Overtravel And Low Speed Zone - gefran ADV200-HC Instruction Manual

26.08 OVERTRAVEL and LOW SPEED ZONE

This function prevents the trolley, hook, or beam from moving out of permitted zones. The control is
performed with limit switches (settable NC or NO).
You can also use the "Low SpeedZone" function to automatically decelerate when approaching limit switches.
To do this, the drive has to have an encoder (used to measure available stroke) that is correctly connected to
the command drive, and you have to initialize the rope length measurement procedure (see "Initialization
procedure for calculation of rope length" for more information). Otherwise, do not enable the function.
LIMIT SWITCH
Overtravel:
The 2 limit switches must be wired in series (if NC) or in parallel (if NO) and brought to the same digital input.
If a limit switch trips, the control software indicates which one has tripped.
The tripping of a limit switch closes the brake and disables the drive. Until the limit switch returns to rest
position, you can move only in the direction opposite to the tripped limit switch.
Limit switch control is always active and needs no enabling.
Low speed zone:
The "Low Speed Zone" function, if enabled, defines a zone in which speed of movement is forced to the value
set in the "LSZ speed" parameter.
The input in this zone is defined via limit switch software, i.e., by specifying the position in absolute value in
the "Up sw LS abs pos" and "Low sw LS abs pos" parameters.
For the Hoist movement, if a load is attached to the hook and the "Measure Load" parameter is defined
(distance between hook groove and center of gravity of load), the center of gravity of the load will determine
low-speed entry into the area.
Note: If you use –ELS (electric shaft) configuration):
 The tripping of any limit switch in the system will disable all of the drives and close all of the brakes, allowing
all of the drives to move only in the direction away from the tripped limit switch.
 The entrance of any drive into its low speed zone engages speed reduction for the entire system (to prevent
misalignments).
 The speed reference to which the drive goes is the one specified in the "LSZ speed" parameter of the drive
...–ELS-VM.
 Function activation state will be shown on the monitor of the drive involved and on the ...-ELS-VM drive.
ADV200-HC Manual
LOW sw LS pos
LIMIT SWITCH
Low speed zone
UP sw LS pos
Low speed zone
UP sw LS pos
LOW sw LS pos
LIMIT SWITCH
LIMIT SWITCH
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