Micromod Micro-DCI: 53SL6000 Single Loop Controller - Manual (Page 86)

Table 7-3. Control Selections
(conF Menu → cn.1, cn.2 Modules)
Prompt Description Dft
rSv
(cn.1
only)
Reverse Valve
Specifies whether 100% output
should be displayed in the output
(yellow) dro as 100% or 0%. This
allows the output dro to be set to
correspond to a preferred valve
representation of output.
Selections:
dir:
100% control output = 100%
displayed.
rEV : 100% control output = 0%
displayed.
dir
MMt
(cn.1
only)
Minimum Manual Jog Time
Designates the mode of manual
operation associated with the VuP
and Vdn logic signals. When MMt =
0, VuP and Vdn are always a pulse
width modulated (PWM)
representation of the control OUT
signal. The PWM period is
determined by the dcP parameter.
When MMt = non-zero, VuP and Vdn
are PWM representations in
automatic operation; however, in
manual operation, they are only
active when either of the output
push buttons is pressed. A non-zero
value entered for MMt represents in
percent the minimum duty cycle
period the logic values VuP and
Vdn will be a 1 whenever the output
push buttons are momentarily
depressed or when a networked
device generates an associated
push button operation.
Non-zero operation:
0.0
OUT
PB
VuP
dcP
Sec.
0 1 2 3 4 25 26 27 28 29 30
dcP = 30 seconds
MMt (MMt = 5% dcP)
Table 7-3. Control Selections
(conF Menu → cn.1, cn.2 Modules)
Prompt Description Dft
dcP
(cn.1
only)
Duty Cycle Period
Specifies in seconds, the length of
the cycle period over which the
digital outputs VuP and Vdn are
calculated. This time must be set
based on the characteristics of the
final control element and the
amount of cycling permitted. For
minimum cycling of the final control
element, the period should be set to
match the end-to-end travel time of
the element. To operate the digital
outputs in a time proportioning
manner, much shorter cycle times
are required. Because each cycle
period is divided into 0.05 second
pieces, the resolution of the output
is determined by the length of the
cycle period. For example: If dcP is
10 seconds, then the period will
contain 200 pieces (10/0.05 = 200),
each being 0.5% of the 10 second
period. If the controller output
(OUT) value is 27.65 (%) at the start
of the period, then the VuP logic will
remain a "1" for 2.8 seconds (27.65%
rounded to the closest 0.5% = 28.1
or 28%; 0.28 x 10 seconds = 2.8
seconds). 2.8 seconds is equivalent
to 56 pieces. The cycle period will
be a "0" for the remainder of the
period, which is 7.2 seconds (144
pieces). 0.0
7.8 Control Scheme Signal
Connector Pin Assignments
Any one of six control strategies can be configured
very quickly from a defaulted controller (ProG-cS-
FiX = 98) by selecting the appropriate control
scheme and setting several parameters. The sig-
nal connector pin assignments vary for these con-
trol strategies as illustrated in Figure 7-21. The six
control strategies are covered as part of the infor-
mation provided in Section 8. The six control
strategies are as follows:
• Single Loop Controller with Remote Setpoint
•
Single Loop Ratio Controller
• Dual Loop Cascade Controller
• Dual Loop High Limited Controller
• Dual Loop Low Limited Controller
• Auto/Manual Station
53SL6000 Instruction Manual Section 7. Control Scheme Block
7-28