Safety Pal - GAL GALaxy eHydro Manual

GALaxy eHydro Elevator Controller
Figure 4-2: GALX-1121 Main I/O Board

4.6 Safety PAL

The Safety PAL has a fault LED located in the middle left of the board that indicates there is a PAL
fault. See Figure 4-2.
Important: When the LED is on, the car is prevented from running.
The Safety PAL performs the following functions:
•
Verifies that the Up or Down Fast solenoid turns off when the terminal limits are activated
•
Verifies that the doors are closed and safe to run
•
Verifies all inspection operations
•
Verifies that the car velocity is not greater than 150 fpm in the door zone and with the doors
open or running on inspection.
While the Safety PAL cannot turn on any run control signals, it can turn off the follow signals from the
Main CPU: RUN, SU, SUF, SD, SDF, MC, MC1, STE and from the NTS Processor: UN, UT, DN, and
DT.
When troubleshooting errors detected by the Safety PAL, take the following steps:
Check LED status of the PAL FAULT.
•
Check the NTS CPU and NTS COM are blinking at one second intervals. Check that the NTS
CPU FAULT LED is off.
•
From the Main CPU LCD interface, navigate to the "NTS Inputs and Outputs" menu, and view
all of the I/O status of the NTS CPU. Navigate to the "PAL Inputs and Outputs" menu and view
all of the I/O status of the Safety PAL.
•
From the Main CPU LCD interface, navigate to the "Fault Log" menu, and view the recorded
faults for any fault related to the NTS processor or I/O's that are input to the Safety PAL.
Section 4 - Troubleshooting
4-5