All controllers of XR500 series can be connected to XWEB remote through two terminals of RS485 interface. process monitoring system. The external dimension of XR570C is 32×74mm, it is used for medium and low temperature refrigeration system, controller Three-way relay output is used to control compressor, defrost (electrical defrost or hot gas defrost) and Evaporator fan, there are also relays that can be used for alarm or auxiliary output. Two PT1000 or NTC sensor input, one for temperature control and one for evaporator control Defrost termination temperature, two digital inputs (passive contacts) can be set by parameters for their functions Yes, built-in buzzer alarm. Parameters can be set through the keys on the control panel, easily realize various functions. 3. Load Control 3.1 Compressor Control English description in the figure: Temper.: Temperature axis; Time: Time axis; Compr.: Compressor; ON: On machine. The principle of adjusting the temperature is to add a positive temperature difference Hy to the set value of the room temperature Set, and the room temperature sensor When the detected temperature of the detector rises to Set+Hy, the compressor starts, and when it returns to the Set value , the compressor stops running. If the temperature sensor fails, the compressor start and stop times are determined by COn and COF The parameter implements timing start and stop control. 3.2 Quick freezing That is, when the compressor does not stop and does not defrost, it keeps pulling the temperature: press the key to hold It can enter the quick cooling state for about 3 seconds; set the compressor quick cooling cycle through the CCt parameter, To end, press the key again for three seconds. 3.3 Defrost There are three defrosting methods that can be set through the "tdF" parameter: electric defrosting (tdF=rE), hot air defrosting Frost (tdF=in), temperature-controlled defrost (tdF=rt). The defrosting interval is controlled by the "EdF" parameter. Number setting, when EdF=in, defrost every time interval set by “IdF”, EdF=Sd is the smart defrost type when the compressor is running and the evaporator temperature is below "SdF" The time at the temperature set by the parameter is accumulated into the defrost interval "IdF". The dripping time at the end of defrosting is set by the "Fdt" parameter. 3.4 Evaporator Fan Control The fan operation mode is selected by the FnC parameter: FnC=C-n Fan and compressor start and stop at the same time, and stop when defrosting; FnC= O-n The fan keeps working and stops when defrosting; FnC= C-y The fan and the compressor start and stop at the same time, and work during defrosting; FnC=O-y The fan works continuously, even when defrosting. The drain time after defrosting is set by the Fnd parameter, during which the fan stops. When the temperature detected by the evaporator probe is higher than the temperature set by the parameter "FSt", the fan is always turned off close. When the temperature is lower than the temperature set by "FSt", the air circulation in the warehouse is allowed. 4. Control Panel SET : Display and modify the current set value. During the parameter setting process, select the parameter or Confirm the operation. Press this key for 5 seconds to activate the standby function (if allowed by parameter settings). Press this key for 3 seconds, when the stored maximum or minimum temperature is displayed Used to clear history. : Press and hold for 3 seconds to start manual defrost (provided that defrost conditions allow). : Up key to view the maximum temperature; in the parameter setting state, you can browse down the parameter code code or increase the parameter value. Press and hold this key for 3 seconds to activate the quick cooling function. : Down key Down key View the minimum temperature. In the parameter setting state, Parameter codes can be browsed up or the parameter value can be decreased. Press and hold this key for 3 seconds to assist The relay is open or closed (can be set). Group