The Computer
5-34 Manual # 42-02-1P28 A3
DRDY
DRDY is a signal from the drive that it is ready to operate. Drive Ready (input to controller)
@ System IO > System Inputs
DRE
The drive tells the controller that it has control of the motor so it is safe to move the car.
Drive Enable (output from controller) @ System IO > System Outputs
DRO
DRO tells the controller that it is outputting current to the motor. Car should be moving.
Drive On (input to controller) @ System IO > System Inputs
DSL
As a backup to the normal slow down means, the slow down limit switches remove power
from the high speed circuits to slow down car. Down Slow Limit @ System IO > System
Inputs, see flags DSL1/DSL2
DTL
Normally assigned as the Down Normal Terminal Limit that prevents the car from going on
to the final limit switch. Down Terminal Limit @ System IO > System Inputs
DZ
The DZ/DZF/DZR signal that we are within 3” of floor level. Doors will not open unless this
signal is active. Door Zone @ CAR DIAG > CAR Flags and SYSTEM DIAG > Landing System
and MOTION DIAG > Flags
EQ
Earthquake. A ring and string or seismic switch (or both) will be used to activate earth-
quake operation. Earthquake view @ SYSTEM I/O > PROGRAMMED INPUTS, EQ SS or EQ
CWT
EQR
Earthquake operation is a latching function that requires a manual reset which this switch
provides. @ MOTION DIAG > MOTION Inputs, see EQR.B
ESC
Fed by Firefighters Stop Switch. Car top stop switch emergency exit contact and SOS switch.
Emergency Stop Car @ System IO > System Inputs
ESCTO.B Emergency Switch Cutout enable, Safety Processor B @ MOTION DIAG > MOTION Outputs
ETH Ethernet
FB
Fed by fault bypass jumper on HC-MPU-2-TS. Fault Bypass @ MOTION DIAG > MOTION
Inputs, see FBYP.P Flag
FLO Fan Light Output @ CAR DIAG > CAR Flags also in CONFIG 01 > System Timers
FLT Bypass
Bypass input on HC-MPU-2-TS board, view @ PDL DIAG > PLD INPUTS, FLT BYP JPR and also
@ SYST 1/O, System Inputs, FLT BYP
FLPWR Car fan and light power control @ MOTION DIAG > MOTION Outputs, FLPWR.B
FR Fault Reset @ PLD DIAG > PLD Inputs, FLT RST BTN
FR HAT Fire service light enable output @ System IO > Programmed Outputs
FR1 BUZZER Fire service buzzer enable output @ System IO > Programmed Outputs
FR1 LIGHT Fire service light, lobby, enable @ System IO > Programmed Outputs
FR1 OFF Fire recall switch off input @ System IO > Programmed Inputs
FR1 ON Fire recall switch on input @ System IO > Programmed Inputs
FR1 RESET Fire Recall reset input @ System IO > Programmed Inputs
FR2 CANCL In-Car Fire Service Car Call Cancel @ SYSTEM IO > PROGRAMMED INPUTS, FR2 Cancel
FR2 HOLD In-Car Fire Switch Hold System IO > PROGRAMMED Inputs, FR2 Hold
FR2 OFF In-Car Fire Switch OFF @ System IO > PROGRAMMED Inputs, FR2 OFF
FR2 ON In-Car Fire Switch ON @ System IO > PROGRAMMED Inputs, FR2 ON
FRA Fire Recall Alternate @ System IO > Programmed Inputs
FRS Fire Recall Main @ System IO > Programmed Inputs
FRSA Fire Recall Switch, this car Alternate @ System IO > Programmed Inputs
GOV Governor input that opens if car over speeds. Drops safety string and activates rope gripper.
GP General Purpose. Cycle Test I/O if used
GS PLD gate switch monitor @ PLD DIAG > PLD Inputs
HAPS Hydraulic Auxiliary Power Supply (MCE APS product for hydraulic elevators)
Table 5.5 Acronym Descriptions and Memory Locations
Acronym Description and Memory Location
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