Emerson E300 Series Design Manual page 316

Advanced elevator drive / dedicated elevator variable speed ac drive for induction and permanent magnet motors
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Safety
Product
Mechanical
information
information
installation
V1 Creep speed to V10 speed reference selected
Direction signal
Fast stop enable (H26)
When this feature is enabled floor sensor correction and direct to floor using a stop input is disabled.
H27
Rapid Slow Down Enable
Mode
Open-Loop, RFC-A, RFC-S
Minimum
0
Default
0
Type
1 Bit User Save
Display Format
Standard
Coding
RW
When set to Off (0), rapid slow down is disabled.
When set to On (1), and Elevator Control Mode (H19) = Creep To Floor (0), Peak Curve Enable (G41) = Off (0) (peak curve is disabled), rapid slow
down is enabled. This mode of operation is intended for Creep to floor elevator controllers that do not handle peak curve operation, where under
normal circumstances the selected speed is reached prior to slowing to the creep speed defined by Creep Speed Select (G52).
Under emergency conditions the elevator controller may request the elevator drive to slow down before constant speed is reached i.e. during
acceleration, and under these circumstances when Rapid Slow Down Enable (H27) = On (1), the profile is modified such that the speed will not
increase further, and Fast Stop Deceleration Rate (G29) is used and a fixed 200ms jerk is applied, to bring the elevator car to the creep speed defined
by Creep Speed Select (G52) as rapidly as possible. The creep speed defined by Creep Speed Select (G52) is used until the elevator controller
deselects it.
H28
Freeze Protection Threshold
Mode
Open-Loop, RFC-A, RFC-S
Minimum
-10
Default
0
Type
16 Bit User Save
Display Format
Standard
Coding
RW
This parameter is used to define the threshold level for a temperature monitoring trip to be generated. If either of the following drive temperature
levels, Monitored Temperature 1 (J71), Monitored Temperature 2 (J72) or Monitored Temperature 3 (J73) reaches or falls below the threshold value
on completion of the travel a Trip 60 (Freeze protect) will be generated notifying the user that the system is operating outside the recommended
temperature. This trip can only occuur when Elevator Software State (J03) = 0 (Idle).
316
Electrical
Getting
User Menu A Commissioning
installation
started
Fast stop requested
Time
Advanced
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Maximum
1
Units
Update Rate
Background
Decimal Places
0
Maximum
0
Units
° C
Update Rate
Background
Decimal Places
0
E300 Design Guide
Issue Number: 1

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