Kulik, Mark
BACnet & Modbus Interface Quick Start Guide
Quick Guide MELCO-BEMS-MINI V 1.5.0 BACnet & Modbus Interface Quick Start Guide
Version 1.5.0
Table of Contents
Quick Start with Software Tool ..................................................................................................................... 2 Software Tool Additional Configuration ....................................................................................................... 6 Procon MelcoBEMS MINI (A1M) Information .............................................................................................. 9
Introduction .............................................................................................................................................. 9 Requirements............................................................................................................................................ 9 Default Settings......................................................................................................................................... 9 Procon MelcoBEMS MINI (A1M) Configuration Manager Tool Information .............................................. 10 Introduction ............................................................................................................................................ 10 Requirements.......................................................................................................................................... 10 Appendix: .................................................................................................................................................... 11 DIP switch settings: ................................................................................................................................. 11
RS-485 MAC Addressing:..................................................................................................................... 11 Communication Settings: .................................................................................................................... 11 Protocol selection: .............................................................................................................................. 11 Deadband mode:................................................................................................................................. 11 RS-485 Termination: ............................................................................................................................... 12 Status LEDs:............................................................................................................................................. 12 Points List: ............................................................................................................................................... 13 BACnet Object List: ............................................................................................................................. 13 Modbus Table Air-to-Air Systems: ................................................................................................... 14
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Quick Start with Software Tool
1. Download software from MyLinkDrive.com under the PAC-UKPRC001-CN-1 support page software section a. http://meus1.mylinkdrive.com/item/PAC-UKPRC001-CN-1.html
2. Install the MelcoBEMS MINI (A1M) Configure Manager software tool a. Ensure the power is turned off for the Mitsubishi Electric outdoor and indoor units of the system that will be integrated.
3. Before configuring the BACnet & Modbus Interface device, the third party building/home automation system contractor needs to supply the MAC address, device instance number, baud rate and any other network settings needed for the RS-485 communication network.
4. Make sure dip switches 1, 6, and 7 are ON and the remaining dips switches are OFF when trying to connect to the configuration tool software. Figure 1 shows the correct dip switch position for this step.
Figure 1
5. Connect the BACnet & Modbus Interface device to connector CN105 on the PCB of the powered off Mitsubishi Electric unit that will be integrated. a. If there are more than one interfaces, continue to plug in the remaining interface devices into the CN105 on the PCB of a powered off Mitsubishi Electric unit.
6. Wire the USB to RS-485 adapter (Figure 2) (+) and (-) terminals to the BACnet & Modbus Interface terminal block respected terminals together with 120 ohm termination resistors at each end.
Figure 2
7. Power up the system. a. Make sure USB to RS-485 adapter is plugged into USB COM port of the computer that has the MelcoBEMS MINI (A1M) Configure Manager software tool before powering up the system.
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8. Open the MelcoBEMS MINI (A1M) Configure Manager software by using the shortcut created on the desktop. Figure 3 is the software shortcut icon.
Figure 3
a. Figure 4 is the window that opens up when opening the software tool.
Figure 4
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9. Click the button, "Connect" a. Figure 5 is the window that will open.
Figure 5
10. To find what COM port number the computer assigned the USB adapter; refer to step 1 in the Software Tool Additional Configuration section (page 6). a. Note: Recommended COM Port setting for the Software tool is COM 1-9. b. To change COM Port settings, refer to step 2 in the Software Tool Additional Configuration section (page 7).
11. After the correct COM port number has been selected, click the button "Connect". Figure 6 is the BACnet Settings window that will open when connected to the BACnet & Modbus Interface device.
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Figure 6
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a. If unable to connect to the BACnet & Modbus Interface device, look back at the previous steps. i. Verify dip switches are set correctly ii. Verify wiring polarity is correct iii. Verify computer USB COM port is correct
12. Enter the settings for each interface into the BACnet Settings window provided by the third party building/home automation system contractor.
13. Click the button "Write Settings" in the lower right hand corner after all the settings have been entered correctly. You will see the Right LED (RS-485 ACK) light blink when clicking the "Write Settings" button.
14. After all interfaces have been configured, power down the system and set the dip switches accordingly to site requirements. a. When ALL dip switches 1 5 are set to the ON position, the BMS system sees the device MAC address that is set in the software. i. Refer to Appendix section (page 11) for additional information on dip switch positions. b. Wire all interfaces to the master controller following the BACnet or Modbus communication wiring protocols. i. 2 termination resistors (typically 120 ohms) are required at the start and end of the communication bus.
15. Power up the system. 16. Check each interface to see if there is communication with the indoor unit and master controller
by looking at the two acknowledgement LEDs a. Left LED (AC ACK) confirms power and communication to indoor unit by blinking. b. Right LED (RS-485 ACK) confirms RS-485 communication by blinking. i. If the right LED is solid and not blinking, the device is not communicating with the BMS system. Once communication has been established, the RS-485 ACK light will start blinking. 1. Verify the device settings are setup correctly. 2. Verify the device is added to the BMS system network. 3. Verify RS-485 wiring.
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Software Tool Additional Configuration
1. To find what COM port number the computer registered the USB adapter, use the following steps: a. Open Control Panel and select Device Manager (Figure 7).
Figure 7
b. In Device Manager, Expand the Ports section (Figure 8).
Figure 8
c. Highlighted in Figure 8 is the COM port the computer assigned the USB adapter.
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2. The following steps will show how change the COM port number of the USB to RS-485 adapter connected to the user's computer. Note: Recommended COM port setting for the Software tool is COM 1-9. a. Repeat steps 1a and 1b on the previous page (page 6). b. Double click the adapter listed under Ports. The properties window will open (Figure 9).
Figure 9
c. Go to the Port Settings Tab (Figure 10).
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Figure 10
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d. Click the button labeled "Advanced" to open the settings window. The COM Port Number can be adjusted via the drop down box shown on Figure 11:
Figure 11
e. After selecting the new COM port number, just hit the "OK" button.
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Procon MelcoBEMS MINI (A1M) Information
Figure 12
Introduction
The BACnet & Modbus Interface (PAC-UKPRC001-CN-1 labeled: Procon MelcoBEMS MINI (A1M)) (Figure 12) can be quickly installed and addressed through dip switches located on the side of the interface. There is no need to configure network settings if the default settings can be used with the third party master controller.
Requirements
BACnet & Modbus Interface Field supplied: 2 conductor with ground wire, and 2 termination resistors (typically 120 ohms)
Default Settings
1. Set the dip switches accordingly to site requirements. Third party building/home automation
system contractor needs to supply the MAC address, device instance number, baud rate and any
other network settings needed for the RS-485 communication network.
a. Dip switches 1-5 need to be adjusted to have a unique MAC address per interface.
(See the Appendix section (page 11) DIP switch settings sub section RS-485 addressing)
b. Dip switch 7 needs to be turned OFF to allow BACnet MS/TP or ON for Modbus RTU.
(See the Appendix section (page 11) DIP switch settings sub section Protocol selection)
c. Default settings: (not changeable via dip switches)
i. Device Instance = 1
iv. Max Info Frames = 1
(aka Station ID, Network# )
v. Max Master
= 32
ii. Baud rate
= 9600
vi. APDU Timeout = 5 ms
iii. Parity Type
= None
vii. APDU Retires
= 3
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Procon MelcoBEMS MINI (A1M) Configuration Manager Tool Information
Figure 13
Figure 14
Introduction
The BACnet & Modbus Interface (PAC-UKPRC001-CN-1, labeled: Procon MelcoBEMS MINI (A1M)) (Figure 12) can be configured using the MelcoBEMS MINI (A1M) Configuration Manager (Figure 13) to change the address and network settings to help save time and meet application requirements. Refer to the Quick Start with Software Tool section (starting on page 2) for the step-by-step on how to configure the BACnet & Modbus Interface device using the software.
This software will be used to help adjust advanced RS-485 network settings from a computer. The following settings can be adjusted from the software tool:
Device Instance (aka: Station ID, Network)
Baud Rate Parity Type Software Selectable MAC Address
(aka: Device Address)
Max Info Frames Max Master APDU Timeout APDU Retires
Requirements
MelcoBEMS MINI (A1M) Configure Manager software (Figure 13) o http://meus1.mylinkdrive.com/item/PAC-UKPRC001-CN-1.html
USB to RS-485 adapter o Most commonly found adapters will fulfill this requirement. (Figure 14)
BACnet & Modbus Interface (Powered from Mitsubishi Electric Indoor unit) Field supplied: 2 conductor with ground wire, and 2 termination resistors (typically 120 ohms)
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Appendix:
DIP switch settings:
RS-485 MAC Addressing:
Any address in the range 1 30 can be chosen using dip switches 1 5. The address is set in binary,
where the switch positions have the following values on Table 1:
DIP switch number Value when switch is set to ON
1
1
2
2
3
4
4
8
5
16
Table 1
To get the address, add together the value for each switch set ON.
For example, to set address 13, set DIP switches 1, 3 and 4 ON (1 + 4 + 8 = address 13).
When ALL dip switches 1 5 are set to the ON position, the BMS system sees the device MAC address
that is set in the software. (See Modbus Holding Registers section)
Note: When ALL dip switches 1 5 are set to the OFF position an address of 1 is assumed.
Note: Each MelcoBEMS MINI connected on the same RS-485 network must be set to a unique MAC
address and instance number.
Communication Settings:
The RS-485 communication settings are set by using DIP switch 6.
When the DIP switch is in the OFF position the Baud Rate and Parity settings are set in software.
(See Modbus Holding Register section). Refer to Table 2 for dip switch breakdown.
DIP switch 6 RS-485 communication settings
OFF
Baud Rate and Parity set in software
ON
9600 baud, no parity
Table 2
Note: The number of data bits is fixed at 8 and the number of stop bits is fixed at 1.
Protocol selection:
The RS485 protocol is set by using DIP switch 7. Refer to Table 3 for dip switch breakdown.
DIP Switch 7 Protocol selection
OFF
BACnet MS/TP
ON
Modbus RTU
Table 3
Deadband mode:
The Deadband feature can be enabled using DIP switch 8. Refer to Table 4 for dip switch breakdown.
DIP Switch 8 Deadband feature
OFF
Disabled
ON
Enabled
Table 4
Note: Refer to manual included in the box to learn how Deadband feature works.
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RS-485 Termination:
An RS-485 termination resistor can be enabled on the MelcoBEMS MINI (A1M) PCB using the single
jumper labeled J1. Refer to Table 5 for jumper setting breakdown.
Jumper setting Not fitted Fitted
Description Termination resistor disenabled
Termination resistor enabled
Table 5
Status LEDs:
There are two status LEDs on the MelcoBEMS MINI (A1M). The LED indications are shown on Table 6:
LED Name AC ACK
RS-485 ACK
Color Green
Green
Functionality Lit when A1M is powered, Flashing indicates valid communication with the indoor unit. Lit when A1M is powered, Flashing indicates valid Modbus or BACnet communication.
Table 6
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Points List:
BACnet Object List: Object Type
Binary Output
Binary Input
Analog Value
Object ID
BO0 BI1 AV2
Multi-state Output
MSO3
Multi-state Input
MSI4
Multi-state Output
MSO5
Multi-state Input
MSI6
Multi-state Output
MSO7
Multi-state Input
MSI8
Multi-state Output
Analog Input Analog Output
MSO9*
AI10 AI11
Object Name
Drive OFF/ON Setup Drive OFF/ON State
Setpoint Mode Setup
Mode State
Fan Speed Setup
Fan Speed State
Air Direction Setup
Air Direction State
Temperature Units Inlet Temperature
Fault Code
Notes
0 = Drive OFF 1 = Drive ON 0 = Drive OFF 1 = Drive ON Value in either °C or °F, depending on the Temperature Units setting 1 = Heating 2 = Humidity Reduction 3 = Cooling 4 = Ventilation, clean air operation 5 = Auto Operation 1 = Heating 2 = Humidity Reduction 3 = Cooling 4 = Ventilation, clean air operation 5 = Auto Operation 1 = Auto 2 = Quiet 3 = Weak 4 = Strong 5 = Very Strong (SH i) 1 = Auto 2 = Quiet 3 = Weak 4 = Strong 5 = Very Strong (SH i) 1 = Auto 2 = Position 1 3 = Position 2 4 = Position 3 5 = Position 4 6 = Position 5 7 = Swing 1 = Auto 2 = Position 1 3 = Position 2 4 = Position 3 5 = Position 4 6 = Position 5 7 = Swing 1 = °C 2 = °F Value in either °C or °F, depending on the Temperature Units setting 4-digit fault code
*Please power cycle the MelcoBEMS MINI after changing the Present Value property of this object.
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Modbus Table Air-to-Air Systems: Holding Registers (Analog Outputs)
Register Name
Addr
Modicon Address
Details
Drive Mode
1 = Heating
2 = Humidity Reduction
3 = Cooling
7 = Ventilation, clean air operation
8 = Auto Operation
0
40001 9 = i-see heating operation*
10 = i-see humidity reduction*
11 = i-see cooling*
Temperature Setpoint
1
Fan Speed
2
Air Direction
3
Modbus Slave ID 4
BACnet Station ID
Modbus RS-485 Baud Rate 5
40002 40003 40004 40005
40006
*indicates a read only value, writing this value will have no effect
Temperature value in °C multiplied by 10. e.g. value 200 = 20°C
0 = Auto 2 = Quiet 3 = Weak 5 = Strong 6 = Very Strong (SH i)
0 = Auto 1 = Position 1 2 = Position 2 3 = Position 3 4 = Position 4 5 = Position 5 7 = Swing
Modbus - Values 1-247 valid
BACnet - Values 1-127 valid
0 = 9600 1 = 1200 2 = 2400 3 = 4800 4 = 9600 5 = 14400 6 = 19200 7 = 28800 8 = 38400 9 = 56000 10 = 57600 11 = 115200
BACnet RS-485 Baud Rate
0 = 9600 4 = 9600 6 = 19200 8 = 38400 10 = 57600
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Register Name
RS-485 Parity Type
Drive ON/OFF Room Temperature [READ ONLY]
Fault Code (hex) [READ ONLY]
Firmware Version [READ ONLY]
Modbus Comms Counter [READ ONLY]
Fault Code (decimal) [READ ONLY]
System Type Detected [READ ONLY] Deadband Enabled State [READ ONLY] BMS Room Temp (signed)
BMS Room Temp
BMS Virtual Setpoint
Deadband Heating Setpoint
Deadband Cooling Setpoint
Holding Registers (Analog Outputs)
Addr
Modicon Address
Details
0 = None
6
40007 1 = Even
2 = Odd
7
40008
0 = Drive OFF 1 = Drive ON
8
40009
Temperature value in °C multiplied by 10. e.g. value 200 = 20°C
0x8000 = No error
9
40010
0x6999 = Bad communication with indoor unit (Refer to indoor unit documentation for
description of other fault code values)
10
40011 A1M firmware version
Value of a counter which increments upon
11
40012
every valid Modbus communication received. Value is automatically reset to zero when
value exceeds 65535.
8000 = No error
12
40013
6999 = Bad communication with indoor unit (Refer to indoor unit documentation for
description of other fault code values)
13
40014
0 = ATA 1 = ATW
14
40015
0 = Deadband disabled (DIP switch 8 OFF) 1 = Deadband enabled (DIP switch 8 ON)
15
40016
Signed temperature value in °C multiplied by 10. 0xFF9C = -10°C...0x01F4 = 50°C
16
40017
Signed temperature value in °C multiplied by 10. 0 = 0°C...500 = 50°C
17
40018
Signed temperature value in °C multiplied by 10. 100 = 10°C...400 = 40°C
Temperature in °C (default in 19°C). Value
18
40019 must be at least 2°C lower than the
Deadband Cooling Setpoint.
Temperature in °C (default in 23°C). Value
19
40020 must be at least 2°C higher than the
Deadband Heating Setpoint.
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Register Name
BACnet Device Instance (most significant 16 bits)
BACnet Device Instance (least significant 16 bits)
BACnet Max Master BACnet Max Info Frames BACnet APDU Timeout BACnet APDU Retires
Holding Registers (Analog Outputs)
Addr
Modicon Address
Details
272
40273
Most Significant 16 bits of the 32-bit Device Instance
273
40274
Least Significant 16 bits of the 32-bit Device Instance
274
40275
Maximum number of master to search for
275
40276
276
40277
Timeout value in ms for client requests
277
40278
Number of times to retry after timeout
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Register Name
Room Temperature Fault Code (hex) Firmware Version Modbus Comms Counter
Fault Code (decimal) System Type Detected Deadband Enabled State
Holding Registers (Analog Inputs)
Addr
Modicon Address
Details
0
30001
Temperature value in °C multiplied by 10. e.g. value 200 = 20°C
0x8000 = No error
1
30002
0x6999 = Bad communication with indoor unit (Refer to indoor unit documentation for
description of other fault code values)
2
30004 MelcoBEMS MINI (A1M) firmware version
Value of a counter which increments upon
3
30006
every valid Modbus command received. Counter is reset to zero when value exceeds
65535.
8000 = No error
8
30009
6999 = Bad communication with indoor unit (Refer to indoor unit documentation for
description of other fault code values)
9
30010
0 = ATA 1 = ATW
10
30011
0 = Deadband disabled (DIP switch 8 OFF) 1 = Deadband enabled (DIP switch 8 ON)
Register Name
Drive On/Off
(Note: Holding register address 7 can also be used to change the Drive)
Coils (Digital Outputs)
Addr
Modicon Address
0
00001
0 = Drive OFF 1 = Drive ON
Details
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