CONTREX MLP-Drive - Manual (Page 29)

2 - 13
11
13
J5
SCROLL UP
Figure 2-15 Scroll Down
12
13
J5
SCROLL DOWN
The Scroll Down input decrements the active setpoint. The active setpoint will be
decremented whether or not it is being currently displayed. There are two methods to
decrement the active setpoint using the Scroll Down input. Each closure of the input
decrements the active setpoint one engineering unit. Also, If the Scroll Down input is
maintained closed, the active setpoint will be decremented one engineering unit every
half second.
The Open/Closed Loop input determines the basic manner in which the control
algorithm operates. In the Closed Loop position (J5 pin 12 open), the control algorithm
adjusts the drive output to reduce the error to zero (setpoint minus feedback). In the
Open Loop position (J5 pin 12 shorted to pin 13), the drive output is adjusted in
response to the setpoint changes only and feedback and error are ignored.
Scroll Up (J5 pins 11, 13)
The Scroll Up input increments the
active setpoint. The active setpoint
will be incremented whether or not it
is being currently displayed. There
are two methods to increment the
active setpoint using the Scroll Up
input. Each closure of the input
increments the active setpoint one
engineering unit. Also, if the Scroll Up
input is maintained closed, the active
setpoint will be incremented one
engineering unit every half second.
Scroll Down or Open/Closed
Loop
(J5 pins 12, 13)
The function of this input is
determined by CP-60. If CP-60 is set
to "1", this input functions as the
Scroll Down input. If CP-60 is set to
"2", this input functions as the Open/
Closed Loop input.
Figure 2-14 Scroll Up