User manual ALFANET 71 VS-PI Differential
Contents
1. OUTPUT 2xTwisted pair 0 10Vdce shielded 0 5mm Tr N oe N SEEEMIE is 7 r S TN S e it s 9 A Ul 69 5 a 38 Address VDH Products BV Telephone 31 0 50 30 28 900 Produktieweg 1 Fax 31 0 50 30 28 980 9301 ZS Roden Email info vdhproducts nl SS Internet www vdhproducts nl The Netherlands2. User manual ALFANET 71 VS PI OUTI OUT2 ALARM oc Differential Thermostat m pi ALFA71 VDH doc 080702 Version v1 0 Date 22 05 2008 Software 030802_A N 71 VS PI File Do080702 wpd Range 50 50 0 C Installation On the upperside from the ALFANET 71 VS PI is shown how the sensors supply network and both outputs should be connected After power up the a self test is running If the self test is completed the measured differential temperature is shown on the display The ALFANET 71 VS PI can be read out and controlled on the PC Control The ALFANET 71 VS PI thermostat can be controlled by four push buttons on the front SET view change the adjusted value and reset alarm UP raise the adjusted value DOWN lower the adjusted value c hidden key above the SET key Viewing temperatures sensor 1 and sensor 2 Push the UP and DOWN keys simultaneously Release the keys and push the UP key for read out sensor 1 or the DOWN key for sensor 2 A few seconds after releasing the keys the measured differential temperature appears on the display again Viewing delta set point By pushing the SET key the adjusted set point will be visible A few seconds after releasing the SET key the measured differential temperature appears on the display again Changing the delta set point Push the SET key The delta set point appears on the display Release the SET key By pushing the SET key again the set point can be change
3. ara Description Parameter Range Default Meter value Function PI output 1 0 Non 1 PI Cooling 2 PI Heating Function PI output 2 idem Offset temperature sensor 1 sensor 15 0 15 0 C Offset temperature sensor 2 sensor 15 0 15 0 C Offset PI output 1 zone 15 15 C P band output 1 0 1 50 0 C I time output 1 0 99 Minutes Offset PI output 2 zone 15 15 C P band output 2 0 1 50 0 C l time output 2 0 99 Minutes Delay between cooling and heating 0 60 Minutes Minimum adjustable set point 50 0 50 0 C Maximum adjustable set point 50 0 50 0 C Read out above 10 C on whole degrees 0 No 1 Yes Control delay after power failure 0 99 min Forced analogue outputs function at sensor failure 0 No 1 PI Cooling 2 PI Heating Forced percentage 0 100 Network number Software version Production year Production week Serial number x1000 Serial number units Remarks Alarm can only be report through the ALFANET Connections Trafo 3VA 230 12Vac VDH art nr 350 010073 230Vac Dimensions ALFANET 71 VS PI PI 1 Cool ANALOG RS485 REMARK 12Vac inp 12Vac inp Shield only at one side Sensor 2 to earth 2xSM811 POWER TEMP SENSORS SUPPLY 1 Room 12Vac 2 Ceiling Connect a 250 Ohm Resistor between Line A and Line B at both CABLE ENDS of RS485 Network 2 wire with shield NETWORK
4. ased with 2 C Error codes On the display from the ALFANET 71 VS PI can appear the following error codes E1 Sensor 1 defect Solution E1 E2 E2 Sensor 2 defect Check if the sensor is connected well Check the sensor 10000 25 C Replace the sensor L L Incase of a sensor short circuit the display alternates between error code E and L left for sensor 1 and right for sensor 2 H H_ In case of open circuit sensor the display alternates between error code E en H left for sensor 1 and right for sensor 2 EEE Adjustments are lost Solution EEE Reprogram the adjustments If an error code appears it can be reset with the SET key Technical details Type ALFANET 71 VS PI Thermostat Range 50 50 0 C above 10 C read out per 0 1 C Supply 12Vac 50 60Hz 5 10 Read out 3 digit 7 segments display Communication RS485 network 2xTwisted pair shielded min 0 5mm Control Through push buttons on the front Front Polycarbonate IP65 Sensor SM 811 2m PTC 10000 25 C Analogue outputs Pl 1 Cooling 0 10Vdc PI output Pl 2 Heating 0 10Vdc PI output Dimension 35 x 77 x 71 5mm h w d Panel cut out 28 x 70mm h w Accuracy 0 5 from the range Provided with memory protection during power failure Equipped with self test function and sensor failure detection Connection with screw terminals Special version on request available Parameters ALFANET 71 VS PI P
5. d with the UP or DOWN keys A few seconds after releasing the keys the measured differential temperature appears on the display again The Delta set point is adjustable from 20 0 till 20 0 C Status from the outputs Push the hidden C key The display shows PI By pushing the UP key the output percentage from output 1 becomes visible from 0 100 If the DOWN key is pushed the output percentage from output 2 becomes visible from 0 100 A few seconds after releasing the keys the measured differential temperature appears on the display again Adjusting internal parameters Next to the adjustment of the set point some internal settings can be made like P band I time sensor adjustments and set point range By pushing the DOWN key for more than 10 seconds you enter the internal programming menu On the left display the upper and the lower segments are flashing Over the UP and DOWN keys the required parameter can be selected see table for the parameters If the required parameter is selected the value can be read out by pushing the SET key Pushing the UP and DOWN keys allows you to change the value of this parameter If no key is pushed for 20 seconds the ALFANET 71 VS PI changes to it s normal operation mode Afregeling voeler The sensors can be adjusted with the Sensor Offset parameter 05 sensor 1 and parameter 06 sensor 2 Indicates a sensor e g 2 C too much the according Sensor offset parameter has to be decre
Download Pdf Manuals
Related Search