Emerson SP3403 - Actual Switching Frequency; Drive Mode; Security Unlock

Safety
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Diagnostics
110 Unidrive SP Regen Installation Guide
www.controltechniques.com Issue Number: 2
Pr 5.37 shows the actual switching frequency used by the inverter. The maximum switching frequency is set with Pr 5.18, but this may be reduced by
the drive if automatic switching frequency changes are allowed (Pr 5.35=1).
Pr 5.49 and Pr 5.50 are not visible from the keypad and are intended for internal use by the drive.
5.37 Actual switching frequency
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
11111
Default Regen 0 to 7
Update rate
Background Write
Value String
Switching frequency
(kHz)
Current controller
Sample time (us)
0 3 3 167
1 4 4 125
26 6 83
3 8 8 125
412 12 83
5 16 16 125
6 6 rEd 6 167
7 12 rEd 12 167
5.49 Drive mode
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111111
Default Regen 0 to 4
Update rate
Background read
5.50 Security unlock
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111111
Default Regen 0 to 999
Update rate
Background read
Parameter Function
5.49
Holds the actual drive mode that is active. The user can change the required drive mode in
Pr 11.31, but the value in Pr 11.31 is only copied to this parameter when the drive mode is
changed.
5.50
Holds the value of the security entered to allow parameters to be edited when security is
enabled.