Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual - Manual (Page 182)

Table 5-14. System Module
Title Definition Atom Data-
point
De-
fault
Number of
Groups
This parameter dictates the number of groups that the display list represents. In the pop-up
locator grid, this parameter represents the number of columns in the matrix. Valid numbers are
from 1 to 8. When B017 contains a 1, F1 is the page forward push button and F2 is the page
backward push button. When B017 contains a number greater than 1, F1 is the next group push
button and F2 is the next display push button.
An example would be a two loop controller (CON0 and CON1) where it is desirable to have
three display groups (three display grid columns): datapoint B017 would be configured to 3.
MDG B017 1
Number of
Displays
Per Group
This parameter is the number of displays contained within each group. Each group must have
the same number of displays. In the pop-up locator grid, this parameter represents the number
of rows in the matrix. Valid numbers are from 1 to 8.
An example would be a two loop controller (CON0 and CON1) where it is desirable to have
three display groups, each containing three displays (three display grid columns and three
display grid rows): datapoint B017 above = 3 and datapoint B018 would also be configured to 3.
MDS B018 5
Loop Select Control Module Selector (CON-0 = 0, CON-1 = 1, CON-2 = 2, CON-3 = 3) LPS B385 0
Control
Mode
PID Control Mode
1 - P, 2 - PI, 3 - PID, 4 - PD
If the ratio of Process Dead Time (Wp) and Process Time Constant (Tp) is greater than 0.5, then
this datapoint should be set to 3 for PID Control Mode.
CM B386 0
Limit Settling
Time This parameter corresponds to the time, in seconds, allowed for the process to settle and for the
preliminary step-response to be detected.
TLIM C387 0
PV
Excursion
Limit
Maximum Allowable Excursion of PV in EASY-TUNE (%)
Setting C380 will prevent excessive change in PV.
DPV C380 0
Output Step
Step Size Change in Controller Output (
±
%)
Set large enough to cause significant but allowable PV changes. (See C378 above.)
DOUT C381 0
Preliminary
PV Step
Disturbance
Excursion Limit for Preliminary Step Disturbance (%)
The step size chosen for C381 will cause a PV change which depends on the process gain as
well as C381 itself. C378 should be set to approximately 1/4 of that expected change. (See
C381 below.)
DPPV C378 2
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