Conecting a brake resistor – Beijer Electronics BFI-P2 V1.21 User Manual
Page 26
User Guide Revision 1.12
www.beijerelectronics.com
26
4.10.10. Enabling the “STO” Function
The “STO” function is always enabled in the drive regardless of operating mode or parameter changes made by the user
.
4.10.11. Testing the “STO” Function
Before commissioning the system the “STO” function should always be tested for correct operation, this should include the following tests:
• With the motor at standstill, and a stop command given to the drive (as per the start source method selected in P1‐13):
o
De‐energise the “STO” inputs (Drive will display ““InHibit”).
o
Give a start command (as per the start source method selected in P1‐13) and check that the drive still displays “Inhibit” and
that the operation is in line with the section 4.10.4 “STO Operation” and section 4.10.5 “STO” Status and Monitoring
• With the motor running normally (from the drive):
o
De‐energise the “STO” inputs
o
Check that the drive displays “InHibit” and that the motor stops and that the operation is in line with the section and section
4.10.12. “STO” Function Maintenance.
The “STO” function should be included within the control systems scheduled maintenance program so that the function is regularly tested for
integrity (Minimum once per Year), furthermore the function should be integrity tested following any safety system modifications or
maintenance work.
If drive fault messages are observed refer to section Error! Reference source not found.”Error! Reference source not found.” for further
guidance.
4.11. Conecting a Brake Resistor
Beijer Frequency Inverter P2 units feature an internal brake transistor, fitted as standard for all frame Size 2 – 5 models, and optionally on larger
frame sizes. The brake resistor should be connected to the DC+ and BR Terminals of the drive.
The brake transistor is enabled using P6‐19.
Software protection against brake resistor overload is carried out within the drive. For correct protection
•
Set P1‐14 = 201
•
Enter the resistance of the brake resistor in P6‐19 (Ohms)
•
Enter the power of the brake resistor in P6‐20 (kW)