JUMO iTRON B 70.2040, Operating Instructions Manual

Page: 19 / 41

5 F
unctions
19
5.3 Controller
Controller structure
The controller structure is defined via the parameters
Pb
,
dt
and
rt
.
Example: Setting for PI controller
→
Pb .1 =120, dt =0sec, rt =350sec
Symbol Notes
C113 Controller type and assignment of the controller outputs to the physical
outputs 1+2
v
page 32
C116 Outputs in fault condition
v
page 33
The switching states of the outputs are defined here in the event of over/underrange, probe
break/short circuit or display overflow.
v
Chapter 7
C118 Assignment of the outputs
v
page 33
Only for Type 702042/43/44; overwrites the assignment of C113 (controller type as C113 )
Pb:1 Proportional band 1 (controller output 1)
v
page 36
Proportional band 2 (controller output 2)
Influences the P action of the controller. If
Pb
=0, the controller structure is not effective.
Pb:2
dt
Derivative time
v
page 36
Influences the D action of the controller. If
dt
=0, the controller has no D action.
rt Reset time
v
page 36
Influences the I action of the controller. If
rt
=0, the controller has no I action.
Cy 1 Cycle time 1 (controller output 1)
v
page 36
Cycle time 2 (controller output 2)
The cycle time has to be selected so that the energy supply to the process is virtually
continuous, while not subjecting the switching elements to excessive wear.
Cy 2
b70.2040en.bk Seite 19 Mittwoch, 19. November 2008 10:15 10