Marathon Computer AACC 2000 - Manual (Page 40)

Marathon Monitors Inc.
AACC 2000 Carbon Nov. 1, 1997
40
Name Description
Pid Pid
PID list
G.SP G.SP
If Gain Scheduling has been enabled (see Chapter 4), this parameter sets
the PV below which ‘
Pid.1’ is active and above which ‘Pid.2’ is active.
SEt SEt
‘
Pid.1’ or ‘Pid.2’ selected
Pb Pb
Proportional Band (
SEt 1)
(in display units)
ti ti
Integral Time in secs(
SEt 1)
td td
Derivative Time in secs (
SEt 1)
rES rES
Manual Reset (%) (
SEt 1)
Hcb Hcb
Cutback High (
SEt 1)
Lcb Lcb
Cutback Low (
SEt 1)
rEL.C rEL.C
Relative Cool Gain (
SEt 1)
Pb2 Pb2
Proportional Band (
SEt 2)
ti2 ti2
Integral Time in secs(
SEt 2)
td2 td2
Derivative Time in secs (
SEt 2)
rES.2 rES.2
Manual Reset (%) (
SEt 2)
Hcb2 Hcb2
Cutback High (
SEt 2)
Lcb2 Lcb2
Cutback Low (
SEt 2)
rEL.2 rEL.2
Relative Cool Gain (
SEt 2)
The following three parameters are used for cascade control. If this facility is not
being used, then they can be ignored.
FF.Pb FF.Pb
SP, or PV, feedforward propband
FF.tr FF.tr
Feedforward trim %
FF.dv FF.dv
PID feedforward limits
±
%
mtr mtr
Motor list - see Table 4-3
tm
Valve travel time in seconds
In.t
Valve inertia time in secs
bAc.t
Valve backlash time in secs
mp.t
Minimum ON time of output pulse
U.br
Valve sensor break strategy