20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
Limit Switch Functionality
2
21
Limit Switch Outputs (continued)
Limit Advances
All limit switches have programmable advances that allow you to compensate for fixed or variable delays in
your system. This will allow the device attached to the limit switch output to mechanically activate at the cor-
rect times regardless of the speed of the machine.
The ANS1 uses the calculated
value to determine when the output should fire.
The Global Machine Speed value is updated every 14.6 milliseconds and is filtered by the RPM Filter
value. See page 18 for additional information on the Global Machine Speed value.
Fixed Delays
When compensating for fixed delays, the ANS1 has separate
Lead Advance Time
and
Trail Advance Time
parameters, which allows you to compensate for mechanical devices whose activation time is different from
their release time.
If the Trail Advance Time is greater than the Lead Advance Time, then it is possible for the Trailing
Setpoint to be advanced to a point where it occurs before the Leading Setpoint. If this occurs, the output
will be forced off and will not fire.
The Lead Advance Time and Trail Advance Time are both programmed in milliseconds and have a
range of 0 to 32,767.
Figure 2.5 shows the effects of a ten millisecond Lead Advance Time on a limit switch output at 100 and 150
RPM.
Figure 2.5 Fixed Advance Example
Some competitor PLS products specify advances in degrees per 100 RPM. When switching to the ANS1
from one of these controllers, use the following formula to convert the value to milliseconds:
Without Advance
With Advance
10 mS = 6°
10 mS = 9°
10 mS = 6°
10 mS = 9°
Limit
Switch
Setpoint
Limit
Switch
Setpoint
Output at
100 RPM
Mechanical
Actuation at
100 RPM
Output at
100 RPM
Mechanical
Actuation at
100 RPM
Output at
150 RPM
Mechanical
Actuation at
150 RPM
Output at
150 RPM
Output at
150 RPM
Advance in milliseconds
{Value in degrees per 100 RPM}
600
-------------------------------------------------------------------------------
1000
=
Содержание ANS1 ANYNET-I/O
Страница 1: ...MICRO CONTROLS INC ADVANCED U s e r M anual Manual 940 0A090...
Страница 6: ...Table of Contents ADVANCED MICRO CONTROLS INC 6 Notes...
Страница 26: ...Limit Switch Functionality ADVANCED MICRO CONTROLS INC 2 26 Notes...
Страница 36: ...Additional Functionality ADVANCED MICRO CONTROLS INC 3 36 Notes...
Страница 90: ...LEADERS IN ADVANCED CONTROL PRODUCTS ADVANCED MICRO CONTROLS INC...