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28
9.8 - Setup and wiring: Allen-Bradley
®
PowerFlex
®
4, 4M, & 40 VFDs (Powerfoil
®
& Wickerbill fans)
WARNING: The fan controllers contain high voltage capacitors that take time to discharge after removal of mains supply.
Before working on the fan controller, ensure isolation of mains supply from line inputs at the fan controller’s disconnect if
installed. Wait three (3) minutes for capacitors to discharge to safe voltage levels. Failure to do so may result in personal
injury or death. Darkened display LEDs are not an indication of safe voltage levels.
Parameter changes are required for proper operation
. These parameter changes are as follows:
WARNING: Before making parameter changes, ensure that the "RUN" LED is off on the fan controller.
To change fan parameters:
1.
Press on the fan controller to enter programming mode.
2.
Press or to toggle between groups A, d, and P. Toggle to group P.
3.
Press or to enter group P parameter selection.
4. Press or to display parameter P036.
5. Press or to view the current setting.
6.
Press or to change the setting to 5.
7.
Press to save the change.
8. Press once to return to group P parameter selection, twice to return to group selection, or three times to exit programming
mode. Exiting programming mode returns the VFD to the normal operating screen. Repeat the steps above to navigate to and
change the remaining required parameters.
Final connections
1. Disconnect AC mains power from the fan via the rotary disconnect or AC mains circuit breaker, then wait for a darkened LED display
on the VFD.
2. Install the Modbus cable in the enclosure with the appropriate fitting, e.g. cord grip connector or EMT connector.
3. Connect the data cable as shown on the following page. Pay special attention to polarity for MBA, MBB.
Note: It is helpful to plug the
data port screw terminal block into the drive prior to termination. BE MINDFUL of the tightening torque. The VFD's data port can be
damaged by excessive force applied on the screw heads. The cable shield's drain lead and reference line (if present) connect to the
VFD's RS-485 shield terminal (terminal #16 on PowerFlex
®
4 and PowerFlex 4M, terminal #19 on PowerFlex 40).
4. Reapply power to the fan.
Note: The following actions will result in a communications loss and subsequent fan shutdown:
• Gateway power loss
• Modbus data loop wire break
PowerFlex
®
4 & 40
PowerFlex
®
4M
Default setting
Change to
Description
P036
P106
1
5
Start Source, Comm Port
P038
P108
1
5
Speed Reference Source, Comm Port
A104
C303
1
1–32
Comm Node Address (must be unique to fan)
A105
C304
0
2
Comm Loss Action; Controlled Stop
A106
C305
5.0 sec
60.0 sec (max) Comm Loss Time
A107
C306
0
1
Modbus RTU (8,E,1)
9 - Big
Ass
Fans Electrical Installation (cont.)
Sel
Sel
Esc
