Table of Contents
Advertisement
8.3
Limit Switch Distances
After the board is installed and wired, it may be desirable to relocate the existing limit switches in
the hoistway. Leaving the switches in their present position may cause the Limit board to limit
the car's maximum speed if power is removed or if the board is reset at a position away from a
terminal floor. This will occur because the Limit board has lost its position, and it has determined
that the maximum safe speed at which the car can operate is less than contract speed. The
maximum safe speed is the speed at which the Limit board can safely slow and stop the car
based on the setting of the slowdown switches and the maximum measured deceleration rate.
Relocating the switches is not mandatory, but may be desired for optimum operation of
the board.
To determine the distance which the limit switches should be set to it is first necessary to
determine the maximum deceleration rate of the car. To do this, access the "Motion Parameters"
Menu. Check the "Acceleration Rate" parameter. The largest value saved here will be the
maximum deceleration rate. Typically, this will be between 2.0 ft/s
following tables, find the table that has a deceleration rate equal to or greater than the largest
programmed acceleration rate value. For speeds not divisible by 100 (i.e.: 350 FPM), use the
distance values from the next greater speed.
Car Speed
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
Revision AA2.2
Microflite Ultra 2000
Table 1 - Acceleration Rate [ 3.0 ft/s
1SU / 1SD
2SU / 2SD
31'
38' 6"
46' 6"
55' 6"
65'
76'
87'
99' 6"
Printed 03 - 15 - 03
2
3SU / 3SD
5' 6"
13' 6"
18' 6"
24'
22'
28'
33'
39'
45'
53'
59'
67'
2
and 4.0 ft/s
. Referring to the
2
4SU / 4SD
3'
1' 6"
3'
9'
3'
3'
12'
3'
16'
3'
15'
3'
17'
3'
20'
3'
23'
3'
26'
3'
30'
3'
33'
3'
37'
3'
8- 2
- Quick Links:
- A2 Controller Event Descriptions
Hide quick links:
Advertisement
Table of Contents
