Altec DC220 Operating Instructions Manual

Temperature differential controller

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ALTEC

Temperature Differential Controller

DC220

Operating Instructions

Table of Contents

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Summary of Contents for Altec DC220

Page 1: Operating Instructions
ALTEC Temperature Differential Controller DC220 Operating Instructions...
Page 2: Table Of Contents
CONTROLLER DC220 ALTEC Table of Contents 1 Introduction ................. 1 2 Features ..................1 3 Type designation................. 4 Mounting ..................2 5 Electrical connection ..............3 6 Front panel layout ............... 4 7 Operation ..................4 8 Controller configuration ..
Page 3: Introduction
CONTROLLER DC220 ALTEC 1 Introduction The DC220 temperature difference controller has dual temperature signal inputs. The controller is idea for temperature differential, pressure differential, solution ratio applications. Especially for central air conditioner control application. 2 Features ● 16-bits high speed A/D converter, high ●...
Page 4: Mounting
CONTROLLER DC220 ALTEC 4 Mounting 4.1 Dimensions Front view Side view 8.8.8.8. 8.8.8.8. RAMP PAR A/M ALTEC DC220 11.5 4.2 Fitting +0.5 -0.0 Mounting screw Panel cut-out Prepare a rectangular cut-out in the panel to the size ● For close mounting shown above.
Page 5: Electrical Connection
CONTROLLER DC220 ALTEC 5 Electrical connection 5.1 Notes on wiring For thermocouples inputs, please connect appropriate compensating cable. For RTD input, the length and gauge of all three wires must be equal. Input wire shall be separated from the power line and load line to avoid electrical noise.
Page 6: Front Panel Layout
CONTROLLER DC220 ALTEC 6 Front panel layout Item Description 8.8.8.8. Indicates the Process Value PV Display and parameters 8.8.8.8. Indicates the setpoint, SV Display manual manipulation output, parameter values, alarms code RAMP Output 1 indicator(green) Output 2 indicator(green) PAR A/M...
Page 7 CONTROLLER DC220 ALTEC 7.2 Setpoint adjusting In automatic control mode, the upper display indicates channel-1 measured temperature(T1) or temperature difference between T1 and T2(dt = T1-T2), the lower display indicates channel-2 measured temperature(T2) or setting value or setting ratio. Press keys ▲ or ▼ to increase or decrease setpoint, keeping it pressed results in a progressively faster variation.
Page 8 CONTROLLER DC220 ALTEC 7.4 Modifying the Operation Parameter When the controller is in the PV/SV displaying status, press PAR key and hold for 3 seconds reveals the first ▲ ▼ parameter. The parameter value can either be modified with the key, or left unmodified.
Page 9: Controller Configuration
ALTEC 8 Controller configuration In order to get the best control performance, DC220 must be set properly. 1) Press PAR key and hold for 3 seconds to enter the 1st level menu(i.e. operation parameter list); 2) Press PAR key to scroll the parameter to LOC and set its value to 808(the initial password);...
Page 10 CONTROLLER DC220 ALTEC Configuration parameter list(continued) Temperature 1 Object of Alarm 1 Temperature 2 Object of Alarm 2 Difference of Temperature K ,AL Full-scale high alarm Full-scale low alarm LOAL ALO1 Alarm 1 High-deviation alarm low-deviation alarm outside deviation band alarm...
Page 11 CONTROLLER DC220 ALTEC 3). Control Algorithm - [TRL There are 2 types of control algorithm can be selected for the controller: ON/OFF and PID. If (TRL=0N.0F, the controller is configured as an ON/OFF controller, the output hysteresis is set using the proportional band(PROP).
Page 12 CONTROLLER DC220 ALTEC 7). Alarms - ALO 1, ALO2, 1AL, 2AL Six different types of alarm can be configured with ALO1 and ALO2 1). Full-scale High Alarm(K ,AL) Alarm operates above an absolute level. 2). Full-scale Low Alarm(LOAL) Alarm operates below an absolute level.
Page 13: Pid Auto-Tuning
CONTROLLER DC220 ALTEC 9 PID Auto-tuning In order to achieve a good control performance, the PID control parameters(PROP INT.T DER T) must be optimized first. The PID auto-tuning function could automatically measure, compute, and set PID constants. Auto-tuning can be activated under the following conditions: ●Automatic operating(closed loop)
Page 14: Linear Input
CONTROLLER DC220 ALTEC 11 Linear input 11.1 Introduction To measure physical quantities such as humidity and pressure or measure temperature by using transmitters, the physical quantities must be converted to analog signals, and set the “input signal” parameter(code: SN) to L,N or .L,N.
Page 15 CONTROLLER DC220 ALTEC 11.3.1 Input 1 Calibration 1). P1 Calibration Step Button Operation Display Connect source.(form signal generator or sensor to input 1 terminals) Apply a signal equal to 4mA. PROC Press PAR key until PROC appears in the upper display...
Page 16 CONTROLLER DC220 ALTEC 11.3.2 Input 2 Calibration 1). C Calibration Step Button Operation Display Connect source.(form signal generator or sensor to input 2 terminals) Apply a signal equal to 4mA. PROC Press PAR key until PROC appears in the upper display...
Page 17: Technical Data
CONTROLLER DC220 ALTEC Technical data Accuracy ±0.2%FS+1 digital Sample rate 125ms Thermocouple: Type J, K, E, R, S, T, B Input RTD: Pt100, Cu50 Analog: 0~20mA, 4~20mA, -10.0~50.0mV, 0~10V Relay, (NO, max.250VAC/3A) Logic, 20V/10mA, Drive SSR Output Analog:0~10mA, 4~20mA, 0~20mA or 0~5V, 1~5V, 0~10V Relay, (NO, max.250VAC/3A)