Eaton ELC-PB, Programming Manual

Page: 434 / 728

3 . I n s t r u c t i o n S e t
M N050 03003E F or mo re infor ma tio n vi sit:
w w w. e a t o n . c o m
3-265
Example program of SV ramp up function:
M1002
MOV K10 D3
M10
M0
TMR T0 D3
T0
RST
T0
MOV K50 D2
D1 D0 >
MOV
K-50
D2
D1 D0 <
MOV K0 D2
D1 D0 =
ADD D2 D1 D1
CMP D2 K0 M10
D0 D1
<
MOV D0 D1
M12
D0 D1
>
MOV D0
D1
M0
PID D1 D1116 D10 D5
Application 2:
Speed control systems and pressure control systems operate separately (use the diagram of
Example 2)
Control purpose:
After the speed control operates in open loop for a period of time, add a pressure control
system (PID instruction) to perform a close loop control.
Control properties:
Since the speed and pressure control systems are not interrelated, we have to structure an
open loop for speed control first followed by a close loop pressure control. If there is concern
that the pressure control system changes excessively, consider adding the SC ramp-up
function illustrated in
Application 1
into this control. See the control diagram below.