Micromod Micro-DCI: 53SL5100B Single Loop Controller - Manual (Page 82)

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
11.3 EASY-TUNE Parameters
All pertinent input parameters to the EASY-TUNE algorithm are obtained from Controller Module Mode 0,
which must first be configured. The parameters that must be configured before initiating the EASY-TUNE
sequence (B008 = 1) are items 1, 3, 5 through 10, in Table 11-1.
Table 11-1. EASY-TUNE Parameters
Item Datapoints Description Default
1
L520
C385
C386
C387
C388
C389
C390
Enable Tuning Parameter Limits
0 - no limits checked, 1 - limits below apply
lowest % PB
highest % PB
lowest T
R
(minutes)
highest T
R
(minutes)
lowest T
D
(minutes)
highest TD (minutes)
1
2
500
0
30
0
10
2 L521 Abort EASY-TUNE Switch 0 - no effect, 1 - EASY-TUNE is aborted 0
3
L522 Automatic Tuning Parameter 1 - upon successful completion of the
EASY-TUNE sequence, new tuning parameters will be entered. 0 - new
tuning parameters will not be entered but available for review. 0
4 B008 Enable EASY-TUNE 0
5 B385 Control Module Selector (leave at 0) 0
6 B386 PID Control Mode 1 - P, 2 - PI, 3 - PID, 4 - PD, 5 -I 0
7
C378 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.) 2
8
C379 Limiting Settling Time (seconds) Set to maximum time allowed during
B387 = 1 or 2. (See Table 11-2 and Figure 11-1.) 0
9
C380 Maximum Allowable Excursion of PV in EASY-TUNE (%) Setting C380
will prevent excessive change in PV. 0
10
C381 Step Size Change in Controller Output (± %) Set large enough to cause
significant but allowable PV changes. (See C378 above.) 0
11
C382
C383
C384
Modifiers to Tuning Criteria (see Section 11.5.)
T
P
Time Constant modifier
K
P
Process Gain modifier
W
P
Dead-Time modifier
12
C391
C392
C393
C394
C395
C396
EASY-TUNE Results (display only):
T
P
Time Constant (seconds)
K
P
Process Gain
W
P
Dead-Time (seconds)
% PB
T
R
(minutes)
T
D
(minutes)
0
0
0
0
0
0
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