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7/50D Plus or 7/50D Controller 

Chapter 4: Operation 

62 

The controls in the upper right-hand corner of the screen enable you to move among the 
Station Operator screens: 

1.  To display the screen for the next lower-numbered station (for example, to move 

from the screen for Station 15 to the screen for Station 14), touch ◄ Back. 

2.  To display the screen for the next higher-numbered station (for example, to move 

from the screen for Station 15 to the screen for Station 16), touch Next ►. 

3.  To display the screen for a specific station, touch Goto. A keypad pops up. Enter the 

number for the desired station. Use 

← to erase any mistakes. Use ↵ to enter the 

value. 

4.  To exit to the Station Summary (or Pump Summary) screen, touch Stations (or 

Pumps). 

Convey time is the length of time the station’s vacuum valve remains open to allow material 
to be drawn in. (For a volume-fill station, the valve closes when material covers the station’s 
volume-fill proximity sensor or this time elapses, whichever comes first.) 

Dump delay is the length of time allowed for material to drain from the station into its 
receiver. During this time, the controller does not attempt to deliver any more material to the 
station. 

The settings for convey time and dump delay should match the times actually required to fill 
and empty the station. The following problems may occur if these settings are incorrect: 

1.  Material is backing up and causing “high vacuum” alarms (for time-fill stations 

only): Convey time is too long. 

2.  System is not keeping up with the demand for material: Convey time is too short, or 

dump delay is too long. 

For your reference, the Station n Operator screen shows the length of time the controller 
actually spent conveying material during the most recent delivery under Last Convey 
Time. 

To adjust a station’s convey time (or the dump delay): 

1.  Go to the Station n Operator screen (as described on p. 61), or go to the Station n 

Setup screen. 

2.  Touch Convey Time (or Dump Delay). 

A keypad pops up. 

3.  Enter the number of seconds desired. Use 

← to erase any mistakes. Use ↵ to enter the 

value. 

The new setting appears under Convey Time (or Dump Delay).