0502 061 169 klimatyzacja chłodnictwo

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May 7, 2008 on 6:50 pm | In Uncategorized, klimatyzacja, serwis, konserwacje, cooling air-conditioning |

CONTROL AND MODBUS COMMUNICATION
APPENDIX TO THE LG iC5 MANUAL

THE FOLLOWING MANUAL ASSUMES THAT, THE READER IS AWARE OF TECHNICAL DOCUMENTATION INCLUDED TO THE VTS AIR HANDLING UNIT (AHU).

THIS MANUAL CONSIDERS ONLY THE CONTROL AND COMMUNICATION CIRCUITS.

THE INSTALLATION OF THE FREQUENCY CONVERTER AND INSTALLATION OF MAINS AND MOTOR CABLES SHOULD BE DONE ACCORDING TO THE LG iC5 MANUAL.

OPTION 1. AHU NOT EQUIPPED WITH VTS CLIMA AUTOMATION SYSTEM

1.1. Local control using integrated control panel
- Set all parameters listed in Table No.1
- Set additional parameters:
Name of the parameter Code Value
Group DRV: Source of control DRV 0
Group DRV: Source of frequency reference Frq 0
Group DRV: Acceleration time ACC *
Group F: Stop mode select F4 2

- Use the RUN and STOP/RST buttons to control the drive
- Use the built-in potentiometer to set the frequency reference

1.2. Remote control with two speeds
- Set all parameters listed in Table No.1
- Set additional parameters:
Name of the parameter Code Value
Group DRV: Source of control DRV 1
Group DRV: Constant speed No.1 St1 *
Group DRV: Constant speed No.3 St3 *
Group DRV: Acceleration time ACC *
Group F: Stop mode select F4 2
Group I: Function P2: Constant speed L selection I21 5
Group I: Function P3: Constant speed M selection I22 6

- Wire the I/O terminal of the iC5 inverter according to the Figure No.1

iC5; I/O terminal
P1 Forward run command P1 P2 P3 Drive function

P2 Multi-step freq. LOW 0 0 0 STOP

P3 Multi-step freq. MID 1 1 0 START, low speed

CM GND 1 1 1 START, high speed

Figure No.1

OPTION2. EXHAUST UNIT EQUIPPED WITH VTS CLIMA AUTOMATION SYSTEM

- Set all parameters listed in Table No.1
- Set additional parameters:
Name of the parameter Code Value
Group DRV: Source of control DRV 1
Group DRV: Constant speed No.1 St1 *
Group DRV: Constant speed No.3 St3 *
Group DRV: Acceleration time ACC *
Group F: Stop mode select F4 2
Group I: Function P2: Constant speed L selection I21 5
Group I: Function P3: Constant speed M selection I22 6

- Wire the I/O terminal and the terminal X4 of the control gear SCK according to the Figure No.2

SCK; X4 2U1; I/O terminal
P1 Forward run command P1 P2 P3 Drive function

X4:2 P2 Multi-step freq. LOW 0 0 0 STOP

X4:3 P3 Multi-step freq. MID 1 1 0 START, low speed

X4:1 CM GND 1 1 1 START, high speed

Figure No.2

OPTION3. AHU EQUIPPED WITH VTS CLIMA AUTOMATION SYSTEM BASED ON PDA

3.1. Wiring instruction – Figure No.3

SCK; I/O CARD; TERMINAL X3
X3:43 X3:44 X3:46 X3:47 A B GND A B GND

X1:DI1 X1:DCOM1 X1:DI1 X1:DCOM1 P N GND P N GND
1U1;I/O terminal 2U1;I/O terminal 1U1;Modbus Board 2U1;Modbus Board

Figure No.3

NOTE! In case of the PDA-based automation system, it is strongly recommended to use the automatic Form No.2 of the FCconfig application in order to apply the settings to the inverter.

3.2. Automatic configuration of the exhaust fan drive - FCW

NOTE! The communications cable should be disconnected from the supply drive – FCN.

1. In Form No.2 mark:
- LG iC5 – on the drive selection list
- Exhaust – drive function selector
- Motor type from the nameplate – on the motor selection list
2. Start the data transmission by pushing Apply button
3. Turn off the control gear by means of the main switch and wait until the displays of both inverters fade.

3.3. Automatic configuration of the supply drive – FCN
1. Connect the communications cable to the supply drive – FCN.
2. Turn on the control gear.
3. In Form No.2 mark:
- LG iC5 – on the drive selection list
- Supply – drive function selector
- Motor type from the nameplate – on the motor selection list
2. Start the data transmission by pushing Apply button

3.4. Manual configuration of the inverters
If any communication errors occurred during the automatic configuration of the inverters, the Form No.1 of the FCconfig application shall be used. The mentioned form allows the user to set all parameters one by one, or to set only those parameters, which caused the communication errors. The complete list of parameters, that have to be set to ensure full compatibility with the PDA, consists of basic parameters listed in Table No.1 and additional parameters listed in Table No.2 in columns marked with FCN and FCW (supply and exhaust drive, respectively). In Form No.1 the Offset should be set to –1 or the LG iC5 should be chosen from the selection list. The Parameter means the Modbus address of the parameter.

3.5. Termination of the RS485 bus
In case of using long communication cable (more than 100m) the signal reflections may influent the communication reliability. The user can avoid that effect by connecting a termination resistors at both ends of the communication bus. The LG iC5 inverter is equipped with built-in terminating resistor, that can be activated by closing the dip-switch JP1 placed on the Modbus board, next to the communication terminal.

NOTE! The detailed description of the proper termination and biasing of the Modbus communication line is available at:

http://ftpservice.vtsclima.com/Docs_&_manuals/Info/Long distance communication problem/

Table No.1
BASIC PARAMETERS
COMMON FOR ALL METHODS OF CONTROL
No. Name of the parameter Code Modbus address Value Description
1 Number of motor poles H31 33567 ** 2-12
2 Motor rated slip H32 33568 *** unit 0,01Hz
3 Motor rated current H33 33569 ** unit: 0,1A
4 No-load motor current H34 33570 *** unit: 0,1A
5 Motor rated efficiency H36 33572 ** unit: 1%
6 RPM conversion factor H74 33610 *** unit: 1
7 Motor rated frequency F22 33202 ** unit: 0,01Hz
8 Maximum output frequency F21 33301 100,0 unit: 0,01Hz
9 U/f ratio F30 33310 1 Square
10 Motor thermal protection F50 33330 1 Active
11 Maximum current for 1 minute F51 33331 150 unit: 1%
12 Maximum constant current F52 33332 100 unit: 1%
13 Deceleration time DEc 0008 20,0 unit: 0,1s

NOTE! The values send by FCconfig application depend on the given „unit”. Example: the motor’s rated current is 7.3A; the unit is 0.1A; so in the field Value put 73.

Table No.2
ADDITIONAL PARAMETERS
FOR USE IN AUTOMATION SYSTEM BASED ON THE PDA
No. Name of the parameter Code Modbus address FCW FCN
1 Source of control Drv 33027 1 1
2 Source of frequency reference Frq 33028 8 8
3 Stop mode select F4 33284 2 2
8 Modbus address I60 33852 2 1

* Parameter values to be assumed by the user
** Parameter values to be read in the motor nameplate
*** Parameter values to be calculated: