GAL GALaxy eHydro - The Safety PAL Functions

GALaxy eHydro Elevator Controller Section 4 - Troubleshooting
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4.5 The Safety PAL Functions
The Safety PAL monitors the Main CPU RUN and Door Zone outputs, the NTS Terminal Limit and Door
Zone outputs, car Inspection and Door Gate/Lock inputs, and the speed outputs from both the Main
CPU and the NTS. The Safety PAL’s job is to interrupt or prevent a run operation in case of an unsafe
conditions.
Run Control - CPU Control outputs gated by Safety PAL:
SU – Solenoid Up Command
MC – Motor Contactor
SD – Solenoid Down Command
MC1 – Dual Motor Contactor
SUF – Solenoid Up Fast Command
STE – Soft-Starter Enable
SDF – Solenoid Down Fast Command
RUN – Run Relay Command
Door Zone Status – CPU Control and NTS MCU Control UL – Up Level
DL – Down Level
DZ – Door Zone
SEL_OK – Communications to Selector OK and no Selector Fault
SPD150 – Speed greater than 150 fpm
SPD75 – Speed greater than 75 fpm
Door Status:
DLT – Door Lock Top
GS – Car Gate Switch or Lock
DLM – Door Lock Middle
RLM – Rear Lock Middle
DLB – Door Lock Bottom
RGS – Rear Gate Switch or Lock
GBP – Gate Bypass
LBP – Lock Bypass
Inspection Status & Control:
GLB – Gate/Lock Bypass
AUTO– Automatic Operation
INS– Car Top Inspection
ICI – In Car Inspection
IU – Car Top Inspection Up
ACC – Access
ID – Car Top Inspection Down
TAU – Top Access Up
MRIN – Motor Room Inspection
TAD – Top Access Down
MRIU – Motor Room Inspection
UP
BAU – Bottom Access Up
BAD – Bottom Access Down
MRID – Motor Room Inspection
Down
Terminal Limit Status – NTS MCU Control outputs gated by Safety PAL:
UN – Up Normal Limit
UT – Up Terminal Slowdown
DN – Down Normal Limit
DT – Down Terminal Slowdown
Figure 4-1 illustrates all the Main CPU, NTS Processor and Safety PAL functions: