Thermcraft XST-2-0-12-1V1-E28, Instruction Manual

Page: 195 / 260

Installation and Operation Handbook Operation
Name Description
Alarm list
1 - - -
Alarm 1 setpoint value
2 - - -
Alarm 2 setpoint value
3 - - -
Alarm 3 setpoint value
4 - - -
Alarm 4 setpoint value
In place of dashes, the last three characters indicate the
alarm type as follows:
Note: It is possible to indicate only up to four alarm
conditions (known as soft alarms). They can be “wired” to
operate relays within the limitations of the number of output
modules available. For more information see Configuration -
Chapter 6.
-FSL
PV Full scale low alarm
-FSH
PV Full scale high alarm
-dEv
PV Deviation band alarm
-dHi
PV Deviation high alarm
-dLo
PV Deviation low alarm
-LCr
Load Current low alarm
-HCr
Load Current high alarm
-FL2
Not available in 2416
-FH2
Not available in 2416
-LOP
Working Output low alarm
-HOP
Working Output high alarm
-LSP
Working Setpoint low alarm
-HSP
Working Setpoint high alarm
4rAt
Rate of change alarm ( AL 4 only )
HY 1
Alarm 1 Hysteresis (display units)
HY 2
Alarm 2 Hysteresis (display units)
HY 3
Alarm 3 Hysteresis (display units)
HY 4
Alarm 4 Hysteresis (display units)
Lb t
Loop Break Time in min utes
diAG
Enable Diagnostic alarms ‘
no
’ / ‘
YES
’
Atun
Autotune list
tunE
One-shot autotune enable
drA
Adaptive tune enable
drA.t
Adaptive tune trigger level in display units.
Range = 1 to 9999
Adc
Automatic Droop Compensation (PD control only)
Name Description
Pid
PID list
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
‘
Pid.1
’ or ‘
Pid.2
’ selected
Pb
Proportional Band (
SEt 1
)
(in display units)
ti
Integral Time in secs (
SEt 1
)
td
Derivative Time in secs (
SEt 1
)
rES
Manual Reset (%) (
SEt 1
)
Hcb
Cutback High (
SEt 1
)
Lcb
Cutback Low (
SEt 1
)
rEL.C
Relative Cool Gain (
SEt 1
)
Pb2
Proportional Band (
SEt 2
)
ti2
Integral Time in secs (
SEt 2
)
td2
Derivative Time in secs (
SEt 2
)
rES.2
Manual Reset (%) (
SEt 2
)
Hcb2
Cutback High (
SEt 2
)
Lcb2
Cutback Low (
SEt 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
SP, or PV, feedforward propband
FF.tr
Feedforward trim %
FF.dv
PID feedforward limits
±
%
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
Not available in 2416
HA025041 issue 12 Aug 14 2-11