External Trip/Drive Reset; No. Of Auto-Reset Attempts; Auto-Reset Delay; Hold ‘Drive Ok’ Until Last Attempt - Emerson 2202 Advanced User's Manual

Parameter
Menu 10 Introduction
x.00
Therefore full power braking period (Pr 10.31) Tp = E / P
The resistance of the braking resistor R, the total energy E and the average power P
Pr 10.30 and Pr 10.31.
The temperature of the resistor is monitored by the braking energy accumulator (Pr 10.39). When this parameter reaches 100% the drive will trip if
Pr 10.37 is 0 or 1, or will disable the braking IGBT until the accumulator falls below 95% if Pr 10.37 is 2 or 3. The second option is intended for
applications with parallel connected DC buses where there are several braking resistors, each of which cannot withstand full DC bus voltage
continuously. The braking load will probably not be shared equally between the resistors because of voltage measurement tolerances within the
individual drives. However, once a resistor reaches its maximum temperature its load will be reduced, and be taken up by another resistor.
10.32 External trip
Bit SP
Coding
1
Range OFF(0) or On(1)
Default OFF(0)
Update rate Background
If this flag is set to On(1) then the drive will trip (Et). If an external trip function is required, a digital input should be programmed to control this bit (see
section 10.9 Menu 8: Digital inputs and outputs on page 109).
10.33 Drive reset
Bit SP
Coding
1
Range OFF(0) or On(1)
Default OFF(0)
Update rate 21 ms
An OFF to On change on this parameter will cause a drive reset. If a drive reset terminal is required on the drive the required terminal must be
programmed to control this bit.
10.34

No. of auto-reset attempts

Bit SP
Coding
Range 0 to 5
Default 0
Update rate Background
10.35

Auto-reset delay

Bit SP
Coding
Range 0.0 to 25.0 s
Default 1.0
Update rate Background
If Pr 10.34 is set to zero then no auto reset attempts are made. Any other value will cause the drive to automatically reset following a trip for the
number of times programmed. Pr 10.35 defines the time between the trip and the auto reset (this time is always at least 10s for OI.AC, OI.br trips,
etc.). The reset count is only incremented when the trip is the same as the previous trip, otherwise it is reset to 0. When the reset count reaches the
programmed value, any further trip of the same value will not cause an auto-reset. If there has been no trip for 5 minutes then the reset count is
cleared. Auto reset will not occur on UU, Et, EEF or HFxx trips. When a manual reset occurs the auto reset counter is reset to zero.
10.36 Hold 'drive ok' until last attempt
Bit SP
Coding
1
Range OFF(0) or On(1)
Default OFF(0)
Update rate Background
If this parameter is OFF(0) then Pr 10.01 (Drive ok) is cleared every time the drive trips regardless of any auto-reset that may occur. When this
parameter is set, the 'drive ok' indication is not cleared on a trip if an auto-reset is going to occur.
Once all the resets have occured, the reset counter is reset to 0. To activate again, a manual reset is required.
136
Parameter Keypad and
description format display
av
FI DE Txt VM DP ND
FI DE Txt VM DP ND
FI DE Txt VM DP ND
FI DE Txt VM DP ND
1
FI DE Txt VM DP ND
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Serial CT Modbus PLC Ladder
communications RTU programming
can normally be obtained for the resistor and used to calculate
av
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Advanced parameter
CTSoft Menu 0
PS
PS
PS
1
PS
1
PS
Commander SK Advanced User Guide
Issue Number: 9
descriptions