Drese D800 inverter and a remote pressure gauge how how to set the constant pressure connection
Structure principle:The resistance remote pressure gauge consists of a spring tube, a pressure gauge, a slide wire, a resistance transmitter, etc.. The function of the mechanical part of the pressure gauge is similar to that of the general Bourdon tube pressure gauge. Because the resistance transmitter system is arranged on the gear drive, therefore, when the fan gear shaft gear transmission mechanism of deflection, rotating arm resistance transmitter (brush) corresponding to the deflection due to sliding on the resistor, brush, change makes change transform the measured pressure value of the resistance value, and to two meters, to indicate the value of reading. At the same time, the primary instrument also indicates the corresponding pressure value.Turn left and turn right |?Wiring method:Open the box pressure on the right side of the table, you can see with three terminals 2, 3, 1, three respectively, the corresponding terminal is connected to the inverter control board of the V+, AI, 0V, and 0V in the inverter control board resistor terminal is connected in series with a 400 ohm 2 Watt (due to modifications, far from the pressure gauge can only receive less than 6 volt voltage power supply, and our frequency is 10 volt power supply, so in a series resistor in the circuit).Following chart:Turn left and turn right |The frequency converter is set as an external terminal and the given signal is on the line. Specific requirements, on-site tuning.
To see the resistance type or current type if the resistance type the three wire tap is connected with the analog input quantity in the inverter voltage, is connected to the rest of the 10V, a ground Analog ground. If the constant pressure water supply (gas), the frequency of a given set of PID given to in the PID control parameters which will change into analog voltage control parameters. If it is a total of two line current, a grounding current in the analog input, the other end is connected to simulation, then short circuit analog and digital, parameters are set to PID control, but also in the PID control parameters which will the parameters changed into current analog control.
Main parameter setting: 00-13=1 (PID open); 06-01=1 (PID setting channel equals 0; setting pressure inside 06-03); 06-02=1 (PID feedback channel)
