How far can you push the envelope? The envelope management system (EMS) on the Snorkel TB100J, TB120, TB125J and TB126J telescopic boom lifts helps to keep operators safely within the working envelope.
The EMS controls the boom position, elevation and extension for each boom angle and extension. Before operating, the system reads inputs from the machine’s built-in sensors, controllers and limit switches in order to detect potential issues with a sensor.
When the operator initiates a request to either lift, lower, extend or retract the boom, the EMS compares that request with the boom’s current position with respect to the working envelope. If the requested motion would not cause the platform to go beyond the working envelope, the EMS would then send a signal to the proportional valve to move the boom in the requested direction.
EMS indicator lights in green, white and red are located above the upper and lower control panels. Each color indicates whether or not the machine is ready to operate and/or within the working envelope.
Initializing
When the machine is first started or after the EMS has been reset, the EMS will enter “Initializing Mode.” There will be a 7-10 second delay before boom functions become operational. During this time, the EMS reads inputs from the machine.
If all inputs fall within each of its set parameters, the machine will enter “System Normal” mode to indicate it is ready for operation. If any of the inputs fall outside of its set parameters, the machine will enter either “Alert Mode” (green light) or “Error Mode” (red light), depending on the input that may be out of range.
Green Light
Solid green light – Ready to operate
Flashing green light – Calibration needed
A flashing green light and 3 beeps after 5 minutes indicates “Alert Mode.” This indicates that the machine needs calibration. Contact Snorkel Product Support for assistance.
White Light
Flashing white light – Nearing working envelope
When the platform nears the working envelope, the white light will begin to flash, and the speed function will slow down. One or more functions may be restricted to keep the platform within the working envelope.
Solid white light – Edge of working envelope reached
If movement continues in the same direction and reaches the edge of the working envelope, the white light will turn solid, and the boom function will be stopped.
Red Light
The red EMS light/button indicates an “Error Mode,” typically resulting in restricted functions. It is also a reset button in case of a malfunction with the EMS system.
Flashing red light – Primary envelope exceeded
If the red light begins to flash and beeps in quick pluses, this indicates that the primary envelope been exceed.
Continuous flashing red light – Primary & backup envelopes exceeded
If the red light emits a continuous series of beeps and flashes, both the primary and backup envelopes have been exceeded.
Solid red light – Backup envelope exceeded
This indicates that the machine is experiencing a system or electrical failure, or that a farther extension beyond the backup envelope has been reached. Should the solid red light continue to illuminate after resetting the EMS system, contact Snorkel Product Support for assistance.
For operator’s manuals and the EMS Calibration and Troubleshooting Guide, visit The Platform.
