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1. 2 9 3 INSTALLATION OF EPROM 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o oo 0 oo 0 o o o 0 0 o o o o o o o o oo o o o o o o o o o 0 oo o o o o oo 0 o o o o o 0 o oo o o o o 0 o o o o o o 0 0 0 o 0 0 0 0 0 0 0 0 0 00000 0 0000000000000 28 CONNECTION OF THE OPTIONAL BOARDS 52525 535552535255 2535255525302 002 002 0 2 002 6 02 0002 0 0550 52 902 900505 20 10 1 SERIAL PRINTER 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 o 0 o 0 0 0 o 0 o 0 oo o o o 0 o o o o ooo o o o o o 0 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000000 o oo 28 10 2 CLOCK BOARD PO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 o 0 0 0 0 0 o 0 0 o o 0 0 o o o 0 o o 0 0 o o o 0 0 0 o 0 0 o o 0 o o oo o o 0 o o o 0 o o o 0 0 o 0 0 0 0 0 0 o 0 0 o o 0 o o 0 0 o o o 0 o 0 o 0 0 o 0 0 0 0 o 0 o o oo o o o o oo o o o o oo o oo 28 USEFUL ADVICE FOR A CORRECT INSTALLATION 29 APPENDIX A TROUBLESHOOTING eese ease eee ea aka eua eae Neu E eR ERN ERR ERE APPENDIX C EXAMPLES
2. 55959595 Ee S ee 52 APPENDIX D MATERIALS AND CODES pCO Stage Controller 1 DETAILS OF THE PROGRAMME The programme allows full management of a refrigerator plant The characteristics of the system are as follows display and control of the measured quantities possible configuration of the number and type of control devices display of alarms activated by the LED display and their audible signals by means of a buzzer programming of the configuration parameters and of some operative parameters with access protected by a password modification of the basic operation parameters setpoints differentials alarm thresholds timing LED display of the active functions print of the alarms picked up and at intervals the state of the main variables of the machine time band programming makes it possible to operate the devices controlled by the probe 1 from a second setpoint secondary so as to save energy during the programmed hours and days connection with a supervisory remote controlled maintenance serial line according to the RS422 RS485 standard and the Carel s communication system 2 USER INTERFACE 2 1 Terminal unit front panel view with front door closed 3 Figure 1 references External function indicator LEDS External rubber buttons LED display Front windows Sag COC OO Fig 1 2 22 Silicone rubber external button
3. e o D D O O enabling of fan inveter alarm delay of low pressure flow regulator only if P4 gt 0 and or P27 gt 0 37 enabling of self starting procedure type of cooling gas refrigerant cod Carel 030221891 rel 1 0 25 07 00 9 pCO Stage Controller Las printer enabling identification number P39 NENNEN P40 PH i P42 88 5 ww 44 NEN P45 time delay at the intervention of alarm relay P46 po P61 HENRI P62 a automatic or manual reset alarms 0 gt autom 1 gt manual enabling OFF key 0 disable 1 enable serial communication baud rate 01200 12400 24800 39600 4 gt 19200 circuit 1 devices switch off mode 0 full 1 partial cold warm 0 6cold 1 warm Info button Code Description Unit of measure programme version p cod Carel 030221891 rel 1 0 25 07 00 10 pCO Stage Controller 4 ALARM DESCRIPTION How to manage the Alarms you have to refer to the parameter P44 at page 18 Alarm button Cod Description Exceeded threshold of the device 1 operation hours Exceeded threshold of the device 2 operation hours Exceeded threshold of the device 3 operation hours Exceeded threshold of the device 4 operation hours Exceeded threshold of the device 5 operation hours Exceeded threshold of the device 6 operation hours Threshold and hour number Exceeded threshold of the device 8 operation hours Exceeded threshold of the device 9 operation ho
4. pCO Stage Controller C21 beginning of the time band exclusion The beginning time of time band exclusion with secondary set is required see parameter C20 C22 end of the time band exclusion The ending time of the time band exclusion with secondary set is required see parameter C20 Caution do no enable at the same time the bands with reduced setpoint and the regulation of the setpoint from analogic setpoint because both options have priority over the selected setpoint St3 St5 minimum setpoint Establish the minimum value that can be selected for the setpoint The use of this parameter does not allow the end to select a probe 1 setpoint lower than the value indicated by St3 and a probe 2 setpoint lower than the value indicated by St5 St4 St6 maximum setpoint Establishes the maximum value that can be selected for the setpoint The use of this parameter does not allow the end to select a probe 1 setpoint higher than the value indicated by St4 and a probe 2 setpoint higher than the value indicated by St6 St7 secondary setpoint Allows to select the secondary setpoint that is valid when the time bands are enabled d1 d2 device differentials These parameters establish the values of the differentials of the devices managed by the probe 1 and 2 inverters excluded setpoint differential Fig 5 d3 d4 inverter differentials Differential in addition to the active setpoint of the relevant circuit represents the
5. 01 1501 oT display of the state ofthe fan invete T 05100 o2 display of the state of the device 0 00 state of the device 1 0 off 1 state of the device 2 O off 1 on gt state the device state of the device 4 state of the device 5 state of the device 6 state of the device 7 state of the device 8 state of the device 9 0 state of the device 10 Clock button measure hour display only if P41 1 minute display only if P41 1 min day display only if P41 1 month display only if P41 1 0 1 gt on 0 gt off 1 gt on 0 gt off 1 gt on 0 1 gt on 0 1 gt on 0 1 gt on 0 gt off 1 gt on 0 gt off 1 gt on NI O O CID N SC password that allows the access to the subsequent param only if P41 1 hour selection only if P41 1 h minute selection only if P41 1 day selection only if P41 1 2 month selection only if P41 1 NEED min Gawa a n year display only if P41 1 ERE Huc Li cod Carel 030221891 rel 1 0 25 07 00 7 pCO Stage Controller year selection only if P41 1 0 099 14 C11 range beginning hour with secondary set only if P41 1 lO 10 3 h C12 range end hour with secondary set only if P41 1 24 0 24 h C13 Sunday with secondary set only
6. 15 pCO Stage Controller P16 P31 integration time Indicate the time of integration when a Proportional Integral type of control has been chosen P15 1 and P30 1 P17 P32 time between requests of switch on The two parameters allow respectively the selection of time between the successive requests of switch on of the devices controlled by the probe 1 and 2 These parameters are present only if the control of the devices is of neutral zone type P18 P33 time between turn off requests The two parameters allow respectively the selection of time between the successive requests of turn Off of the devices controlled by the probe 1 and 2 These parameters are present only if the control of the devices is of the neutral zone type P19 selection of the device rotation This parameter allows you select the rotation type 0 disabled rotation the last IN is the first OFF 1 FIFO rotation the first IN is the first OFF the devices switch off in starting order 2 time rotation the first ON device is the one with the lower operation time the first OFF device is the one with the higher operation time P20 selection of the device no 1 valve inverter Enables the presence of the inverter on the device no 1 controlled by the probe 1 or of a 0 10 volt valve depending on the presence of neutral zone or lateral band regulation The parameter is displayed only if P120 and P4 gt 0 and if the functions Number of circuit 1 voltage co
7. 6 digit LED PCOTO1SL60 Telephone connector 1 5m long S90CONNO00O Clock board CLK0000000 EPROM with programme EPSTDIIUOA Optional Serial board PCOSER0000 Serial board PCOSER4850 Carel reserves the right to modify its products without prior notice cod Carel 030221891 rel 1 0 25 07 00 35 Note CARE Technology amp Evolution CAREL srl Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fax 39 049 9716600 http www carel com e mail carel carel com Agenzia Agency cod 030221891 rel 1 0 del 25 07 00
8. the parameter P21 equals 1 The table shows some analog inspect resistive values ohm to be given to obtain the respective values in bar in C or in F depending on the unit of measure of choice bar C F bar C F bar C F 67 71 0 27 28 12 09 53 39 22 05 10 00 42 25 17 96 33 89 14 68 P22 enabling of the probe of the external air see figure 30 This parameter enables the presence of a temperature probe of the external air and also allows to compensate the probe 1 set point This parameter is present only if the probe 1 measures the temperature P23 enabling of the probe 1 compensation If the parameter P22 is active P2221 then it is possible to enable the procedure of compensation cooling or er This procedure allows the setpoint variation of the primary circuit according to the values read by the external air temperature probe More precisely a proportional quantity is added or deducted to the setpoint of the primary circuit according to the selected compensation delta and with variation of the external air temperature between two values set by a setpoint and a compensation differential The maximum value that can be added or deducted to the setpoint of the primary circuit is the same as the compensation delta see fig below setpoint circuit 1 delta compensation external air ifferential compensation temperature setpoint compensation Fig 15 P27 number of probe 2 devices This p
9. variations see explanation 03 logic of voltage variations only if P120 and P4 gt 0 and 6 gt 0 0 14n deen n minimum time between compressor starting and voltage Sec variations only if P120 and P420 and P6 gt 0 P9 activation of volt Variations only if P1 gt 0 and P4 gt 0 and P6 gt 0 0 0 1 partial P10 tum on minim time of the probe 1 devices only t P10 and 60 0 990 se Pii turning off minim Time ofthe probe 1 devices only i Pi 0andP4 gt 0 120 sec P12 min ime between probe 1 device turning on only if Pi gt 0 and iai minimum time between probe 1 same device turning on Anti 360 Sec court cycle only if P120 and P420 RR O E RN OO only if P120 and P4 gt 0 1 lat band P15 type of regula ofthe probe i ony i PisOandPasOand 0 03P t2P4 P16 integrat time of the primary circuit only i Pi gt 0 and P40 andPi5 1 600 300 000 se P17 time between turning on requests of the probe 1 devices only if sec P1 gt 0 and P4 gt 0 and P14 0 1 0 disabled 1 FIFO 2 time O disable 1 enable O disable 1 enable time between turning off requirements of the probe 1 devices only if P1 gt 0 and P4 gt 0 and P14 0 ices rotation enabling of the probe 1 devices only if P120 and P421 NEN Cs E Nu a E inverter enabling of the de
10. 5 compressors e 5 fans e 1 compressor inverter e 2pressure probes POWER SUPPLY AND ANALOG OUTPUTS ANALOG INPUTS DIGITAL OUTPUTS E N DIGITAL INPUTS 24 1 220V INPUTS OUTPUTS compressor lock device General alarm fan lock device general how pressure switch CINV Compressor inverter output 0 10 volts valve PP pressure probe cod Carel 030221891 rel 1 0 25 07 00 32 pCO Stage Controller Refrigerator unit consisting of 3 compressors e 2 pressure probes e fans inverter POWER SUPPLY AND ANALOG OUTPUS ANALOG INPUTS DIGITAL OUTPUTS DIGITAL INPUTS INPUTS OUTPUTS Compressor lock device BFINV fans inverter lock device general high pressure switch FINV inverter output 0 10 volts or RGF C AR EL general low pressure switch oe PP pressure probe cod Carel 030221891 rel 1 0 25 07 00 33 pCO Stage Controller Chiller unit consisting of e 5 Compressors e 2 temperature probes e 1 Stage of voltage control for comp e 7 External air temperature probe e remote On Off from analog input compensation POWER SUPPLY ANALOG INPUTS DIGITAL OUTPUTS x e c12 nos cs_ nos 3 S pane co du X l NO CMP3 P1C2 dE P1C1 DIGITAL INPUTS 220V FLX INPUTS OUTPUTS On Off remote input First stage of voltage control F amb
11. LED On LED 5 On LED gt no device managed by the probe 1 is active at least one device managed by the probe 2 is active no LED managed by the probe 2 is active night setpoint is active Sepoint 2 indicates that the setpoint variation is coming from an analog input external setpoint indicates that the communication with the supervisory network is active The 6 LEDs placed in the display indicate the unit of measure of the values detected by the two linked probes selections made in the programming code branch barpressure C im temperature in degrees Fahrenheit Obviously only one of the 3 indicated LEDs can be on cod Carel 030221891 rel 1 0 25 07 00 5 pCO Stage Controller 3 LISTOF PARAMETERS All the bold faced parameters are described from page 12 on On the following tables there are two Default columns on the right one there are the factory set parameters decided by the arel engineerings see on page 21 On the left one the user may write its own O Maintenance button A EN lt Code Units of measure Description Default Rating 0 999999 0 999999 0 999999 0 999999 0 999999 0 999999 0 999999 0 999999 0 999999 0 999999 0 999999 device 1 operating hour display only if device 1 is enabled device 2 operating hour display only if device 2 is enabled device 3 operating hour display only if device 3 is enabled device 4 operating hour display only if device 4
12. Separate the digital input power supply from the power supply of the pCO 7 Do not fix the cables to the terminals of the PCOB B boards pushing excessively on the terminal itself thus bending the pCO board 12 APPENDIX A TROUBLESHOOTING The unit does not start the mains presence LED on the main board is off the LCD is off the other LEDs are off Check a the mains b that after the 230V 240V power transformer there are 24V c that the 24V power connector has been correctly plugged in d the fuse of protection Fig on page 18 e the proper connection between the terminal unit if present and the main board At the start up one of the following conditions occur alarm LED indicator ON no messages or random messages on the LCD buzzer ON Check a EPROM polarity see Fig b the pins of the EPROM do not bend them when inserting the EPROM into its socket c the microprocessor chip if damaged call the Maintenance Service Wrong input signal reading Check a the probe connection b the distance of the cables carrying the probe signals from possible noise sources e g power cables contactors high voltage cables and cables with devices that are connected with high absorption at starting C input calibration by program d the proper power supply to the main board and the probes e the separation of the power supply of the digital inputs from the power supply of the pCO EEprom failure
13. The hardware architecture is as follows 1 User TERMINAL unit with keypad display and LEDs The connection of the user terminal unit to the main board is not necessary for the controller operation it can be used for the initial programming of the main parameters 2 A MAIN BOARD with a unit set to be connected to the controlled devices 3 Connection cable between the terminal unit and the main board 4 Connection cable between the terminal unit and the serial printer to be provided by the customer 5 Serial printer to be provided by the customer cod Carel 030221891 rel 1 0 25 07 00 21 62 Main board layout VGO VGI Y YO ID11 220Vac ID11 24Vac qn ID11 Com ID12 Com ID12 24Vac ID12 220Vac NOI 1 O JL LL 9 Fa L J s m H NU NW t Bs Fig 18 pCO Stage Controller The main board code PCOB000 is the basic core of the controller and includes 4 different areas e microprocessor and memories of the unit e terminal blocks necessary to interface the pCO to the controlled devices e connectors necessary to interface pCO to the remote terminal unit to the real time clock board and to the local and supervisory network cod Carel 030221891 rel 1 0 25 07 00 22 pCO Stage Controller Fig 18 references page 22 Po
14. alarm a Contact the Maintenance Service cod Carel 030221891 rel 1 0 25 07 00 29 pCO Stage Controller Uncertain alarm signal from digital input Check a the input alarm signal detect voltage between the C common terminal and the digital input terminal indicating the Cn alarm If voltage is present 24V or V according to the power supply being used for the digital inputs the contact of the connected alarm device is closed If voltage is OV or OV see above the contact is open If not differently stated the controller gives alarm whenever the contacts are open Wrong reading of the input signals Check a the probe connection see page 26 and following b the distance of the probe cables from possible electromagnetic noise sources e g power cables contactors high voltage cables and cables connected to high absorption at starting C the presence of a high thermic resistence between the sensor and the probe socket If required add some paste or conductive oil to the sockets d in case of probe error or conversion error of the pCO the verifications depend on the type of probe Active temperature humidity probes with 1V 1V 1V1V_ signal measure the probe signal between the terminals Bn and AVSS with a voltmeter The correspondence between voltage and value should be 10 mV every C 20 RH For example when reading 230 mV 0 2 V the probe sends out a signal corresponding to 20 C 20 RH using th
15. ar transmitting antennas e pCO exposure to direct solar irradiation and weathering A wrong power supply connection can seriously damage the system 1 Use a proper cable lug Screw down every screw and push the cable lug through it and then fasten the screw Afterwards tighten slightly the wire to be sure it has been properly fastened 2 Keepthe cables of the probe signals and of the digital inputs as fare as possible from power cables and inductive loads in order to avoid possible electromagnetic noises Do not put into the same cable ducts the ones of the electric cables included power cables and probe cables Do not install the probe cables immediately near power devices magnetothermic contactor etc Reduce as far as possible the route of the sensor cables and avoid spiral shaped routes that go round power devices Use screened cables to correct the probes min dia being 0 5mm 3 Do not touch the board electronic components to avoid electrostatic charges extremely dangerous from the operator to the components see notes on page 30 4 the transformer secondary is grounded check that the ground cable itself corresponds to the cable arriving to the controller and reaching the terminal GO 5 To mount the board inside the electrical panel use the 6 metallic mounting hardware supplied with the board connecting them to the main electrical panel earth Metallic mounting hardware must be fixed to the metallic holes on the board 6
16. arameter allows to set the number of devices controlled by the probe 2 The devices can range from 0 to 11 but this parameter depends also on the number of devices controlled by the probe 1 parameter P4 This mean that if no device controlled by the probe 1 is connected the devices controlled by the probe 2 can be 11 at most but if the devices controlled by the probe 1 are 11 no device can be controlled by the probe 2 P34 device rotation selection The parameter allows you to enable the rotation of the devices being controlled by the probe 2 The rotation being implemented is of the FIFO type the first ON is the first OFF P35 enabling of fan inverter The fan inverter can be enabled by this parameter Enabling the control of fan inverter involves the selection of a setpoint inverter 512 and a differential inverter d4 When the value detected by the probe 2 is less than or the same as the value of the setpoint inverter the output dedicated to this device shows 0 volts As the value detected by the probe 2 deviates from the setpoint inverter the analog output increases in proportion to the deviation until it reaches the value of 10 volts when the measured value is equal to or greater than the setpoint inverter differential inverter value measured probe 2 setpoint inverter inverter Fig 16 differential P37 enabling of the autostart Allows the selection of the autostart procedure When the procedure i
17. ard can operate also in the absence of the terminal unit do m mmm not disconnect and then connect the terminal to the main board before about 5 seconds have elapsed if the operation is carried out EN when the unit is ON Bm C Main board _ Ds Fig 26 cod Carel 030221891 rel 1 0 25 07 00 27 pCO Stage Controller 03 Installation of EPROM Before connecting disconnecting the EPROM power off the pCO board For a proper functioning of the system the EPROM must be connected into its socket on the main board keeping a correct alignment of the notch on the surface of the EPROM with the corresponding notch on the socket To be sure check that the glazed side of the EPROM coincide with the glazed side of the socket or with the reference notch serigraphed on the board Connect the EPROM to the corresponding main board socket so that all the pins are properly inserted into their seats When removing the EPROM do not touch the SMD electronic components mounted on the board in the internal space of the socket Caution using the EPROM and the pCO main board Fig 27 Position of the EPROM Electrical damages o the electronic components are usually due to electrostatic charges induced by the user The utmost care is needed when using these components and particularly e before handling any electronic component or card touch a ground reference avoiding to touch the materials is not enough as a d
18. check pin strip J14 Probe 2 only when the probe is of the active type 0 1 volts or is a pressure probe 4 20 mA check pin strip J15 43 1 ID6 Device 6 lock Pressure switch of high pressure antifreeze ID7 ID10 01 4 Notconnected Digital outputs j22 4 Netcometed J 22 22 24 NC10 Device 10 contact normally closed J22 8 Not connected J22 9 Device 9 contact normally open J j22 10 19 Commondeice9 C9 Device 8 contact normally open J24 2 C8 C7 Device 9 contact normally closed C8 24 3 Notcomnected 0 24 5 C7 Commondevce7 2 24 6 Notconnected 0 cod Carel 030221891 rel 1 0 25 07 00 24 E 1 pCO Stage Controller 24 9 Notcomnected 00 46 3 PNerconmeded 0 0 LU 46 9 Device 2 contact normally open Not connected Analog ouputs 0 10 Vdc DESCRIPTION J20 1 Reference signal YO J20 2 Reference signal Y1 J20 3 Compressor inverter J20 4 Fan inverter 8 CONNECTION OF THE INPUTS Digital inputs e from ID1 to ID10 24V 50 60 Hz or 24 V q 220V gt ID11 and ID12 230V or 24V max 50 60 Hz 24V NC contact GO S 24V G 24 9 1 T P AVSS o iD xi NC contact lt ID11 Fig 19 for pCO terminal block see Fig 18 NC contact Note do not connect a
19. compressor 1 off 3 capacity controls 9 0 capacity control 1 compressor 1 off 7 S3compressors 2 capacity controls P62 cold warm With this parameter it will be possible to decide whether these devices belonging to the circuit 1 are used to obtain cold P6220 e g compressors or warm P62 1 e g boilers e proportional band e proportional band e cold warm 1 2 n n 2 1 pressure or differential pressure or differential set temperature temperature e neutral zone e neutral zone e cold e warm request switch on devices request switch on devices Set set l differential pressure or differential pressure or C IV P temperature lt temperature request switch off request switch off devices devices AL13 not working EEPROM In case of an EEPROM failure chip within the device this signal is activated Skilled technicians are needed cod Carel 030221891 rel 1 0 25 07 00 19 pCO Stage Controller AL14 AL15 AL34 not working probe The relevant probe is broken or is not connected Check the wiring and functioning of the probe If AL14 is present the devices programmed with the P5 parameter are forced to switch on and the inverter of the device no 1 valve if enabled is forced to 10 volts The remaining devices can be switched on according to the value measured by the probe 1 If AL15 is present all the devices connected to the circuit 2 are forced to switch o
20. e same logic 0 mV correspond to 0 C 0 RH Pressure probes in case of errors in the reading of these probes check e that analog inputs accept 4 20 mA signals see Fig on page 35 e the limits set via software correspond to the probes being used Measuring with a voltmeter the voltage at the terminals Bn and AVSS your indirectly obtain the current of the probe signal since the input impedance is 50 ohms I2 V HR The Ps pressure value can be obtained as follows SB Scale Bottom PS Vmeas 50 0 004 SBmax SBmin 0 016 SBmin Example the probe used has a SBmin 0 5 Bar SBmax 7 Bar the read voltage equals Vmeas 0 5 V The Ps pressure that the probe is measuring is Ps 0 5 50 0 004 x 7 0 5 0 016 0 5 2 3 Bar e Check that the capillary probe is not clogged NTC probes the probe signal is an ohm value that depends on temperature The table below shows different resistance values at different temperatures Disconnect the probe at the interface input and measure the resistance at its terminal thus inferring the corresponding temperature value from the table below 20 67 71 0 27 28 20 12 09 15 53 39 5 22 05 25 10 00 10 42 25 17 17 96 30 8 31 5 33 89 15 14 68 35 6 94 The pCO turns On and off repeatedly watch doq or it activates some digital and or analog outputs Check a power cables they should be far from the main board microprocessors b the proper size of the pow
21. er side The printer must with communication serial port RS232 The printer must be programmed with the following data 1200 bauds no parity 8 data bits 1 or 2 stop bits Fig 28 Rear part of the pCO s unit Serial cable for printer 2 3 9 pole female 25 pole male connector pCO x connector printer side side 8 20 10 2 Clock board This figure shows the real time clock board code CLK0000000 which allows to display date and time This board is necessary when a time band control action is required In case of power failure a rechargeable lithium battery 45 mA h max recharge time 12 h will make the board work for more than one month Fig 29 Clock board cod Carel 030221891 rel 1 0 25 07 00 28 pCO Stage Controller 11 USEFUL ADVICE FOR A CORRECT INSTALLATION Do not mount the boards in places with the following features e Wide and quick ambient temperature variations e Relative humidity higher than 85 e Strong vibrations and shocks e Direct exposure to jets of water e Places where explosives or flammable gaseous mixtures are present e Exposure to dust dust forms a corrosive patina that produced could oxidize the unit and reduce the insulation e Exposure to aggressive gases or pollutants such as sulphuric or ammoniacal gases saline mists etc with ensuing corrosion and or oxidation High magnetic fields and or radiofrequencies do not place the units ne
22. er transformer not supplied by Carel see note on page 27 c the metallic mounting hardware must be used when mounting the main card to the electrical panel Failure of the serial connection to the local supervisor Check a the presence and proper connection of the serial board code PCOSER0000 b correct setting of the identification number of the pCO unit C codes of the serial cables used in the system d proper connection of the serial cables according to the Carel diagram in the supervisory manual e disconnection of the serial cables Failed connection to the remote supervisor Check a power supply to the Gateway if any and of the modems b Gateway correct programming procedure if any C if the modem used is suitable for Carel serial network User terminal does not work locked keypad Check a the terminal has probably been disconnected and then connected without waiting for 2 3 seconds see page 28 If so turn the pCO Off and On again with the terminal connected b check that the EPROM has been correctly inserted cod Carel 030221891 rel 1 0 25 07 00 30 13 APPENDIX B CONNECTIONS Connection of the pCO to the other devices pCO Stage Controller General alam general high pressure switch Selection setpoint by potentiometer or El LLLI t DO E tn E rn N ice inverter 0 10V General alam a
23. er when connecting them to the terminal block Pressure probes 2 wire probes Pressure probes 24 J1 2 x I SPK1000000 0 5 7bar SERZIOVO0O 107 23par SPK3000000 0 30bar pCO terminal block SPKn000000 probe Bn White wire pressure active output Fig 22 24 Vdc gt Brown wire power supply Note at the terminal 24 a maximum of 80 mA is available Configuration of the B5 and B6 analog inputs As previously mentioned the analog inputs B5 and B6 can receive either probes with voltage output signals 1 1 V or probes with current output signals 4 20mA 1 2 3 1 2 3 4 20 mA 1 1 Volt factory set Fig 23 Pin strip J14 refers to the input B5 while pin strip J15 refers to the input B6 see Fig 18 page 22 cod Carel 030221891 rel 1 0 25 07 00 26 pCO Stage Controller 9 CONNECTION OF THE OUTPUTS e 11 relay digital outputs 8 of which with normally open contacts 1 8 and 3 with changeover contacts NO9 NO 1 1 e 2 optoinsulated analog outputs 0 10 V YO Y1 230 24 V power supply 0 V rif Fan inverter Comp inverter max 10 V Analog outputs Digital outputs Fig 24 The terminals used for analog output power supply VGO e VG1 can be connected directly to the terminals used to supply pCO interface card see x The card is suitable to be installed in electric panels by fastner and screw but its particular mechanical di
24. f the display the probe 2 reading is displayed If one of two probes has not been selected P1 0 and or P24 0 the following symbol appears instead of the reading The LED located on the left of each display lights up near to the unit of measure bar C or F used by the probe selected If at least one of the connected probes is a pressure one by pressing the menu key the correspondent temperature value C or F according to the different value imposed to P39 parameter is displayed The conversion table has been compiled according to the different types of Freon The range used for the conversion between pressure and temperature is 30 50 C Lamp Test initial Wherever the pCO is fed the display switches on all its LEDs and the following figure 8 8 8 8 8 8 is displayed for a few seconds After the Lamp Test the probe readings are displayed and only the LEDs needed for the functioning are switched on During this procedure it is possible to verify if all the LEDs are working Selection of the negative parameters Many parameters that can be selected from the terminal can have negative values When these parameters are included between 99 and 10 it is not possible to select the decimal value Therefore the whole value without decimal is always accepted From the supervisor on the contrary it is also possible to select the decimal value For this reason when selecting from the supervisor negative parameters with values ran
25. g Threshold and hour number AL 25 Probe 1 threshold of high is exceeded Wiring of the probe 1 and verification of the threshold of high Probe 1 threshold of low is exceeded Wiring of the probe 1 and verification of the threshold of low Probe 2 threshold of high is exceeded Wiring of the probe 2 and verification of the threshold of high Probe 2 threshold of low is exceeded Wiring of the probe 2 and verification of the threshold of low r r r Ir r CO CO CO NINININ NO m 00 CO NI N O NIO A o cO Co D Exceeded threshold of the device 10 operation Only signalling Threshold and hour number hours AL 33 The number of devices being selected exceed Number of selected devices the outputs actually available Probe 3 is not connected and does not operate Wiring of the probe 3 Clock board is broken or not connected Board connection cod Carel 030221891 rel 1 0 25 07 00 11 pCO Stage Controller 5 DESCRIPTION OF PARAMETERS t1 112 time display of the devices These parameters indicate the number of working hours of every device When displaying these parameters the identification number alternate every two seconds with the number of working hours of the device corresponding to the code Tl HOUR NUMBER 35178 NTIF lt O 2 m O z O gt z 79 gt 2 m Qo Qo O
26. ging 99 and 10 it is necessary to select exclusively values with O as decimal part Installation of the Default Values automatic installation in the software a control is implemented that carries out the automatic installation of the default values when the initial program loading is done or when the EPROM is substituted for another different version verify the version and date reported on the EPROM label manual installation if the user wants to reprogram the machine he must put it into the OFF state Afterwards he must press simultaneously the MENU PROG buttons till rST 0 appears then press or button the symbol 8 8 8 8 8 8 is displayed all the LEDs stay alight for a few seconds and in the meantime the software installs the default values cod Carel 030221891 rel 1 0 25 07 00 20 pCO Stage Controller 6 CONNECTIONS For an exhaustive description of the hardware and of the installation procedure please refer to the User manual of the pCO available on request 61 Hardware architecture Terminal unit with LED or LCD display code with program Connector for RS422 5 serial board optional code PCOSERO0000 Connection code code S90CONNOO Standard cable for RS232 printer not supplled 7777777 Connector for clock board optional code CLK0000000 il Printer not supplled Main board with screw or plug in terminals code PCOB000000 Fig 17
27. hat alarms has been detected but now they are no longer true In this situation alarm relay keeps the contact open to signal what happened If now new alarms come up pCO re acts the initial procedure Devices are locked out until the user cancels alarm messages from memory This is achieved by pressing key alarm while alarm codes are visualized in the display If the reasons of the alarms situations are effectively gone pCO acts as following alarm relay closes NC contact from NO a NC the buzzer if it has not been silenced yet by pressing key alarm is de activated red LED behind key alarm is turned off Otherwise if the alarm conditions are still actived pCO re acts the initial procedure P45 delay on energizing alarm relay The parameter allows the user to set a delay minutes between the detection of an alarm and the activation of the alarm relay digital output no 11 If P45 is zeroed alarm relay acts immediately P46 disabling key On Off The parameter disables the functioning of key On Off to turn the unit off If P46 is zeroed the user is able to turn the unit On and Off by means of the relative key otherwise if P46 is equal to 1 key on off allows only to turn the unit on it never stops P47 serial communication baud rate This parameter permits to select the serial communication baud rate When the RS485 serial board is connected it is possible to choose the data transmissi
28. he beginning and ending time of the reduced setpoint The parameter C11 allows the selection the beginning of the time bands with setpoint reduced the parameter C12 makes it possible to select the ending time Examples Time band during the day C11 12 C12 16 the reduced setpoint is active from 12 00 a m to 3 59 p m Time band between two successive days 11 14 C12 9 the reduced setpoint is active from 2 00 p m to 8 59 a m of the following day C11 C12 the reduced setpoint is active throughout the whole day 24 hours IMPORTANT absolutely do not select the value C11 C12 0 C20 selection of the day with exclusion of the time band The parameter allows the exclusive of the time band with secondary setpoint for a selected day The beginning time C21 and the ending time C22 are programmable The data that can be selected are the following 0 exclusion of the time band not enabled exclusion of the time band with secondary set for the day of Monday exclusion of the time band with secondary set for the day of Tuesday exclusion of the time band with secondary set for the day of Wednesday exclusion of the time band with secondary set for the day of Thursday exclusion of the time band with secondary set for the day of Friday exclusion of the time band with secondary set for the day of Saturday exclusion of the time band with secondary set for the day of Sunday NOOR OD cod Carel 030221891 rel 1 0 25 07 00 12
29. i 1 xtemal air temperatur optional Remote onfoff topt NIC Carel 2 probe opt NIC Carel 1 probe opt CELER Device 3 Device 4 a a k Device 5 Device 11 CAUTION Separate by means of a transformer 24V 24V 12VA the power supply of the digital inputs from the power supply of the pCO board N B IF CAPACITY CONTROLS ARE USED IN CIRCUIT 1 the relative digital input must be short circuited to 24V because they are switched off in the event that an alarm locks the relevant compressor detected by its own digital input In particular situation capacity controllers can be de energized after the compressor output if it is necessary to avoid that delay the user must connect the compressor alarm signal to the digital inputs used to detect the possible alarms relative to the unlouders In this way the compressor and all its capacity controllers are simultaneously switched off in the event of alarm condition cod Carel 4030221891 rel 1 0 25 07 00 pCO Stage Controller 14 APPENDIX C EXAMPLES OF APPLIANCES This versatile instrument can be differently programmed according to the characteristics of the plant to be managed For this reason here the connection diagrams of some appliances are shown Refrigerator unit consisting of e
30. ient air temperature probe p temperature passive probe IN OUT Lil 1 Note Fans must be electromechanically controlled by means of a contact of the contactor of its compressor or they must be controlled through an external pressure switch e g RFG or another pressure switch cod Carel 030221891 rel 1 0 25 07 00 34 pCO Stage Controller Chiller unit consisting of e 2compressors e 2 temperature active probes e 2 stages of voltage control for comp chiller water input output e setpoint regulation from analog input POWER SUPPLY 24v ANALOG INPUTS DIGITAL OUTPUTS J22 J24 o ee oii cii noto cio nos wos scz c7 c C2 F 1 3 NO1 cl V V N A A A CMP2 P2C1 P1C CMP1 NO DIGITAL INPUTS J21 o 220V INPUTS OUTPUTS Antifreeze lock general alarm Compressor lock device CINV compressor 1 valve inverter flow switch Potentiometer for setpoint regulation first stage of voltage control Temperature active probes IN OUT second stage of voltage control Note Fans must be electromechanically controlled by means of a contact by the contactor of the relative compressor or they must be controlled through an external pressure switch 15 APPENDIX D MATERIALS AND CODES pCO kit Universal Inserter PCOKITSTGO The kit includes Interface 8 screw fixed analog input connectors PCOB000B21 Terminal pCO
31. if P4121 0 OSc 1 e C14 Monday with secondary set only if P41 1 O 025noioys C15 Tuesday with secondary set only if P4121 0 OocSGot gt e C16 Wednesday with secondary set only if P41 1 0 0 1 Thursday with secondary set only if P41 1 0 02noioys Friday with secondary set only if P4121 0 0ono ioys o Saturday with secondary set only if P41 1 0 0 01 half an hour exclusion only if P4121 o 107 gt 9 l exclusion beginning only if P41 1 me ae i exclusion end only if P41 1 10 C214C12 h Setpoint button Description Def Rating Unit of ault measure display of the probe 1 actual setpoint enabled code in case of St3 St4 C F bar setpoint control through analog input or if a secondary setpoint is present or finally when the compensation is active selection of probe 1 setpoint only if P1 gt 0 and P4 gt 0 2 5 St3 St4 C F bar selection of probe 2 setpoint only if P24 gt 0 and P27 gt 0 116 0 515 516 C F bar Sit setpoint selection of the probe 1 valve inverter only if P20 1 and aM St3 St4 C F bar P14 1 selection of fan inverter setpoint only if P35 1 16 0 St5 St6 sds C F bar PSS password that allows access to the subsequent parameters 099 selection of the probe 1 minimum setpoint only if P120 selection of probe 1 maximum setpoint only if P1 g
32. is enabled devices operating hour display only if device 5 is enabled device 6 operating hour display only if device 6 is enabled device 7 operating hour display only if device 6 is enabled device 8 operating hour display only if device 8 is enabled device 9 operating hour display only if device 9 is enabled device 10 operating hour display only if device 10 is enabled device 11 or fan inverter operating hour only if fan inverter or device 11 is enabled device 1 valve inverter operating hour display only if device 1 valve inverter is enabled access password to the parameters below device operating hour threshold only if there is at least one device reset of the device 1 operating hour number reset of the device 2 operating hour number only if device 2 is enabled reset of the device 3 operating hour number only if device is enabled reset of the device 4 operating hour number only if device 4 is enabled reset of the device 5 operating hour no only if device 5 is enabled reset of the device 6 operating hour no only if device 6 is enabled reset of the device 7 operating hour no only if device 7 is enabled reset of the device 8 operating hour no only if device 8 is enabled reset of the device 9 operating hour no only if device 9 is enabled r10 reset of the device 10 operating hour no only if device 10 is enabled r11 reset of the device 11 or fan inverter operating hour no only if device 11 or fan inverter is enabled
33. ischarge of 10000 V a common event in the presence of static electricity causes an arc of about 1 cm e materials should be left as long as possible inside their original packaging If it is necessary to take a main board from a packaging transfer the product into an antistatic packaging without touching the back side of the board with the hands e absolutely do not use plastic bags polystyrene or non antistatic sponges e take out of the original antistatic packaging one EPROM at a time e do not touch the pins of the EPROM 10 CONNECTION OF THE OPTIONAL BOARDS 10 1 Serial printer It is possible to use the serial printer only if the pCO terminal with the following code is available PC0T00SL60 terminal unit with 6 digit LED display This terminal unit is equipped with a dedicated 9 pole male connector connector A Fig 28 It is possible to use the serial printer only if the pCO terminal with the following code is available PCOTOOSL60 terminal unit with 6 digit LED display This terminal unit is equipped with dedicated 9 pole male connector connector i for connection to the printer through a 9 25 pole serial cable for printer 9 poles on DLL DULL the pCO side 25 poles the print
34. ltage regulation while if up to 3 compressors have been selected P4 3 it is possible to use 2 stage of voltage regulation while if up to 2 compressors have been selected P422 it is possible to use 3 stage of voltage regulation This parameter is displayed only if P120 and P420 and if the functions Device 1 Inverter and Neutral Zone have been not enabled at the same time P1420 and P20 1 Therefore the parameter is displayed in the following cases P1 gt 0 P420 P1420 P2020 P120 P430 P1421 P20 1 P7 logic of the voltage regulations When voltage regulations are used through this parameter it is possible to choose the operation logic of the outputs dedicated to the voltage regulations normally excited or normally de energised P8 minimum time between the turning on of successive voltage regulations of the same compressor It sets the minimum time needed between two successive voltage regulations or between the starting of the compressor and the respective voltage regulation The parameter is present only if the regulations have been selected P6 gt 0 P9 logic of the voltage regulations turning on full or partial FULL the ON sequence is COMP 1 gt PARZ 1 gt COMP2 PARZ etc While the OFF sequence is PARZ 2 COMP2 PARZ 1 gt COMP 1 PARTIAL in the ON sequence the capacity control will be activated as soon as all the compressors are On In the OFF sequence the compressors are turned Off when the all ca
35. mension allows it to be used for DIN rail mounting by means of the optional DIN rail adapters and the metallic case optional provided by Carel 91 Power supply pCO can be powered by 24 V 10 15 10W 24 V 10 15 50 60 Hz 15 VA IMPORTANT When installing the unit use a minimum 50 VA transformer The transformer must power only the pCO and not other possible devices If the transformer secondary is grounded check that the same ground cable corresponds to the cable arriving to the control and is connected to the GO terminal 24 24 Fig 25 9 2 Connection between terminal unit and main board The connection between the terminal and the main board is performed by means of a 6 way telephone cable supplied by Carel The connection is carried out by plugging the telephone connector into the e terminal J19 of the main board and into the terminal of the terminal unit E e Plug the connector thoroughly into the terminal until a click is heard E TE To unplug the connector push gently the prominent plastic tab and remove B cable 5 the cable mmi Carel serial connection have three different lengths bi 890 002 length 0 8 m J 4 S90CONNOOO length 1 5 m L L SS0CONNOO length m E n The main bo
36. n and the fan inverter is forced to 10 volts If AL34 is present the compensation if enabled does not work These alarms can be operated only manually and so they do not reset until the user does not press the alarm button the pCO terminal in order to clear the alarms AL16 high pressure switch antifreeze AL16 given the high pressure alarm if the pCO controls a Refrigerator Plant see pp 32 33 or it gives the antifreeze alarm if the pCO controls a Chiller see pp 34 35 AL17 low pressure switch flow controller AL17 gives the low pressure alarm if the pCO controls a Refrigerator Plant see pp 32 33 or it gives the flow controller alarm if the pCO controls a Chiller see pp 34 35 AL33 incorrect selected device number If the sum of the device number of the primary and secondary circuit and of the voltage controls exceeds the number of outputs really available the ALL33 alarm is produced PSt PSC PSS Psn password These four codes refer to the Password of the Maintenance Clock Setpoint and Programming branches respectively For each of the listed branches the number to be set in order to have access to the successive parameters is 022 Maintenance Clock Setpoint 055 Programming The selected value of the password is always reset when other parameters are visualized Main display Menu After pressing the Menu button the probe 1 reading is displayed on the left side of the display whereas on the right side o
37. ntrol and Neutral Zone have not been enabled at the same time P620 and P1420 Therefore the cases in which the parameter is displayed are P120 P420 P620 P1420 P120 P420 P650 P14 1 case 1 presence of lateral band regulation The control involves the selection of a setpoint 511 and a differential d3 When the value detected by the probe 1 is less than or the same as the value of the valve setpoint there are 0 volts at the output dedicated to this device As the value detected by the probe 2 deviates from the set point the analog output increases in proportion to the deviation and reaches 10 volts when the detected value is the same or higher compared to the setpoint differential Volt setpoint value measure device 1 ifferential device 1 probe 1 Fig 13 case 2 presence of neutral zone regulation The control requires the solution of a deviation Sr2 from the setpoint The output of the device 1 inverter increases when the reading of the probe 1 exceeds the value of the neutral zone setpoint St1 the display of the device 1 inverter Sr2 The decrease takes place when the probe 1 reading is below the value of the neutral zone setpoint In the zone included between the neutral zone set point and the neutral zone setpoint deviation of the device 1 inverter the inverter output does not change at all for this reason the zone is called neutral zone of the inverter The output of the inverter increases decrease
38. ny additional devices to the inputs Idn e g relay coils for remoting the signal to other instruments The pressure switch of the general high pressure antifreeze must be connected in series to all the other lock contacts of the circuit 1 devices capacity controls included see x Unlike the other device lock contacts the contact of the device no 11 is either 230 Vac or 24 Vac therefore it can not be connected in series to the pressure switch of high general pressure antifreeze The device no 11 is locked however by general high pressure switch antifreeze see Analog inputs e from BI to B4 for probes NTC Carel e 5 and for active voltage probes 0 1V or current probes 4 20 mA selectable by jumper Types of probes that can be connected to the analog inputs Output active temperature probes 3 wire probes Temperature Probes NOTE the 24 55 00 00 1 a terminal can supply SSTOOA0420 a max 80mA pCO terminal block Probe contact Fig 20 cod Carel 030221891 rel 1 0 25 07 00 25 pCO Stage Controller Temperature NTC Carel probes 2 wire probes Temperature NTC C AR EL probes AVS NTC0150000 NTC0600A00 NTC0350000 NTC120W000 Bn Carel Probe NTC015W000 SSWNTC0000 NTC030W000 SSDNTC0000 pCO terminal block NTC060W000 Fig 21 The two cables of the NTC probes are equivalent because they have no polarity Therefore it is not necessary to comply with a special ord
39. obes of the active type P2 P25 probe lower range These parameters are necessary when non Carel probes have been selected Keller probes or 4 20 mA probes They represent the lower operating limit of the respective probes For instance to the 4mA could correspond the 0 bar value and so the 0 value must be attributed to the parameter P3 P26 probe upper range These parameters are necessary only when non Carel probes have been selected Keller probes or 4 20 m A probes They represent the upper operating limit of the respective probes For instance to the 20 mA could correspond the value of 30 bar and so the value 30 must be attributed to the parameter P4 probe 1 device number The parameter represents the number of devices controlled by the probe 1 except possible voltage control The device number may range from 0 to 11 When 11 devices are selected it is not possible to connect any device to the secondary circuit except the fan inverter P5 number of devices operating with probe 1 out of order When occurring the alarm of broken or not connected probe 1 AL14 the parameter P5 indicates the minimum number of the circuit devices which are On P6 number of voltage regulation If the devices controlled by the probe 1 are compressors it is possible to select the presence or not of one two or three stages of voltage regulation If up to 5 compressors have been selected P4 5 it is possible to use only one stage of vo
40. on speed 1200 baud 1 2400 baud 2 4800 baud 3 9600 baud 4 19200 baud cod Carel 030221891 rel 1 0 25 07 00 18 pCO Stage Controller P61 circuit 1 devices switch off mode If P61 1 during the switch off phase of the devices belonging to the circuit 1 first all the capacity controllers and then the respective compressors are switched off This procedure is useful when a reduction of the number of compressor switch on off is required so as to protect their lifetime lf P6120 during the switch off phase current consumption is chosen example If in the unit there are 3 compressors P4 2 compressor capacity controllers P6 P61 1 are selected and furthermore all the devices are switched on when the switch off of the devices is needed first all the capacity controllers and only afterwards the compressors will be switched off Therefore the situation could occur in which 3 compressors are switched on at the 33 of their capacity Step claim device total number of devices switched on 2 capacitycontrol 1compressor on 1 compressor 1 capacity control 3 capacitycontrol 2 compressor 7 1compressor 2capacitycontrols 4 jcompreso2on 7 22 2 capacity controls 5 jon 1 compressor2 7 2compressors capacity controls 6 capacitycontrol2compressor2 7 2 compressors 4 capacity controls 8 off capacitycontrol 2
41. other value which can be used to calculate the limit switch point of the inverter i e the measured value to which corresponds an output of 10 volts setpoint value measured Fig 6 when either d3 or d4 are involved the differential refers to the device 1 valve inverter or to the fan inverter respectively These parameters are visible only if the outputs for the inverter P2021 and P35 1 are provided for furthermore in the case of the circuit 1 valve inverter the side band control must be selected P14 1 Sr1 inverter step of the device no 1 see fig 14 The parameter is visible only when the presence of the inverter on the device no 1 has been selected and also if when the type of control is based on neutral zone It establishes the increment and decrement of the device no 1 inverter see parameter P20 Sr2 deviation of the device no 1 inverter see fig 14 The parameter is visible only when the presence of the inverter on the device no 1 has been selected and also when the type of control is based on a neutral zone It is indispensable for the calculation of the inverter insertion into the device no 1 see parameter P20 Sr3 minimum opening of the device 1 valve inverter The parameter is visible only when the presence of the inverter on the device no 1 valve has been selected This parameter makes it possible to apply a minimum voltage at the inverter valve output Therefore this value is forced when the condition
42. pCO universal stage controller 1 i OV s moe Nn UUUUUUUL hp Program code E PSTD El U0A CAREL Rif 96EM Technology amp Evolution TABLE OF CONTENTS 1 2 10 11 12 13 14 15 2 1 TERMINAL UNIT FRONT PANEL VIEW WITH FRONT DOOR CLOSED 3 2 SIFICONERUBBER EXPERNAEBUFCONS ilaria sayay asas 3 2 3 FRONT VIEW WITH FRONT DOOR OPEN 1 00000000000000000 4 2 4 USE OFTHE BUTTONS etc ECC 4 2 5 DISPLAY icd Acum MEM iM LARA ARENA en tud d ie m 5 2 6 FUNCTION INDICATOR We DS ZZ G edem Sp EOE I MM IR RET 5 6 1 HARDWARE ARCHITECTURE ri amy E E E 21 6 2 MAIN BOARD LAYOUT eoceoooooo 22 MEANING OF THE INPUTS AND OUTPUTS t L L 9 1 POWER SUPPLY 2 9 2 CONNECTION BETW EEN TERMINAL UNIT AND MAIN BOARD
43. pacity controls are already Off P10 turning on minimum time of the probe 1 devices It sets the turning on minimum time of the circuit 1 devices As a consequence when all the circuit devices have been activated they must remain ON for the same length of time as the one selected by the above mentioned parameter request AN E device ae P10 Fig 7 cod Carel 030221891 rel 1 0 25 07 00 14 pCO Stage Controller P11 turning off minimum time of the probe 1 devices lt sets the turning off minimum time of the circuit 1 devices When after the last turning off the selected minimum has not elapsed the circuit 1 devices are not turned on again request LE device ci P11 Fig 8 P12 minimum time between successive probe 2 devices lt represents the minimum time in seconds that must elapse between the turning on of a device and the turning on of the subsequent device controlled by the probe 1 This parameter allows to avoid simultaneous starting of the devices device 1 ON OFF device n ON o0 P12 Fig 9 P13 minimum time between successive turning on of the same device of the probe 1 It sets the minimum time in seconds that must elapse between successive turning on of the device independently of the detected measurement and of the setpoint Selecting this parameter it is possible to restrict the turning on number per hour For example if the maximum allo
44. reset of the device 1 valve inverter operating hour no only if device 1 valve inverter is enabled device 2 manual operation only if device 1 is enabled device 2 manual operation only if device 2 is enabled device 3 manual operation only if device 3 is enabled device 4 manual operation only if device 4 is enabled device 5 manual operation only if device 5 is enabled device 6 manual operation only if device 6 is enabled device 7 manual operation only if device 7 is enabled device 8 manual operation only if device 8 is enabled device 9 manual operation only if device 9 is enabled device 10 manual operation only if device 10 is enabled device 11 or fan inverter manual operation only if device 11 of fan inverter is enabled device 1 valve inverter manual operation only if device 1 valve inverter is enabled Probe 1 calibration only if P2120 probe 2 calibration only if P2420 probe 3 calibration only if P2221 0 999999 0 999 0 999 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable hx1000 A N 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 disable 1 enable 0 di
45. s Fig 2 References Fig 2 1 On off button turns on and off the unit The green LED that lights up in the button shows the state of the machine if the LED is Off the unit is Off the intermittent LED indicates that the unit has been turned off by a supervisor or a remote control through a digital input if the LED is on the unit is On Alarm button it is used to display the alarms to reset them manually and silence the buzzer When the button lights up red at least one alarm has been detected The arrow pointing upwards sets the values of the control parameters it does not light up or to disable manul procedure The arrow pointing downwaras sets the values of the control parameters it does not light up or to disable manual procedure Enter button to scan the messages on the display The button is continuously alight yellow light and indicates that the current is On cod Carel 030221891 rel 1 0 25 07 00 3 pCO Stage Controller 2 3 Front view with front door open Figure 3 references Polycarbonate coated mechanical buttons Function indicator LEDs 3 Adhesive polycarbonate provided upon request 4 Silicone rubber buttons 2 4 Use of the buttons displays the values measured by the probe 1 and 2 and moreover displays the conversion of these values from pressure values to temperature values allows access to the values related the hour counters operated manually to
46. s B n Analog input 1 6 8 for boards with 8 analog inputs code PCOB000 1 AVSS Common reference of the analog inputs B n 13 Analog outputs 0 10 V Y n Analog outputs 1 and 2 VG1 External power supply for analog outputs 24V or 24V VGO Reference for power supply and analog output signals YO and Y1 14 Power indicator LED 15 Analog inputs B n analog inputs 7 and 8 24 Vcc power supply for external active probes 24V n current 16 Jumper J15 to select the analog input B6 in 0 1 V or 4 20 mA 17 Jumper J14 to select the analog input B5 in 0 1 V 4 20 mA 18 Jumper J28 to select the analog input 0 1 V or 4 20 mA 19 Jumper J29 to select the analog input B8 in 0 1 V or 4 20 mA j AU RS aS 1 2 4 20 mA 2 3 0 1 V 1 2 4 20 mA 2 3 0 1 V 1 2 4 20 mA 2 3 0 1 V 1 2 4 20 mA 2 3 0 1 V cod Carel 030221891 rel 1 0 25 07 00 23 pCO Stage Controller 7 MEANING OF THE INPUTS AND OUTPUTS Power supply CONNECTOR SIGNAL DESCRIPTION J17 1 G Power supply 24 10 W or 24V 50 60 Hz 15 VA see note on page 28 J17 2 Power supply reference 2 24 Power supply for external active probes 24 V max power that can be supplied 80mA Connection with terminal unit 6 way telephone cable connection with terminal unit Analog inputs 12 4 12 5 B5 Probe 1 only when the probe is of the 0 1 volt active type or is a 4 20 mA pressure probe
47. s involve the application of a voltage value lower than the minimum value selected Sr4 minimum aperture of the device 1 valve inverter continuously applied The parameter is visible only when the presence of the inverter on the device no 1 valve has been selected parameter P20 If the parameter SR4 is 1 the minimum aperture of the device 1 valve inverter parameter Sr3 is applied even if in case of alarm presence on this device or when if P1420 compressor 1 is Off Only when the unit is Off the output of the inverter valve remains O in all cases SH1 SH alarm threshold of high It represents the threshold of high of the probe 1 and 2 respectively When the value detected by the probe exceeds the selected value the alarm is activated cod Carel 030221891 rel 1 0 25 07 00 13 pCO Stage Controller SL1 SL2 alarm threshold of low lt represents the threshold of low of the probe 1 and 2 respectively When the value detected by the probe falls below the selected value the alarm is activated P1 P24 type of probes The parameters makes it possible to specify the type of probes being used The following selections are available 0 probe is absent 1 active temperature probe 1V dc 1V dc 2 temperature NTC probe 3 pressure Keller probe 4 20 mA Keller Depending on the selection it is necessary to connect the probes to the analog input B1 and B2 passive temperature probes or B5 and B6 pressure probes or temperature pr
48. s at each cycle of the programme i e about every second of a value that can be selected named inverter step Sr1 eutratl zone M device setpoint value measured neutral differential neutral zone probe 1 devices offset inverter device 1 inverter neutral zone inverter increase zone value measured inverter decrease zone probe 1 Fig 14 Caution when the device no 1 valve inverter is enabled and the regulation takes place with neutral zone the activation of the devices occurs as follows the device no 1 which is controlled by the inverter is activated as soon as turn on is needed if the request remains the output of the device no 1 inverter is increased if the request is still present and the output of the inverter reaches 10 volts the other devices are required one at a time with rotation when selected and according to the timing The turn off stage occurs as follows the inverter output is decreased when the inverter output has already reached 0 volts the other devices turn off one at a time according to the timing and rotation the last device being turned off is the no 1 cod Carel 030221891 rel 1 0 25 07 00 16 pCO Stage Controller P21 selection of the analog input through setpoint variation see fig 30 The sepoint of the devices managed by the probe 1 can be selected by means of a potentiometer connected to the B3 AVSS terminals This is possible if
49. s enabled if the unit is in the On state before a black out after the black out period the On state is automatically restored P38 type of freon It allows to enable the type of freon used in the plant where the programme is installed No selection R22 R134a NH3 ammonia R404a O cod Carel 030221891 rel 1 0 25 07 00 17 pCO Stage Controller P39 C or F Defines the unit of measure 0 temperature in degrees Celsius centigrades 1 temperature in degrees Fahrenheit When changing measurement system automatic conversion of the values measured on the analog inputs is given Caution the automatic conversion does not take place for the parameters The user must update them when changing them P40 remote on off selection If the value of the parameter is 1 it is possible to use the forth analog input B4 to turn On or Off the unit open contact unit off closed contact unit P41 clock enabling In case the clock board is used this parameter must be 1 otherwise it is not possible to have access to the clock branch P42 printer enabling In case of connection to a serial printer this parameter must be 1 otherwise it is not possible to have access to the printer branch P43 identification number The parameter allows the setting of the unit identification number useful only in case of connection to a system of supervision and or remote assistance P44 alarms with automatic or man
50. sable 1 enable 0 disable 1 enable 0 disable1 enable 0 disable 1 enable 0 disable 1 enable O O 3 zi N O disable 1 enable C F C F bar C F 5 0 5 0 5 0 5 0 5 0 5 0 O r N cod Carel 030221891 rel 1 0 25 07 00 6 pCO Stage Controller Printer button Description Default Rating Units of measure immediate printing request only if P42 1 O 0 1 enable selection of the cyclic printing time only if P42 1 160 0 999 I O button measure display of the value detected by the probe 1 99 09 9O F9bar display of the value detected by the probe 2 99299 9 O F9bar selection with a potentiometer of the probe 1 setpoint only if P2121 Lp qe pem or display of the ambient air temperature only if P2120 and if P2221 i4 display of the remote on off state 0oocfnRioon state of the device 1 lock alarm O0oofioon J state of the device 2 lock alarm state of the device 3 lock alarm O0oofioon state of the device 4 lock alarm O0oofjioon State of the device Slockalarm Off toon Ooff ison O offftson 10 i10 0 off 1 on 0 off 1on gt gt gt pd EE A i12 state of the low pressure flow regulator alarm 0
51. t 0 selection of probe 2 minimum setpoint only if P2420 int ERST 99 99 9 C F bar selection of probe 2 maximum setpoint only if P24 gt 0 99 99 9 C F bar 99 99 9 C F bar 0 20 0 C F bar o ooo NI LN o en o secondary setpoint selection only if at least a device of the circuit 1 is present selec of the probe 1 inverter deviation only if P20 1 and P14 0 minimum aperture of the device 1 inverter only if P20 1 P20 1 E threshold of high for the probe 1 only if P120 ENS E NE INE WEE az IA Es Ir 1enable threshold of low for the probe 1 only if P120 threshold of high for the probe 2 only if P2420 t St3 514 515 St6 di d2 d3 d4 Sri Sr3 minim Aperture of the device 1 inverter always applied only if SH1 SH2 d cod Carel 030221891 rel 1 0 25 07 00 8 pCO Stage Controller Programming button prog measure PSn password that allows access to the programming branch 0 0 999 probe 1 type 3 0 absent 1 active pe Peer A P2 probe 1 lower range only if P1 3 0 5 P3 1 higher range only if P1 3 17 05 30 ba P4 probe 1 device number only if P1 gt 0 5 Joi m operating probe 1 devices with active broken probe alarm only if LEN 1 gt 0 and P420 PG number of voltage
52. the connected devices and allows the adjust of the probes gives access to the group of parameters for the operation of the printer control as required 7 displays the status of inputs outputs both digital analog allows the display programming of the clock if present and of the relevant time range with setpoint variation allows the display and selection of the setpoint prog allows the setting of both of the different operation parameters protections thresholds and the parameters concerning the configuration of the unit O O O displays the version of the application programme The LEDs beside the listed buttons light up when pressed and remain in this condition until any one of the above mentioned buttons is pressed cod Carel 030221891 rel 1 0 25 07 00 4 25 Display Features pCO Stage Controller COMPRESSORS Fans D network Fig 4 e number of digits 6 colour green height 13mm number of side indicator LEDs 5 number of LEDs indicating the displayed function 3 3 2 6 Function indicator LEDs The 5 LEDs placed beside the display have the following meaning 1 On LED at least one device controlled by the probe 1 is active Flashing action at least one device controlled by the probe 1 is in timing phase that is its has been required but it remains off as long as its timing is fulfilled Off LED 2 On LED Off LED On
53. tomatically to an end after 30 minutes CL1 CL2 CL3 calibration of the probes These parameters allow the software calibration of the probes The value given to these parameters is actually added positive value or subtracted negative value to the measures detected by the respective probes The offset of calibration may be changed from 3 to 3 with the accuracy of the tenth The CL3 parameter is visible only when the relative probe P22 1 has been selected Pr1 request of immediate printing This parameter allows a print of the unit main data such as values detected by the probes active devices and the most important programmed data Pr2 cyclic printing time The parameter indicates the cyclic printing time i e the period between two successive periodic printings Ai3 meaning of the analog input B3 see fig 30 Allows the display of the value detected by the third analog input that can be have two meanings variable setpoint using a potentiometer P21 1 if the parameter P21 0 and P22 1 then the detected value represents the temperature probe of the ambient air necessary for controlling the setpoint compensation 111 digital input ID11 see fig 30 The parameter allows the display of the state of the digital input no 11 This input can represent the lock of the device no 11 if it has been previously selected the lock of the fan inverter if the device no 11 has not been selected C11 C12 selection of t
54. ual reset 44 0 automatic In the event that one or more alarm conditions are detected pCO acts as following red LED behind key alarm lit buzzer activated alarm relay changed over relay normally energized opens Pressing key alarm silences the internal buzzer and pCO displays the list of alarm codes f the causes of the alarm are no longer activated every locked out device starts normal functioning and pCO acts as following alarm relay closes from NO a NC the buzzer if it has not been silenced yet by pressing key alarm is de activated red LED behind key alarm blinks If in this stage new alarms come up pCO re acts the inital procedure The red LED while blinking informs the user that alarm situations have been detected and that now they are no longer actived The codes of such alarms are memorized so the user is able to see these situations by means of key alarm if after visualizing them the user presses again key alarm they are definitely cancelled and red LED is de activated P44 1 manual In the event that one or more alarm conditions are detected pCO acts as following red LED behind key alarm lit buzzer activated alarm relay NC contact change over relay normally energized opens Pressing key alarm silences the internal buzzer and pCO displays the list of alarm codes If the alarm conditions are no longer actived the red LED blinks to inform t
55. urs Exceeded threshold of the device 11 or fan inveter operation AL 12 Exceed hour threshold of the device 1 valve inverter AL 13 Not operating Eeprom Reset manufacture values and turn the pCO off If when turning on again AL13 remains replace the board AL 14 Probe 1 is not connected or does not operate Connections of probe 1 AL 15 AL 16 AL 17 Probe 2 is not connected or does not operate oee page 15 Connections of probe 2 Detection of high pressure switch antifreeze Device complete stop Wiring of the digital inputs 1 10 Detection of low pressure switch flow regulator Device complete stop Wiring of the digital input 12 Stop of the device 1 Device 1 Stop and Wiring of the digital input 1 inverter of the device 1 otop of the device 2 Stop of the device2 Wiring of the digital input 2 otop of the device 3 Stop of the device3 Wiring of the digital input 3 AL 21 AL 22 AL 23 Stop of the device 4 Wiring of the digital input 4 Stop of the device 5 Wiring of the digital input 5 Stop of the device 6 Wiring of the digital input 6 Stop of the device 7 Wiring of the digital input 7 Stop of the device 8 Wiring of the digital input 8 Stop of the device 9 Wiring of the digital input 9 otop of the device 10 Stop of the device 10 Wiring of the digital input 10 Stop of the device 11 or stop of the fan inverter Stop of the device 11 Wiring of the digital input 11 Exceeded threshold of the device 7 operation hours Only signallin
56. vice 1 valve see explanation EM analog input enabling for setpoint variation only if P120 and 4 gt 0 and 22 0 enabling of the air temperature probe only if P21 0 ERN ES TK a E Es E enabling of probe 1 compensation only if P120 and P4 gt 0 and P21 0 and P22 1 probe 2 type probe 2 lower range only if P24 3 probe 2 higher range only if P2423 7 probe2 device number only if P24 gt 0 min time betw Turning on of the probe 2 devices if P1 1 or P1 2 P4 gt 0 P21 0 and P22 1 regulation with neutral zone or lateral band of the probe 2 circuit only if P24 gt 0 and P27 gt 0 type of regulat of the probe 2 circuit only if P24 gt 0 and P27 gt 0 and P30 1 integration time of the sec circuit only if P2420 and P27 gt 0 and P31 1 time between turning on request of the probe 2 devices only if P24 gt 0 and P27 gt 1 and P30 0 time between turning off requests of the probe 2 only if P24 gt 0 and P27 gt 1 and P30 0 rotation enabling of the probe 2 devices only if P24 gt 0 and P27 gt 1 O disable 1 enable 3 O absent 1 active 2 passive 3 keller 0 0 5 30 0 5 30 0 999 sec 1 0 neutral z 1 lat Band 0 10 1PHl 300 900 e 0 999 sec 999 0 disable 1 enable 0 O disable 1 enable 0 999 0 disable 1 enable 1 0 not sel 1 gt R22 25H134a 3 NH3 4 HR404a ul 0 0 disable 1 enable bar bar no N O je
57. wed number of insertions is 10 selecting a value of 360 seconds allows to stay within established this limit ON request P OFF device Si P13 Fig 10 P14 P29 regulation with lateral band or neutral zone They indicate the activation of the connected devices In lateral band the devices are positioned proportionally within the controlled zone Example with 3 devices on a single circuit 3 devices in the same circuit value measured setpoint Fig 11 In neutral zone there is a zone where no device is activated or deactivated The activation point of the devices is when the detected measure exceeds the neutral zone detected measure gt set differential The number of the devices to be activated depends on the time elapsed in this condition The device switch off takes place when the detected measure goes down below the neutral zone detected measure set and in this case too it depends on the time See timing P17 P32 and P18 P33 energize neutral zone setpoint N T AO S9 lt differential s dev dev dev deenerqize 1 value measured Fig 12 P15 P30 regulation type Indicate the regulation of the circuit 1 and 2 respectively This parameter is valid only when the control with lateral band of regulation is chosen P1421 and P29 1 The regulation may be Proportional or Proportional Integral cod Carel 030221891 rel 1 0 25 07 00
58. wer supply terminal 24V 50 60 Hz 15VA or 24V 10W see note on page 28 Telephone type terminal for connective to the user terminal unit MMI Man Machine Interface Real time clock board optional RS422 RS485 optoinsulated board optional for connection to a serial line of supervision telemaintenance Pin strip for analog input adopter board eventually available upon request only EPROM with application program Jumpers to select the local network communication mode J8 in position 1 2 allows the connection of the board to a terminal unit or possibly to the supervisory in position 2 3 onlythe connection to the local network is enabled J9 in position 1 2 enables the supervisor to reset the pCO board in position 2 3 makes the pCO board independent of the reset action of the supervisor The interface pCO boards by Carel have both jumpers in position 1 2 Caution in this EPROM not exists the local network management 8 Fuse 230 V 2A delayed 9 Digital outputs commutable power 2300VA 10A 230V NO n Normally open contact output n NC n Normally closed contact output n Common contact output n 10 Digital inputs 24V 10 ID n Digital inputs 1 10 IDCM1 Common reference for digital inputs 1 5 IDCM2 Common reference for digital inputs 6 10 11 Digital inputs 230V 10 ID11 ID12 Digital inputs 11 and 12 ID11R ID12R common reference for the digital inputs ID11 and ID12 respectively 12 Analog input
59. z CANT PART When the number of working hours of a given device exceeds the working hour threshold th AL 1 AL 12 are activated Caution when the analog outputs dedicated to the fan inverter and to the device 1 valve inverter are used parameters t11 and t12 the displayed working hours refer to the calculation with the corresponding outputs at a value higher than 0 volt th hour threshold of the devices When the device working hours exceed this value an alarm signal is produced indicating that maintenance of the concerned device is needed If this parameter is given the value 0 the control is automatically excluded Caution selection must be done in h per 1000 1 12 manual operation of the devices These parameters allow the manual activation of every device i e without timing and rotation and independently of the values measured by the probes The sole support of the control through manual operation is the alarm management The manual activation of the inverter devices makes it possible to force their analog outputs to the value of 10 volts The manual procedure can be activated only if the unit is Off Therefore all the parameters no 1 no 12 are not enabled if the unit is On The flashing LED of the menu indicates that the manual procedure is active If after pressing the menu button the enter button is kept pressed for more than 2 seconds all the manual procedure is deactivated In any case the manual procedure comes au

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