Diagnostics Optimization CT MODBUS RTU Technical Data
250
E300 Design Guide
Issue Number: 1
resistor.
Braking Resistor Thermal Time Constant
(
D16
) =
≥
= E / P
The braking resistor is protected with a single time constant model as shown below:
The drive monitors the power flowing into the braking resistor and updates the
Braking Resistor Thermal Accumulator
(
D17
). If bit 1 of
Action On Trip
Detection
(
H45
) = 0 and the accumulator reaches 100 % a Brake R Too Hot trip is initiated. If bit 1 of
Action On Trip Detection
(
H45
) = 1 and the
accumulator reaches 100 % the braking IGBT is disabled until the accumulator falls below 95.0 %.
See
Braking Resistor Rated Power
(
D15
).
See
Braking Resistor Rated Power
(
D15
).
See
Braking Resistor Rated Power
(
D15
).
D16
Braking Resistor Thermal Time Constant
Mode
Open Loop, RFC-A, RFC-S
Minimum
0.000
Maximum
1500.000
Default
0.000
Units
%
Type
32 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
3
Coding
RW
D17
Braking Resistor Thermal Accumulator
Mode
Open Loop, RFC-A, RFC-S
Minimum
0.0
Maximum
100.0
Default
Units
%
Type
16 Bit Volatile
Update Rate
Background Write
Display Format
Standard
Decimal Places
1
Coding
RO, ND, NC, PT
D18
Braking Resistor Resistance
Mode
Open Loop, RFC-A, RFC-S
Minimum
0.00
Maximum
10000.00
Default
0.00
Units
Ω
Type
32 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
2
Coding
RW
D19
Braking IGBT Lower Threshold
Mode
Open Loop, RFC-A, RFC-S
Minimum
-VM_DC_VOLTAGE_SET
Maximum
VM_DC_VOLTAGE_SET
Default
See exceptions below
Units
V
Type
16 Bit User Save
Update Rate
4 ms read
Display Format
Standard
Decimal Places
0
Coding
RW, VM
1 – e
-t/
τ
100%
Braking Resistor Rated Power (
D15
)
D17
Braking Resistor
Thermal
Accumulator
Power into
braking
resistor
Braking resistor protection system
Summary of Contents for 03200106
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