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MODBUS Network and Daisy-Chaining

Network Wiring and Configuration • 17

Each Control Link ACC that will use the MODBUS network must have a unique network ID. Number each

controller in sequence, starting with 1. Refer to

Figure 7-14

for dip switch and jumper settings

7.4.4. Step 4: Set the Network Baud Rate and MODBUS Parity

Figure 7-14

-

Control Link ACC Network ID Dip Switch/Jumper Settings

Figure 7-15

-

Control Link ACC Network Baud Rate/Parity Dip Switch/Jumper

NOTE: If you are networking Control Link ACC only for purposes of sharing a dewpoint sensor, you do not
need to set a baud rate or parity. Set all dip switches or jumpers to the DOWN (OFF) position. This will allow

the Control Link ACC to share a dewpoint sensor as long as the network is physically present and terminated

correctly. The dip switches or jumpers are only necessary for assigning a network ID for MODBUS applica-

tions.

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Содержание Control Link

Страница 1: ...026 4704 Rev 6 Control Link ACC Anti Condensate Controller System Installation and Operation Manual ...

Страница 2: ......

Страница 3: ...Emerson 1065 Big Shanty Road NW Suite 100 Kennesaw GA 30144 USA Phone 770 425 2724 Fax 770 425 9319 ...

Страница 4: ......

Страница 5: ...p Network Ports 11 7 2 2 Add and Connect Control Link ACCs E2 Firmware Revision Prior to 2 8 12 7 2 3 Add and Connect Control Link ACCs E2 Firmware Version 2 8 and above 13 7 3 WIRING TYPES 15 7 4 MODBUS NETWORK AND DAISY CHAINING 16 7 4 1 Step 1 Disconnect Power to the Control Link ACC and Open the ACC Enclosure 16 7 4 2 Step 2 Connect the MODBUS Network Cable 16 7 4 3 Step 3 Set the Network Addr...

Страница 6: ... Main Selection Screen 24 8 5 5 Upgrading ACC Using HHT 26 8 5 6 Changing ACC Address Using HHT 26 8 5 7 Exit HHT Mode 26 9 OPERATION 27 9 1 CONTROL LINK ACC STATUS LEDS 27 9 1 1 Heater Status LED 27 9 1 2 General Status LED 27 9 1 3 TX and RX Status LEDs 28 10 ERROR MODES 29 10 1 PRIORITY 1 FAIL OVER TEMP 29 10 2 PRIORITY 2 FAIL TEMP SENS 29 10 3 PRIORITY 3 FAIL DEWPT SNS 29 10 4 PRIORITY 4 FAIL ...

Страница 7: ...ponents 2 1 Control Link ACC P Ns 815 6100 and 815 6105 The Control Link ACC Figure 2 1 handles all aspects of anti sweat heater control and uses solid state switching to control the heaters The on board processor calculates the required heater ON time based on the dewpoint and door frame temperature readings and controls an on board Triac to activate and deactivate the heaters The controller is d...

Страница 8: ...e LED When Control Link ACC controllers are net worked together via MODBUS a single dewpoint sensor connected to one Control Link ACC may be shared by multiple Control Link ACC controllers 2 3 Door Frame Temperature Sensor P N 281 0002 In addition to the indoor air dewpoint the Control Link ACC also factors in the value of the temperature of the case door frame using a mounted temperature sensor F...

Страница 9: ...C to the metal surface using 8 32 thread forming screws Mounting screws are not included with the Control Link ACC For heater current greater than 10A the Control Link ACC UL Recognized version with external heat sink must be used P N 815 6105 The heat sink of the Control Link ACC must be securely mounted against a large heat conductive surface Using thermal grease the Control Link ACC has a metal...

Страница 10: ...l be operating for the case y axis and plot the maximum allowed operating temperature x axis on the graph For example with an external heat sink at 26Amps the maximum ambient temperature would be 40 C 149 F For heater current greater than 10A the heat sink of the Control Link ACC must be securely mounted against a large heat conductive surface Using thermal grease the Control Link ACC has a metal ...

Страница 11: ...Door Frame Temperature Sensor P N 281 0002 Calculating Maximum Ambient Temperature 5 Figure 4 2 Ambient Temperature Calculation no external heat sink ...

Страница 12: ...ents in the door frame and all doors of that frame should be connected in parallel to the Control Link ACC Connect the GND terminal on the controller to Ground 5 2 Ratings and Current Protection The Control Link ACC P N 815 6100 is UL Listed for up to 10A max 40 C and 7A max 65 C The Control Link ACC P N 815 6105 is UL Recognized with external heat sink for up to 30A max 25 C up to 26A max 40 C an...

Страница 13: ...oint sensor to the Control Link ACC DO NOT let any RTV sealants touch the sensor element and keep the sensor element as far as possible from RTV sealed areas Do NOT mount the dewpoint sensor near the bottom of the case or any place where cold air from the case can affect the sensor reading Avoid mounting the sensor in an area with excessive water spray or moisture extremely dirty environments near...

Страница 14: ...for a nut driver on the screw head Figure 6 2 shows the mounting dimensions It may be necessary to cut a 0 25 x 0 25 6 35 mm x 6 35 mm notch in the edge of the metal frame behind the sensor for the wires to pass through 6 1 4 Dewpoint Sensor Wiring The dewpoint sensor cable can be 20 24 AWG range Emerson recommends Belden 8771 P N 135 8771 22AWG cable or equivalent not supplied To install or remov...

Страница 15: ...ounting and Wiring the Sensors 9 Figure 6 3 Dewpoint Sensor Wiring ACC LOW VOLTAGE END 3 pin connector 2 pin connector TEMP SENSOR CABLE BLACK RED WHITE GND PWR DATA THERM THERM Figure 6 4 Dewpoint Sensor Connector ACC View ...

Страница 16: ...rame that stays the coldest The coldest spot on a door frame is usually the bottom horizontal section of the stationary frame under the center door for cases with even numbered doors or near the center mullion for cases with odd numbered doors Cooler doors may also be coldest at the top center of the frame Figure 6 1 on page 7 shows an example of placement in a case with even numbered doors the se...

Страница 17: ...up as the I O network you cannot connect MODBUS devices to COM2 Ensure your E2 is equipped with an RS485 COM Card P N 637 4890 and configured in E2 General Services Serial tab to enable COM4 or an E2 Expansion COM Card P N 637 4871 to enable COM6 Connect the MODBUS network cable to the three terminal connector on the COM port you wish to assign as MODBUS Like other Control Link connections wire RS...

Страница 18: ... E2 Firmware Revision Prior to 2 8 To enable communications between E2 and the Control Link units the devices must be added and addressed in E2 1 Log in to the E2 with Level 4 access 2 Press Connected I O Boards and Controllers 3 In the Connected I O screen in a section labeled ECT Devices Enter the number of ACC devices in the CtrlLink ACC number field 4 Press to return to the Network Setup menu ...

Страница 19: ...aud rate and parity see Section 11 Troubleshooting Control Link ACCs and the ECT MODBUS Network Unknown The Control Link ACC is not communicating or has not been commissioned Verify the Control Link ACC is powered up wired correctly and has the proper network address baud rate and parity see Section 11 Troubleshooting Control Link ACCs and the ECT MODBUS Network No Port No port is set up in the E2...

Страница 20: ...you want the device to belong to A screen will open that will allow you set the address 7 In the list of MODBUS devices choose the address number corresponding to the Control Link ACC s dip switch jumper setting and press to select it If a network ID has already been selected its name will be shown next to the network ID in this list If the network ID you are trying to assign has already been used...

Страница 21: ...erial Configuration Manager to be a MODBUS port Follow the instructions in Section 7 2 1 Setup Network Ports on page 11 Wrong FW Rev This message is likely caused by the Control Link ACC having a firmware version older than the minimum revision required by E2 for communication Replace the Control Link ACC with a new controller that has the latest version of firmware on it 7 3 Wiring Types Emerson ...

Страница 22: ...on For example if the conductor wire colors are BLACK and WHITE use BLACK for all 485 terminals and WHITE for all 485 terminals or vice versa Connect the bare SHIELD wire to the center Shield terminal 0V terminal on the E2 7 4 3 Step 3 Set the Network Address Depending on the hardware revision the Control Link ACC board has either eight dip switches or eight three pin jumpers located in between th...

Страница 23: ...nk ACC Network ID Dip Switch Jumper Settings Figure 7 15 Control Link ACC Network Baud Rate Parity Dip Switch Jumper NOTE If you are networking Control Link ACC only for purposes of sharing a dewpoint sensor you do not need to set a baud rate or parity Set all dip switches or jumpers to the DOWN OFF position This will allow the Control Link ACC to share a dewpoint sensor as long as the network is ...

Страница 24: ...ound 7 4 6 Step 6 Connect a Dewpoint Sensor to Control Link ACC s on the Network Once the Control Link ACCs are networked and properly terminated the only step remaining to allow the Control Link ACCs to share a dewpoint sensor is to connect at least one dewpoint sensor to one Control Link ACC on the network Any Control Link ACC on the network can be configured with the dewpoint sensor Each Contro...

Страница 25: ...of the dewpoint sensor to determine the target temperature of the door frame For example if the current dewpoint is 5 C 41 F and the button is set to a medium offset of 2 C 3 6 F the Control Link ACC will control the heaters to achieve a door frame temperature of 7 C 44 6 F As the dewpoint rises and falls the door frame temperature setpoint will also rise and fall so that the door frame temperatur...

Страница 26: ... MODBUS or dewpoint sensor wiring For Control Link ACCs that do not have dewpoint sensors directly connected to them verify the Status LED is blinking once every 2 seconds to indicate status is OK If this LED blinks in a repeating pattern of three short blinks it means the Control Link ACC is not receiving a dewpoint sensor value broadcast over the network There may be a problem with the MODBUS or...

Страница 27: ...nector Enter Key LCD Numeric keypad Function Key F1 External Power Connector 9 12 VDC Period and Minus Keys 5 6 13 Function Key F2 Right Arrow Down Arrow Cancel Key 12 14 Left Arrow Key Functions F1 Key Returns you to the Home Screen F2 Key Takes you to the Main Menu Enter Saves your settings into the memory Cancel Clears Erases texts in the editable field cancels overrides Left Arrow Selects the ...

Страница 28: ...mmand to switch the MODBUS port into a dumb HHT port to view and set ACC information like a standard HHT It can be used to update firmware for the attached ACC 8 4 Connecting the HHT Adapter Board The HHT Adapter Board is connected on the low voltage end of the ACC using a standard Belden 8761 cable shown in Figure 8 3 The Hand Held Terminal plugs into the RJ11 jack on the HHT Adapter Board Press ...

Страница 29: ...you must be directly connected to the HHT ONE ON ONE connection type no other nodes connected to the network See Section 8 5 8 for details If setting the address via the dip switches set the address to match the dip switch numbering in the HHT Network Setup Screen ADDR 1 Selecting option 2 ACC HHT MODE will lead you to the Network Setup screen The network screen will display the baud rate ad dress...

Страница 30: ... Screen DUTY CYCLE 34 OVR NO 00 SAVINGS 62 OVR SRC HHT DUTY CYCLE The current output condition OVR and Active heater output override YES or NO and percentage OVR SRC Source of the current override HHT or REMOTE SAVINGS The percentage of time the heater has been off This field may be reset by selecting it and pressing cancel 8 5 6 ACC Configuration Screens All of the configuration of the ACC may be...

Страница 31: ...Board temperature will shutdown the output heater if greater than 212 F 100 C Two modes can be selected for the temperature offset Closed Loop and Open Loop Closed Loop Closed Loop is the default that uses the Door Temperature feedback OFFSET SRC Specifies the source of the set point offset REM Remote means it takes the offset reported over ModBus network PRG Program means it uses the offset confi...

Страница 32: ...ectly to one and only one ACC From the Home screen choose 2 ACC HHT mode choose the address and press down arrow The user can also set the baud and parity 19200 and no parity is recommended Pressing the down arrow may show you the next screen if the HHT doesn t find an ACC at that selected address The HHT will ask if you are connected to the ACC that you wish to communicate with directly the user ...

Страница 33: ...7 8 5 9 Exit HHT Mode To exit a current mode on the HHT unplug and reconnect cycle power or press down the F1 key for 6 seconds This will return you to the HHT home screen where you can access the ACC HHT Mode option Select the address of the ACC you wish to access ...

Страница 34: ...ove its maximum rating at which time the heater will be turned OFF This is the OVER TEMP failure condition see Section 10 Error Modes Once the heat driver temperature drops 5 C 9 F it will be allowed to come back ON This back off strategy will only come into affect if the heater has to be ON 100 you are running at the maximum rated current you are at maximum rated ambient for the ACC 9 1 ControlLi...

Страница 35: ...network connection the TX and RX LEDs blink to indicate transmission and receipt of network messages On a properly networked Control Link ACC the RX LED should blink about once every 15 seconds If a Control Link ACC has a dewpoint sensor you should also see the TX LED blink If these LEDs do not blink there may be a problem with the MODBUS network connection ...

Страница 36: ...mes pause 5 times pause and then repeats 10 2 Priority 2 FAIL TEMP SENS If the PMAC Algorithm mode is NOT enabled a door frame temperature sensor that is open or shorted is considered to be a failure The General Status LED blinks 2 times pause 2 times pause and then repeats If the PMAC Algorithm is enabled the General Status LED will continue to blink normally even if the door frame temperature se...

Страница 37: ... stop bits 1 3 Make sure Control Link ACCs were commissioned Press followed by on the E2 front panel and verify the offline Control Link module has a non zero number in its Node Board field If the number in the Node Board field is zero 0 highlight the controller name and select SET ADDRESS followed by Select Address Then select the network ID that matches the setting on the network address DIP swi...

Страница 38: ...Watt 0 92 F Watt 40 C to 40 C 40 F to 104 F up to 26A with additional heat sink with max thermal resistance of 0 51 C Watt 0 92 F Watt 40 C to 65 C 40 F to 149 F up to 18A with additional heat sink with max thermal resistance of 0 51 C Watt 0 92 F Watt Input Voltage 120 240 Nominal 102VAC to 264VAC 50 60 Hz Humidity 5 to 95 non condensing Door Frame Temp Sensor 0 4 C of 0 to 80 C 72 F of 32 F to 1...

Страница 39: ...5 Dewpoint Sensor 281 0001 Door Frame Temperature Sensor included with ACC Kits 1 4 listed below 815 6101 ACC Kit 1 Control Link ACC 10Amp and Door Frame Temp Sensor 815 6106 ACC Kit 2 Control Link ACC 30Amp and Door Frame Temp Sensor 815 6102 ACC Kit 3 Control Link ACC 10Amp Door Frame Temp Sensor and Dewpoint Sensor 815 6107 ACC Kit 4 Control Link ACC 30Amp Door Frame Temp Sensor and Dewpoint Se...

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Страница 42: ...Inc and or its affiliates collectively Emerson reserves the right to modify the designs or specifications of such products at any time without notice Emerson does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user 026 4704 Emerson is a trademark of Emerso...

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