Set Dump Delay, Station Settings Menu
The second submenu in Station Settings is the Set Dump Delay submenu.
SET DUMP DELAY?
NO/YES
To set dump delay time:
•Press the YES key.
After a hopper finishes loading, the next hopper in the queue usually gets loaded. The time it takes to load the new hopper(s) usually gives ample time for the first hopper to dump its material. However, in a situation where a single hopper is being loaded, a demand may be generated during the dump cycle from material catching on the flapper switch. This may cause an inadvertent load while the hopper is still dumping material.
To prevent this from occurring, a dump delay timer starts after each hopper loads. The controller then waits until the timer elapses before loading the station. Setting this timer is critical to an efficiently operating conveying system. If you set the timer too short, inadvertent loads result. If you set the timer too long, unneccessary sequence delays occur.
To determine the proper setting, fill the hopper with material and measure the time it takes to dump the material. Add one second (1 sec.) for smaller hoppers and three seconds (3 sec.) for larger hoppers to this time. Enter the setting into controller memory using the following procedure. You may have to adjust the time setting for the best overall system efficiency.
TO SELECT A STATION
PRESS STATION <1-12>
To alter station dump delay time:
•Select the station requiring the dump delay time change, and press the related Station STnn key. nn is the number of the station you want to alter.
The following screen displays.
DUMP DELAY 11: 15.0s
PRESS ENTER TO SAVE
| Chapter 3: Installation | 21 |