Micromod Micro-DCI: 53SL6000 Single Loop Controller - Manual (Page 84)

Table 7-3. Control Selections
(conF Menu → cn.1, cn.2 Modules)
Prompt Description Dft
tr Reset Time (see Section 9.3)
Specifies the time in minutes
required for additional corrective
response equivalent to the
proportional response (integral
action). For a detailed discussion
on control and tuning, see Section
9. Values should be limited
between 0.02 and 200 minutes
/repeat. A value of 0.0 turns
integral action off. 0.0
td Derivative Time (see Section 9.4)
Specifies the time in minutes that
control response is advanced over
proportional only action. For a
detailed discussion on control and
tuning, see Section 9. Values
should be limited between 0.01 to 8
minutes. A value of 0.0 turns
derivative action off.
0.0
Mr Manual Reset
This value determines the position of
the output element (e.g., valve)
when the controller is in automatic
mode and the error is zero. It is only
in effect when tr is zero. 50.00
oh Output High Limit
Specifies in percent the maximum
allowable control output during
automatic operation. This limit also
affects outputs during manual
operations when hard manual limits
are turned on. 100.0
oL Output Low Limit
Specifies in percent the minimum
allowable control output during
automatic operation. This limit also
affects outputs during manual
operations when hard manual limits
are turned on. 0.0
oSr Output Slew Rate
Specifies in percent per second the
maximum allowable rate of control
output change during automatic
operation. A value of 0.0 indicates
that the control output rate of
change is not limited. Slew values
less than 2.0 may experience
decreased timing accuracy. 0.0
hML Hard Manual Limits
Specifies whether the output
high/low limits affect the output
during manual operations.
Selections:
oFF
: control output is not limited
during manual operations.
on: control output is limited
between output high limit
and output low limit during
manual operations.
on
Table 7-3. Control Selections
(conF Menu → cn.1, cn.2 Modules)
Prompt Description Dft
MFd Manual Fallback Disable
Selections are as follows:
on:
On allows the controller auto/
manual selector to remain un-
changed if power is removed.
oFF:
If oFF, the controller always
powers up with the selector in
the manual position.
oFF
ir
iLr
Instrument Range,
Instrument Lower Range
These values, given in engineering
units, define the vertical bar displays
end points and establish the width
of the proportional control band.
This allows the control range to be
set independent of the process
variable range.
%PV = 100



(PV − iLr)
ir



%SP = 100



(SP − iLr)
ir



(For the in.Ld control scheme, the ir
and iLr values scale the PV1 bar.)
100.0
0.0
Sh Setpoint High Limit
Specifies the maximum allowable
control setpoint in engineering units.
It is applied to all setpoint sources;
therefore, affecting remote set-
point, local setpoint, and tracking
(safety) setpoint.
(For the in.Ld control scheme, the Sh
value is the instrument range - ir, for
the PV2 bar.) (See ir/iLr above.) 100.0
SL Setpoint Low Limit
Specifies the minimum allowable
control setpoint in engineering units.
It is applied to all setpoint sources;
therefore, affecting remote
setpoint, local setpoint, and
tracking (safety) setpoint.
(For the in.Ld control scheme, the SL
value is the instrument lower range -
iLr, for the PV2 bar.) (See ir/iLr
above.) 0.0
53SL6000 Instruction Manual Section 7. Control Scheme Block
7-26