 24 V DC 100 mA max for supply of sensors and encoders This is valid for AC supply and DC supp...

Page 7: ...ree Please connect terminal 8 COM to the positive potential of the voltage you like to switch range 5V 35V You must not exceed the maximum output current of 150mA Where you intend to switch inductive loads please provide filtering of the coil by means of external diodes Opto Opto 33 R 8 9 10 Com 5 35 V Output 1 max 150 mA Output 2 max 150 mA 33 R Preset2 Preset1 ...

Page 8: ...ard to the rear to remove the PCB from the housing ON DIP DIL Switch Removal of the back plane Location of the DIL switch Never set DIL switch positions 1 and 2 or DIL switch positions 3 and 4 to ON at the same time After setting the switch shift the print carefully back to the housing and avoid damage of the front pins for connection to the front keypad plate 2 3 5 RxD RxD TxD TxD GND Screen PC A...

Page 9: ...ect the rear screw terminal strips remove the back plane from the unit and pull the PCB out of the housing jumper insered screw terminal strip locking tab factory preset A current B current A voltage B voltage A voltage B current A current B voltage A mA V B mA V A mA B mA A mA V A mA V A mA V B mA V B mA V B mA V A mA A mA A mA B mA B mA B mA Wrong jumper settings may cause serious damage to the ...

Page 10: ...s DC by use of a remote resistance in series to the input line please observe applicable safety standards You can calculate the value from the formula Rx k 3 x Vx V 30 R resistance value V input voltage Example Desired input 100 volts R 3 x 100 30 k 270 k With regard to the scaling procedure described later the new maximum input with resistance will work like a 10 volts signal with no resistance ...

Page 11: ...ay state Setup state a Basic setup b Operational parameter setup Teach operation 4 1 Normal display state You can change over to the other states while the unit is in the normal display state only Change over to Key operation Basic setup Keep ENTER and SET down simultaneously for 3 seconds Operational parameter setup Keep ENTER down for 3 seconds Teach operation Keep SET down for 3 seconds The Cmd...

Page 12: ...t will be highlighted blink This procedure allows setting all digits to the desired values After the most significant digit has been set the low order digit will blink again and you can do corrections if necessary With signed parameters the high order digit will only scroll between the values 0 positive and negative 4 2 3 How to store settings To store the actual setting press the ENTER key which ...

Page 13: ... to the factory default values The factory default settings are shown in the parameter listings in section 6 When you decide to set all parameters to default please be aware that all previous settings will be lost and you will need to do the whole set up procedure once more To execute the Default setting function Power the unit down Press the ENTER key Power the unit up again while the ENTER key i...

Page 14: ... All parameters as good as possible are designated by text fragments Even though the possibilities of forming texts are very limited with a 7 segment display this method has proved to be most suitable for simplification of the programming procedure The subsequent table is to show the general structure of the whole menu only Detailed descriptions of all parameters will follow in section 6 Menu over...

Page 15: ... StArtA End A End A End A dPoi A dPoi A dPoi A FiLt A FiLt A FiLt A OFFS A OFFS A inPutb inPutb StArtb StArtb End b End b dPoi b dPoi b FiLt b FiLt b OFFS b n FAc d FAc P FAc dPoint S tim AX 348 only S mod AX 348 only S CodE AX 348 only P01_H P01_Y P16_H P16_Y appears only when the Offset function has been enabled appears only when the linearization is switched on ...

Page 16: ...put B Dividing operation ratio A B Multiplying operation product A x B Brightness of the display 100 100 100 of maximum brightness 80 80 of maximum brightness 60 60 of maximum brightness 40 60 of maximum brightness 20 20 of maximum brightness Update time of the display 0 300 Updates the display every x xxx seconds Setting range from 0 050 to 5 999 seconds Keypad interlock code Keypad enabled conti...

Page 17: ...xecute the Teach function The Cmd key will execute both the Tare and the Teach function 6 2 Operational parameters After the basic setup you can access the operational parameters by pressing ENTER for at least 3 seconds You will only find those parameter texts that are relevant for your mode of operation To exit the menu keep again ENTER down for at least 3 seconds or just wait for the automatic T...

Page 18: ... will display with a full scale input of 10 volts or 20 mA 99999 99999 1000 Decimal point for signal A Select the desired position of the decimal point 00000 0 000000 No decimal point 00000 0 one decimal position 0 00000 five decimal positions Average filter input A Adjustable floating average filter for smoothing the display with unsteady input signals No filtering 2 4 8 16 Number of floating ave...

Page 19: ... a zero input signal of 0 volts or 0 4 mA 99999 99999 0 End value B Value which the unit will display with a full scale input of 10 volts or 20 mA 99999 99999 1000 Decimal point for signal B Select the desired position of the decimal point 000000 000000 No decimal point 00000 0 one decimal position 0 00000 five decimal positions Average filter input B Adjustable floating average filter for smoothi...

Page 20: ... as with the Dual mode for individual display of inputs A and B The combined display will then be the result calculated from both single values The following additional parameters provide a final scaling facility so you can read out the result of your combination in proper engineering units Menu Text Setting Range Default Proportional Scaling Factor Multiplies the result by this setting 10000 1000...

Page 21: ...t 1 switching characteristics Greater Equal Output is statically active with display greater or equal Preset Lower Equal Output is statically active with display lower or equal Preset Greater Equal Output is dynamically active with display greater or equal Preset timed output impulse Lower Equal Output is dynamically active with display lower or equal Preset timed output impulse Signal source of s...

Page 22: ...mmable Hysteresis for output 2 0 99999 0 Serves to generate an anticipation signal at a fixed distance to the preset 1 signal The anticipation automatically follows the settings of preset 1 6 4 2 Characteristics of the switching hysteresis The direction of operation of the Hysteresis setting depends on the selected switching characteristics GE or LE and is explained in the figure below Preset valu...

Page 23: ... 4 Actual switching state of the outputs At any time you can find out the actual switching state of the outputs For this just push the ENTER key shortly during normal operation The display will then provide one of the following information for the next two seconds Display Meaning Both outputs are OFF output transistors in high impedance state Both outputs are ON output transistors in low impedance...

Page 24: ...or Maximum and Preset 2 for Minimum control 6 4 5 Response time of switching outputs The response time of the transistor outputs is fully independent of the selected update time for the display With operating mode Single the response time of the outputs is typically 53 msec provided that average filter and linearization function are switched off Use of the average filter and the linearization func...

Page 25: ...number between 11 and 99 The address must however not contain a 0 because such numbers are reserved for collective addressing of several units 0 99 11 Serial Data Format The first character indicates the number of data bits The second character specifies the Parity Bit Even Odd or no Parity Bit The third character indicates the number of Stop Bits Baud Rate The following Baud Rates can be set for ...

Page 26: ...transmissions are shown in the table Baud Rate Minimum Cycle Time ms 600 384 1200 192 2400 96 4800 48 9600 24 19200 12 38400 6 Serial Mode PC Operation according to communication profile see 6 5 3 Print1 Transmission of string type 1 see 6 5 4 Print2 Transmission of string type 2 see 6 5 4 Serial Register Code 100 120 101 Specifies the register code of the data to be transmitted The most important...

Page 27: ...1 0011 0001 0011 1010 0011 0001 0000 0101 With a correct request the unit will respond with the adjoining response string Leading zeros will be suppressed BCC provides a Block Check Character formed by Exclusive OR of all characters from C1 through ETX STX C1 C2 x x x x x x x ETX BCC STX Control Character Hex 02 C1 Register Code High Byte C2 Register Code Low Byte x x x x x Data display value ETX ...

Page 28: ...eed Carriage return X X X X X X LF CR Print2 Sign Data Carriage return X X X X X X CR The mode of activation of serial transmissions can be determined as follows Cyclic timed transmissions Set the Serial Timer to any value 0 010 sec Select the desired string type by parameter S mod After exit from the menu the transmissions will start automatically Manual activation of transmissions Set the Serial...

Page 29: ...aling of the display Select combination and final scaling if applicable 6 3 1 and 6 3 2 6 3 3 Configuration of switching outputs AX 347 if applicable 6 4 Configuration of the serial interface 6 5 4 Supplementary functions Set Tare function and Linearization if applicable 8 A Set Up Form is available in the appendix of this manual which may be used for a most convenient and clearly arranged setup p...

Page 30: ...ll change the linear measuring results into a non linear display Parameters P01_x to P16_x select 16 x coordinates representing the display values which the unit would normally show in the display With parameters P01_y to P16_y you can specify now which values you would like to display instead of the corresponding _x values This means e g that the unit will replace the previous P02_x value by the ...

Page 31: ...re signal is proportional to the filling level but not to the filling quantity P01_x P10_x P15_x P16_x Pressure Sensor 0 20 mA P01_x P10_x P16_x P01_y P07_y P15_y P16_y Pressure Volume P15_x P10_y To solve the problem we divide the non linear part of the tank into 14 parts We enter the expected display values of the pressure sensor to registers P01_x to P15 _x For the linear part of the tank it is...

Page 32: ... this the teach function is ready to start How to use the Teach Function Hold down the Cmd key for 3 seconds until the display shows tEACh Now you are in the Teach mode To exit the teach mode again you have the following two possibilities 1 Press the enter key for 2 seconds On the display you will read StOP for a short time and then the unit will switch back to the normal mode 2 Just do nothing Af...

Page 33: ...tion point P02_x The unit will examine the constraint valid for the x values of interpolation points Every interpolation point must be higher than its preceding point Where this constraint is breached all 6 decimal points will blink automatically as a warning Pressing the CMD key will not store the illegal value but result in an error text E r r L O as a warning Once you have reached and stored th...

Page 34: ... of specified range Overflow the analogue input signal is greater than 10 2 V or 20 4 mA Underflow the analogue input signal is lower than 10 2 V or 0 4 mA Any out of range situation will cause a message according the table below Display Input A Input B Underflow o k Overflow o k o k Underflow o k Overflow Underflow Underflow Overflow Underflow Underflow Overflow Overflow Overflow ...

Page 35: ..._e doc Mrz 16 Page 35 38 9 Technical Specifications 9 1 Dimensions 96 0 3 780 110 0 4 331 44 0 1 732 10 0 394 8 0 315 91 0 3 583 9 0 345 129 0 5 079 140 5 5 531 48 0 1 890 Panel cut out 91 x 44 mm 3 583 x 1 732 ...

Page 36: ...its sign Accuracy 0 1 1 digit Switching outputs AX 347 only 2 x PNP max 35 V max 150 mA minimum response time 53 msec Serial interface AX 348 only RS 232 RS 485 600 38 400 bauds Ambient temperature Operation 0 45 32 113 F Storage 25 70 13 158 F Housing Norly UL94 V 0 Display 6 decades LED high efficiency orange 15 mm 0 590 Ambient temperature Operation 0 45 32 113 F Storage 25 70 13 158 F Protecti...

Page 37: ...eristics 1 Switch characteristics 2 Hysteresis 1 Hysteresis 2 Model AX348 Serial unit No Serial format Serial Baud Rate Analogue Inputs Input A Input B Input range Start value End value Decimal point Filter Offset Combined modes A B A B A B AxB Proportional factor Reciprocal factor Additive constant Decimal point Additional parameters Model AX347 Preselection 1 Preselection 2 Model AX348 Serial Ti...

Page 38: ... 16 Page 38 38 Linearization P01_X P01_Y P09_X P09_Y P02_X P02_Y P10_X P10_Y P03_X P03_Y P11_X P11_Y P04_X P04_Y P12_X P12_Y P05_X P05_Y P13_X P13_Y P06_X P06_Y P14_X P14_Y P07_X P07_Y P15_X P15_Y P08_X P08_Y P16_X P16_Y ...

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