User manual CARLO GAVAZZI WM23-96 PROGRAMMING

[. . . ] CARLO GAVAZZI Automation Components WM23-96 Power Quality Analyzer Analizzatore di Qualità della Rete USER MANUAL MANUALE ISTRUZIONI Modular system Tecnologia modulare CARLO GAVAZZI Automation Components WM23-96: Power Quality Analyzer Plug and play module system; Harmonic analysis; Wmax and PFmin storage. These are only a few among many other functions performed by your WM23-96. What's more, Carlo Gavazzi means ISO9001 certification, a working experience of many decades and a widespread presence all over the world. All this because we want our customers to have the top service and the top products. [. . . ] nE: normally energized output when there is no alarm. Select the output status by means of the v and w keys and confirm it with S ; SEC: delay time at the activation of the alarm output. Choose the value of the delay time in seconds by means of the v and w keys (up to 255 seconds) and confirm with S . S v 1. 2. . . . 2. 1 w S vw S v 1. 2. . By increasing the value both the stability and the settling time of the measurements are increased. See also "Example 2" in Useful Information on page 19. s End of programming S Use it to exit from programming and go back to the measuring mode. Select "End" from the main menu by means of the w and v keys, conInstrument firm it with S . revision To measuring mode Synchronization Useful information v 11 7 17 18 v Programming s Reset of min values 17 Select "rESEt MI" from the main menu by means of the v w keys, S S then confirm with S . When the instrument asks for the reset, choose, by means of the v w keys: "no MI" to avoid the reset or "YES MI" to confirm it. Then, press S to carry out the command. S vw RESET s Reset of max values S Select "rESEt MA" from the main menu by means of the v w keys, S then confirm with S . When the instrument asks for the reset, choose, by means of the v w keys: "no MA" to avoid the reset or "yes MA" to confirm it. Then, press S to carry out the command. S vw RESET Serial port Up/down alarm v 15 7 21 v 18 Useful Information It is possible to prevent any access to programming by keypad by modifying the selector under the power supply slot (see the drawing on the left), or closing the contact number 1 of the digital input module, when present. s How to prevent the programming by key-pad Selector: turn the selector with a little screwdriver. The variables measured by the instrument are correct if the polarities of the inputs have been observed (as shown in the figure below); if not, measuring and retransmission errors may occur due to the wrong direction of the current flowing in the primary / secondary of the connected current transformer. s Setting Examples Example 1 "Analogue output": take the measure of a power consumed up to 100kW, and retransmit it with a signal from 4 to 20 mA; the module to be used is AO1050 or AO1026 (single or dual output from 0 to 20mA), the instrument must be set as follows: · VAr: (variable), W (system active power) · LoE: (minimum electrical scale) 0. 0 K; the K and M mulDigital outputs What's ASY v 13 21 20 v Useful Information 19 tiples are automatically selected by the instrument according to the selected VT and CT values; · HiE: (maximum electrical scale) 100. 0 K; the K and M multiples are automatically selected by the instrument according to the selected VT and CT values; · LoA: (minimum electrical scale of the analogue output) 20. 0% for 4mA, the calculation to be carried out is: (minimum output value/ full scale output value)*100 = (4mA/20mA)*100 = 20% · HiA: (maximum electrical scale of the analogue output) 100. 0% for 20mA, the calculation to be carried out is: (maximum output value / full scale output value)*100 = (20mA/20mA)*100 =100% Example 2 "Use of digital filter": it's necessary to stabilize the displayed value of the VL1-N variable that varies between 222V and 228V. The parameters of the digital filter are to be set as follows: · rnG: the variable varies within the average value, the amplitude of which is equal to ±1. 3% of the variable's rated value, calculated as follows: (228-222)/2=±3V, then ±3*100/231V=±1. 3% where 231V is the phase-neutral rated value of a 400V input range). The "range" parameter, that corresponds to the action range of the digital filter, is set at a value which is slightly higher than the percentage amplitude of the fluctuation: e. g. · CoE: if the new value acquired by the instrument is within the filter's action range, then the new displayed value is calculated by summing algebraically to the previous value the variation divided by the filtering coefficient. As a consequence, a value which is higher than this coefficient implies a longer settling time and therefore improves the stability. The latter can also be improved by increasing the filtering coefficient: the admitted values are within 1 and 16. Enter the value in consecutive attempts until you reach the desired stability. Reset min and max values Mounting v 17 18 21 23 v 20 Useful Information s What is ASY The ASY variable allows the user to control the symmetry of the delta voltages (for systems without neutral) and star voltages (for systems with neutral). The variable is calculated according to the following formula: ASY= Where: Vmax - Vmin Vavg *100 Vmax is the max. value among VL1-N, VL2-N, VL3-N Vmin is the min. [. . . ] distance 1200m, termination directly on the instrument Addresses: 1 to 255, selectable by key-pad Protocol: MODBUS/JBUS (RTU) Data (bidirectional): Dynamic (reading only): system and phase variables Static (reading/writing): all the configuration parameters, activation of the static output. Data format: 1 start bit, 8 data bit, no parity, 1 stop bit Baud-rate: 9600 bit/s. Insulation: by means of optocouplers, 4000 VRMS output to measuring input, 4000 VRMS output to power supply input RS232 (on request) - module AR1039 bidirectional (static and dynamic variables) Connections: 3 wires, max. distance 15m, Data format: 1 start bit, 8 data bit, no parity, 1 stop bit Baud-rate: 9600 bauds Protocol: MODBUS/JBUS (RTU) Digital outputs (on request) AO1059/AO1036 module To be used as alarm or remote control. [. . . ]