Emerson E300 Series Design Manual page 320

Safety Product Mechanical
information information installation
H37 Reset Energy Meter
Mode Open-Loop, RFC-A, RFC-S
Minimum 0
Default 0
Type 1 Bit Volatile
Display Format Standard
Coding RW
Energy Meter: MW h (J84) and Energy Meter: kW h (J85) accumulate the energy transferred through the drive. If Reset Energy Meter (H37) = 1 then
Energy Meter: MW h (J84) and Energy Meter: kW h (J85) are held at zero. If Reset Energy Meter (H37) = 0 then the energy meter is enabled and will
accumulate the energy flow. If the maximum or minimum of Energy Meter: MW h (J84) is reached the parameter does not rollover and is instead
clamped at the maximum or minimum value. For Open-loop, RFC-A and RFC-S modes a positive energy flow indicates that power is flowing out of
the a.c. motor terminals. For Regen mode a positive energy flow indicates that power is flowing from the supply to the AC drive terminals.
H38 Blocked Elevator Release Enable Input
Mode Open-Loop, RFC-A, RFC-S
Minimum 0
Default 0
Type 1 Bit User Save
Display Format Standard
Coding RW
When set to On (1) the blocked elevator release function is enabled.
The mechanical lock on an elevator car will operate independent of the drive during an over speed condition so the elevator car is safely stopped in a
locked position. This elevator releasing feature will attempt to release the blocked elevator. The blocked elevator releasing function is enabled using
a digital input to the drive routed to Blocked Elevator Release Enable Input (H38). Once enabled the elevator car locked condition is identified by
using Current Limit Reached (L15) and At Zero Speed (L08) where if both = On (1) the elevator car is blocked, and if either = Off (0) the elevator car
is released.
The blocked elevator releasing function can be used to release the elevator car when trapped after the elevator car mechanical brakes have been
used.
If the elevator car is not released immediately (within 150 ms) the drive will move the elevator car up and down by short distances (switch direction
commands repeatedly) as long as a speed is selected (as part of the elevator controller inspection mode). A 150 ms commanded direction to 50 ms
opposite direction ratio is applied to release the elevator car. When the elevator car is released it will travel at the creep speed defined by Creep
Speed Select (G52). During elevator car release the drive will run the motor with regardless of the selected speed.
When the speed and direction signals have been removed, ending the elevator car release, Blocked Elevator Release Enable Input (H38) must be
set to Off (0). If the blocked elevator releasing function is to be implemented again Blocked Elevator Release Enable Input (H38) must be set to On (1)
again.
To allow maximum torque to be generated, and provide the best performance for the blocked elevator releasing, the following parameter settings are
used:
Parameter
At Zero Speed (L08)
Current Limit Reached (L15)
V1 Creep Speed Reference (G01)
Maximum Speed Error Threshold (H15)
Maximum Distance Error Threshold (H16)
320
Electrical Getting
User Menu A Commissioning
installation started
Used to detect if the elevator car has been released
Used to detect if the elevator car has been released
Used to set the maximum speed
Set to 0 internally during blocked elevator release preventing a trip.
Set to 0 internally during blocked elevator release preventing a trip.
Advanced
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Maximum 1
Units
Update Rate Background read
Decimal Places 0
Maximum 1
Units
Update Rate Background
Decimal Places 0
Description
E300 Design Guide
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