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Safety Instructions This manual is an essential part of the unit and contains important hints about function, correct handling and commissioning.
1. 2. 3. 4. Table of Contents Introduction..........................................................................................................................................4 Terminal Assignments .........................................................................................................................5 2.1. Power supply ................................................................................................................................6 2.2. Aux. voltage output ..........
1. Introduction Some of the general demands to an up-to-date process controller for automation industry are always high flexibility, combined with easy and simple operability. Many applications require two separate analogue inputs for use with single or combined operation. Also it may be important to display and evaluate both, linear and non-linear analogue inputs at an acceptable accuracy, which requires programmable linearization functions.
2. Terminal Assignments GND 230VAC 115 VAC 0 VAC AX 345: Basic model GND 230VAC 115 VAC 0 VAC AX 347: Model with two presets and optocoupler outputs optional, see *) PE GND 17-30V DC in Input A Input B AGND GND +24V DC out n.c. n.c. n.c.
When using the earthing option, please be aware that all terminals marked GND or AGND will be earthed. Multiple earthing on different positions of an installation may cause problems, especially with poor overall performance of the whole earthing and screening system! The minus potential of analogue inputs is internally connected to the minus of the DC supply.
2.4. Optocoupler transistor outputs (model AX 347 only) The outputs provide programmable switching characteristics and are potential-free. 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. Preset2 Opto AX34509b_e.doc / Feb-13 Preset1 Opto 33 R 33 R (8) Com+ (5 ...
2.5. Serial RS232 / RS485 interface (AX 348 only) Ex factory the unit is set to RS232 communication. This setting can be changed to RS485 (2-wire) by means of an internal DIL switch. To access the DIL switch, you must remove the screw terminal connectors and the backplane. Then pull the board to the rear to remove the PCB from the housing.
3. Jumper settings When your input signal is a current of 0-20 mA or 4-20 mA, there is no need to change jumper settings and you can skip this section. Where however you intend to use one or both inputs for voltage signals, you must change the internal jumper settings correspondingly.
Current inputs are automatically scaled to an input range of 0/4 – 20 mA. Voltage inputs use the standard range of +/- 10V. You are free to measure voltages up to 120 volts DC by use of a remote resistance in series to the input line (please observe applicable safety standards!).
4. How to Operate the Keys The unit uses 3 front keys for all setup operations. Subsequently, the key functions will be named as shown in the table below. ENTER SET Cmd (Command) The functions of the keys are depending on the actual operating state of the unit. The following three operating states apply: Normal display state Setup state a.) Basic setup b.) Operational parameter setup Teach operation 4.1.
4.2. Parameter settings 4.2.1. How to select a parameter The ENTER key will scroll through the menu. The SET key allows to select the corresponding item and to change the setting or the numeric value. After this, the selection can be stored by ENTER again, which automatically changes over to the next menu item. 4.2.2. How to change parameter settings With numerical entries, at first the lowest digit will blink.
4.3. Teach operation The Time-out function will be switched off during all Teach operations Key Function ENTER will conclude or abort any Teach operation in progress SET function is fully similar to normal set-up operation Cmd will store the display value to the register and will change over to the next interpolation point. For details of the Teach procedure see section 8.3. 4.4. Set all parameters to “Default“ At any time you can return all settings to the factory default values.
5. The Parameter Menu The menu provides one section with “basic parameters” and another section with “operational parameters”. On the display you will only find those parameters which have been enabled by the basic settings. E.g. when the Linearization Functions have been disabled in the basic set-up, the associated linearization parameters will also not appear in the parameter menu. All parameters, as good as possible, are designated by text fragments.
Operational Parameters Single Mode „inPutA" „StArtA" „End A" „dPoi A" „FiLt A" "OFFS A" *) Dual Mode „PrES 1" (AX 347 only) „PrES 2" (AX 347 only) „inPutA" „StArtA" „End A" „dPoi A" „FiLt A" "OFFS A" *) „inPutb" „StArtb" „End b" „dPoi b" „FiLt b" OFFS b" *) Combined Modes „inPutA" „StArtA" „End A" „dPoi A" „FiLt A" „inPutb" „StArtb" „End b" „dPoi b" „FiLt 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 " **)
6. Setting of Parameters 6.1. Basic Parameters In general, the parameters described subsequently must be set with the very first commissioning of the unit only. For best comprehensibility, this section describes setup of all display functions only as needed for model AX 345, and settings applicable to preselections and switching outputs of AX 347 are described separately.
Menu Text Default Command key enable The Command key is switched off and no Offset values will appear in the menu The Cmd key will execute the Tare/Offset function The Cmd key will execute 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.
6.3. Modes of operation 6.3.1. Single mode (input A only) Menu Text Setting Range Default Start value A Value which the unit will display with a zero input signal of 0 volts or 0/4 mA -99999 … 99999 0 End value A Value which the unit will display with a full scale input of 10 volts or 20 mA -99999 … 99999 1000 Input A range Set the desired range for input A Voltage +/-10V Current 0-20 mA Current 4-20 mA Decimal point for signal A 00000.
6.3.2. Dual Mode (Inputs A and B separately) A B With this mode, the SET key selects between display of channel A and display of channel B, and the bar of the high order LED indicates which of the two channels is actually in display.
6.3.3. Combined Modes [A + B], [A - B], [A : B], [A x B] These modes allow displaying either the single channels A and B or the calculated result according to the selected combination. The SET key allows scrolling between the three displays. A The upper bar of the high order digit indicates that you display channel A. B The lower bar of the high order digit indicates channel B. When no bar is lit, the display shows the result of the calculation, according to the combination set.
6.4. Additional settings for the Preselections (model AX 347 only) 6.4.1.
Menu Text Setting Range Default 0 … 99999 0 0 … 99999 0 Output 2 switching characteristics See above See above See above See above Output is statically active when the display reaches the value of Preset 1 – Preset 2 *) Output is dynamically active when the display reaches the value of Preset 1 – Preset 2 *) Switching Hysteresis 1 Programmable Hysteresis for output 1 Switching Hysteresis 2 *) Programmable Hysteresis for output 2 Serves to generate an anticipation signal at a fixed distance to the
6.4.3. Operational settings for presets: The settings for the Preselection values appear at the beginning of the operational parameters: Menu Text Setting Range Default Preselection 1 -99999 … 99999 10000 Preselection 2 -99999 … 99999 5000 6.4.4. 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.
When Preset 1 is used to monitor a minimum value with setting “LE”, and Preset 2 is used to monitor a maximum value with setting “GE”, then output 1 will operate with an Automatic Startup-Inhibit, i.e. it will become enabled only after the measuring value has crossed the minimum setting the first time. Where no startup-Inhibit is desired, please use Preset 1 for Maximum and Preset 2 for Minimum control. 6.4.5.
6.5. Additional Parameters for the Serial Interface (model AX 348 only) 6.5.1. Communication settings in the Basic Menu: Menu Unit Number Setting Range Default 0..99 11 You can assign any unit number between 11 and 99. The address must however not contain a “0“ because such numbers are reserved for collective addressing of several units. 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.
6.5.2. Operational Parameters for configuration of the interface: Menu Serial Timer: Setting 0,000 allows manual activation of a serial data transmission at any time. All other settings specify the cycle time for automatic transmission, when the interface is set to "Printer Mode" Setting Range Default 0,000 0,100 sec 0,010 sec … 9.999 sec Between two transmission cycles the unit will allow a pause depending on the baud rate. The minimum cycle times for timer transmissions are shown in the table.
6.5.3. PC-Mode Communication with PC - Mode allows free readout of all parameters and registers of the unit. The subsequent example shows the details of communication for serial readout of the actual display value.
6.5.4. Printer Mode The Printer Mode allows cyclic or manual activation of transmissions of the specified register data. The corresponding register can be specified by means of parameter „S-Code“.
7. Commissioning Commissioning of this unit is easy and uncomplicated when following the subsequent steps: 1 2 Step Analogue inputs Basic settings 3 Parameter settings Action Set jumpers Select Operation mode Keep linearization and Tare function off firstly Configuration of the analogue inputs, scaling of the display Select combination and final scaling See section 3 6.1 6.1 6.3.1 and 6.3.2 6.3.3 (if applicable) Configuration of switching outputs (AX 347) 6.
8. Special Functions 8.1. Tare / Offset function This function will become active after the “Cmd” parameter has been set to “oFFSEt” or to “both”(see 6.1). As a result, every touch of the “Cmd” key will store the actual display value to the Offset register, resulting in a Zero display with the actual input signal. 8.2. Linearization This function allows converting non-linear input signals into a linear presentation or vice-versa.
y y P1(x)= -1000 P1(y)= 900 P8(x)= 0 P8(y)= 750 P16(x)= 1000 P16(y)= 800 x x P16(x)= +1000 P16(y)= - 600 P1(x)= 0 P1(y)= 0 Linearisation Mode = 1_quA *) Linearisation Mode = 4_quA Application Example: We like to display the filling quantity (volume) of a tank as shown below, with use of a pressure sensor mounted to the bottom of the tank. With this application the analogue pressure signal is proportional to the filling level, but not to the filling quantity.
8.3. Manual input or „Teaching“ of the interpolation points Interpolation points to form the linearization curve can be entered one after another, using the same procedure as for all other numeric parameters. This means you will enter all parameters P01_x to P16_x and P01_y to P16_y manually by keypad. During manual input of interpolation points the unit will not examine the settings P01_x to P16_x. Therefore the operator is responsible to observe the constraint P01_X < P02_X < … < P15_X < P16_X.
When you read the x-value of your first interpolation point in the display, press “Cmd” again. This will automatically store the actual display value to the P01_x register, and for about 1 second you will read “P01_y “ on the display, followed again by the same reading stored previously. This display value now can be edited to the desired P01_y value, like a regular parameter When you read the desired P01_y value in your display, store it by pressing “Cmd” again.
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 AX34509b_e.doc / Feb-13 Input A Underflow Input B o.k Overflow o.k o.k Underflow o.
9. Technical Specifications 9.1. Dimensions 110,0 (4.331’’) 91,0 (3.583) 48,0 (1.890) 10,0 (.394) 44,0 (1.732) 8,0 (.315) 96,0 (3.780’’) 9,0 (.345) 129,0 (5.079) 140,5 (5.531) Panel cut out: 91 x 44 mm (3.583 x 1.732’’) AX34509b_e.
9.2. Technical data Power supply AC : 115/230 V (+/- 12,5 %), 7,5 VA Power supply DC : 24 V (17 – 30 V), approx. 100 mA (without aux. sensor supply) Ripple : ≤ 10% @ 24VDC Total AC power DC current consumption : 7,5 VA : 18 V : 110 mA, 24 V : 90 mA, 30 V : 80 mA Aux. output for sensors : 24 V DC, +/- 15%, 100 mA (with AC and DC power input) Inputs : 2 analogue inputs (+/-10 V, 0 ... +20 mA, 4 ...
9.3. Commissioning Form Date: Operator: Software: Serial No.: Basic Settings: Operating mode: Brightness: Display Update [sec]: Code: Linearization: Cmd key command: Model AX347 Source 1: Switch characteristics 1: Hysteresis 1: Source 2: Switch characteristics 2: Hysteresis 2: Model AX348 Serial unit No.
Linearization: P01_X: P02_X: P03_X: P04_X: P05_X: P06_X: P07_X: P08_X: AX34509b_e.
