SET POINT
Modify Set Point
Procedure to recall a Set point from memory
CHANGING NUMERIC VALUES
TUNING
AUTO-TUNE
7 • OPERATING INSTRUCTIONS • SX75 SERIES CONTROLLERS
AUTOMATIC / MANUAL OPERATION
Local Remote
FUNCTIONS MENU
During normal operation
0 2 5 0
0
9
From normal operation (Auto mode)
From normal operation (Auto mode)
During normal operation
During normal operation
From normal operation (Manual mode)
Variable
X
Output
Y1
Auto-Tune in operation
Ymax: 100% or
yh
Ymin: 0%
Set point change or start up
Start Auto - Tune Process
Fuzzy parameters
have been calculated
Set point W
Dev. > 5% span
To scroll through , press
Normal Operation
F
To activate displayed set point press
Confirm modified
Set point
Note:
If a Remote Set point is selected, the instrument
will store the Local Set point value this will be
re-instated Local Set point mode is selected.
Note:
After the Set point has been modified the new target Set point will be reached after a period
of time, depending upon the values entered in the
sl.u
(Slope up) and
sl.d
(Slope down)
gradient parameters.
When using Remote Set point we suggest, to set
sl.u
and/or
sl.d
to 0
The target Set point can be viewed at any time from the function menu.
Target Set point
If slope gradient is equal to zero there will be a step change
Set point changed
Target Set point =350
°
t
t = 10 minutes
sI.u
.
=
10 digit / min.
Example
Initial Set point
= 250
°
C
Set point value
will flash
Least significant
digit will flash
The Set point may
now be modified
as previously
explained
It is possible to modify any numeric value by changing each digit in
press to select the required digit.
Each successive press of this button moves the
flashing digit one place to the left.
Example: to change 250 to 260
Pressing increments
the
selected
digit
(for
the
most significant digit there is a - between 9 and 0)
Press to accept the value. The value displayed
will be accepted automatically after the 10 seconds.
Auto-tune should be used when the instrument is first installed to provide approximate
values for the FUZZY algorithm, and calculation of proportional, integral and derivative
parameters.
When the auto-tune cycle has been completed, the values for FUZZY (
ferr
;
fder
;
t.san
) will
also be adjusted automatically.
It is possible to escape from the auto-tune procedure at any time by pressing any key.
The Auto-tune function is available if the following requirements are met:
1. Parameter
A.tu
= 1
2. The deviation between set point value and measured value
of more than 5% of input span
Note• if the heat/cool facility is selected the
Auto-tune process will calculate the FUZZY
parameters for both heat and cool.
Auto-Tune in operation
Start
Auto-tune
process
To enter Manual mode
To enter Automatic mode
Enable remote Set point
The REM indicator will,
switch on
Enable local
Set point
The REM indicator
will switch off
Set point value
will flash
Modify Set point
Accept Set point 1 as
target Set point
Accept Set point 2 as
target Set point
Accept Set point 3 as
target Set point
Accept Set point 4 as
target Set point
Set point value will
flash
Modify Set point
AUTO
AUTO
100% Set point W
W = X
Y
AUTO
=Y
MAN
Y
MAN
=Y
AUTO
modify Y
with
100% output Y
W (X)
W
Y
Y
Y
0
0
MAN
X
sI.u.
Remote Set
point status
Serial
Communication
status
Auto-Tune
status
Memory Set
point Number
window
Auto/manual
status
If or is
not
pressed
within
10
seconds
the
instrument
will time-out back to the normal display
Time out:
1
during
normal operation
during
programming
DISPLAY
Measured value
Set point
Function
mnemonic
during normal
operation
KEYS
Digit select
Increment value
Edit Set point
Enter
Auto / Manual
Function
Function value
during
programming
Note:
The above Set points may be modified from the
1
st
group within the parameter menu.
AT and MAN
will be
displayed
when auto-
tune is in
operation.
3
4
Run Auto - Tune
function
Modify or view
Parameters
Start Configuration
Procedure
View
Set point
View
Configuration code
View instrument
Device number 0 … 63
For serial comms
SX75+ model only
Serial Communication status
enabled to write
63
275.8
275.8
50
4
tune
par.
Conf
Addr
Addr
Co
7500
4230
0250
0250
0260
250
0250
0260
sp. 2
sp. 1
250
sp. 4
sp. 3
250
s.p.r.
s.p.1.
sp. t
Aan.
Auto
tune
275.8
275.8
50
63
NOTE:
THIS PROCEDURE WILL NOT WORK
IF TERMINALS 21 & 24 (IL3) ARE LINKED
COMMISSIONING EXAMPLES
The following commissioning examples for the SX75 controller will provide guidance to commission similar applications.
Example 1. Pressure control
Using an SX75 controller with a pressure transmitter monitoring system pressure, and the controller is providing a 4-20mA control signal to
the control valve.
Application requirements:
•
Pressure transmitter 0 to 25 barg, producing a 4 - 20 mA output signal.
•
Control Valve with Electric or Electro-pneumatic positioner accepting a 4 - 20 mA input signal.
•
Two Event alarms are required. Event Y2 set for active high process alarm at 22 bar. Event Y3 set for active outside band alarm set
at 5 bar.
•
This process requires only one set point. The local set point is 18 bar
Configuration code settings:
E
F
G
H
7
4
3
0
I
L
M
N
5
3
0
0
Configuration parameter settings:
Parameter
Description
Customer set
Values
Sc.d.d
Number of decimal places
1
Sc.lo
Input scale low value
0.0
Sc.hi
Input scale high value
25.0
Group1 Set point parameter settings:
Parameter
Description
Default
Customer set
Value
Values
Sl.
U
Slope up between SP
0.0
0.0
Sl. d
Slope down between SP
0.0
0.0
y2S.P
Event Alarm 1set point
300
22.0
y2Hy
Event Alarm 1 Hysteresis
0.50
0.5
y3S.P
Event Alarm 2set point
300
5.0
y3Hy
Event Alarm 2 Hysteresis
0.50
0.5
Group 2 Control parameter settings:
Parameter
Description
Default
Customer set
Value
Values
P.b.
Proportional Band
5.0
20.0
t.i.
Integral time
1.0
0.3
t.d.
Derivative time
0.20
0.0
F.Int.
Fuzzy intensity
50
50
Group 3 Advanced parameter settings:
Parameter
Description
Default
Customer set
Value
Values
A.Par
Security access
0022
0022
A.tu.
Auto Tune enable
1
0
F.Err
Fuzzy scale
20.0
80
F.der
Fuzzy change on difference
10.00
99.99
t.San
Sampling time
3
0
S.P.L.l
Set point low limit
see Sc.lo
0
S.P.L.h
Set point high limit
see Sc.hi
20
yL.
Minimum power output
0
0
yh.
Maximum power output (heat)
100
100
t.F iL
Input filter time constant
0
0
In.Sh
Input Shift
0
0
Sa.y2
Y2 Event safety Action
0
1
Sa.y3
Y3 Event safety action
0
1
In the normal operating mode, adjust the local set point to 18 bar. Press
W
key, then press the
key. Using the increment key
, and the digit select key
change the set point to 18.
Note: For SX75+ models,
the parameters “ S.C.I;
Addr; S.C.b.r; S.C.Pa” for
serial communication will
be present between t.San
and S.P.L.l .
Example 2. Temperature control
Using an SX75 controller with an RTD Pt100 sensor monitoring the system temperature. The controller provides a Valve Motor Drive
output signal to the electric actuator. The actuator travel speed is 0.5mm/s, with a valve travel of 20mm.
Configuration Code and parameters:
•
Temperature sensor with an effective range from 0°C to 100°C.
•
Control Valve with Valve motor drive electric actuator.
•
Two Event alarms are required. Event Y2 set for active low process alarm set at 35°C. Event Y3 set for an active high deviation alarm
set at 10°C.
•
This process requires only two set points. Set point 1 = 40°C is the standby temperature. Set point 2 = 60°C is the control
temperature. (Note Set point’s 3 and 4 can be ignored)
Configuration code settings:
E
F
G
H
1
0
5
0
I
L
M
N
6
7
0
3
Configuration parameter settings:
Parameter
Description
Customer set
Values
C_F
°C or °F
0
Group1 Set point parameter settings:
Parameter
Description
Default
Customer set
Value
Values
S.P. 1
Set point 1
10
40
S.P. 2
Set point 2
20
60
S.P. 3
Set point 3
30
N/A
S.P. 4
Set point 4
40
N/A
Sl.
U
Slope up between SP
0.0
0.0
Sl. d
Slope down between SP
0.0
0.0
y2S.P
Event Alarm 1set point
300
35
y2Hy
Event Alarm 1 Hysteresis
0.50
0.5
y3S.P
Event Alarm 2set point
300
10
y3Hy
Event Alarm 2 Hysteresis
0.50
0.5
Group 2 Control parameter settings:
Parameter
Description
Default
Customer set
Value
Values
P.b.
Proportional Band
5.0
5.0
t.i.
Integral time
5.0
5.0
t.d.
Derivative time
1.00
1.00
F.Int.
Fuzzy intensity
50
50
t.y
Time for full valve travel
60
40
dy.
Valve movement sensitivity
1.0
1.0
Pot. l
Potentiometer Calibration
N/A
N/A
Group 3 Advanced parameter settings:
Parameter
Description
Default
Customer set
Value
Values
A.Par
Security access
0022
0022
A.tu.
Auto Tune enable
1
1
F.Err
Fuzzy scale
20.0
20
F.der
Fuzzy change on difference
10.00
4.00
t.San
Sampling time
3
15
S.P.L.l
Set point low limit
see Sc.lo
0
S.P.L.h
Set point high limit
see Sc.hi
80
t.F iL
Input filter time constant
0
0
In.Sh
Input Shift
0
0
Sa.y2
Y2 Event safety Action
0
1
Sa.y3
Y3 Event safety action
0
1
Note: For SX75+ models,
the parameters “ S.C.I;
Addr; S.C.b.r; S.C.Pa” for
serial communication will
be present between t.San
and S.P.L.l .
CONFIGURATION INSTRUCTIONS
4) Normal operating mode:
The values in group 3 advanced parameters could be set now. However, it is recommended that
you now proceed to the normal operating mode. This will provide access to the settings of Group 1 (Set point), Group 2 (Control), and Group
3 (Advanced) parameters.
To proceed to normal operating mode press the function key
F
This will display the two groups of configuration codes that have
been set. After 10 seconds the display will time out and return to normal operating mode.
5) Modify a completed configuration code:
To modify the set onfiguration code from the normal operating display,
proceed as follows
Press
F
repeatedly until the controller displays 'ConF' Press
twice.
Using the increment key
and the digit select key
, enter the password 3333.
Press
and follow procedure shown from 1a of this section.
Note: the controller will time out from the configuration back to the normal operating
mode, if a key is not pressed after 30 seconds.
Note: Before switching the power on, check that the controller is wired correctly
(refer to section 4, Electrical wiring).
On power up the controller will display
Co
9999
9999
This indicates that the controller is not configured (the controller will not function without being configured). If it has been configured and you
need to change the configuration, see item 5 of this document.
To configure the controller two sets of code numbers must be entered into the controller. Configuration code group 1, EFGH (Con1), cover the
input type, the output type, and the control and safety action. Configuration code Group 2 ILMN (Con2), cover the event alarms, set point, plus
re-transmission on SX75+ models.
Refer to the Configuration Code table, on the opposite side of this sheet to select the desired configuration settings. Selected codes should be
recorded the "customer configuration and parameter record" sheet.
To enter the desired codes proceed as follows:
1) EFGH Configuration Code (Con1)
Press the enter key
. The controller will display
Adjustments can only be made if a digit of the code displayed is flashing. The flashing will time out after 30 seconds. To restart a flashing
display, press the
key.
1a) H Code setting (Control action and safety position):
The H code value will be flashing to prompt the user to select the desired value.
Press
, to increment the displayed value. When the desired value is displayed, press
to advance to G code setting.
1b) G Code setting (Control output type):
The G code value will be flashing to prompt the user to select the desired value.
Press
, to increment the displayed value. When the desired value is displayed, press
to advance to F code setting.
1c) F Code setting (Input type and scale part 1):
The F code value will be flashing to prompt the user to select the desired value. Press
, to increment the displayed value.
When the desired value is displayed, press
to advance to E code setting.
1d) E Code setting (Input type and scale part 2):
The E code value will be flashing to prompt the user to select the desired value.
Press
, to increment the displayed value. To save the selected EFGH codes, press
. You will now advance to configuration
code group 2 ILMN (Con2).
9 9 9 9
Con 1
EF code setting value
G code setting value
H code setting value
Configuration code EFGH
2) ILMN Configuration Code (Con2)
After the enter key is pressed, the display will show:
2a) N Code setting (Set point type):
The N code value will be flashing to prompt the user to select the desired value. Press
, to increment the displayed value. When
the desired value is displayed, press
to advance to M code setting.
2b) M Code setting (Retransmission output for SX75+ models):
The M code value will be flashing to prompt the user to select the desired value.
Press
, to increment the displayed value. When the desired value is displayed, press
to advance to L code setting.
2c) L Code setting (Event alarm Y3):
The L code value will be flashing to prompt the user to select the desired value. Press
, to increment the displayed value. When
the desired value is displayed, press
to advance to I code setting.
2d) I Code setting (Event alarm Y2):
The I code value will be flashing to prompt the user to select the desired value. Press
, to increment the displayed value.
To save the selected ILMN codes, press
.
Note: You will now advance to setting the configuration parameters. See section 3 below.
3) Configuration Parameters
NOTE: depending on the configuration codes previously set, some of the configuration parameters are
not applicable.
• C_F parameter is only shown for RTD and Thermocouples input ranges (Codes EF)
• Scdd parmeter is only shown for mA / volt inputs types (Codes EF)
• Sc.lo and Schi parameters are only shown for configurable input scales, Configuration code F = 2.
• Sa.Y1 Safety action parameter is only shown when configuration code H=6 or H=7.
3a) "C_F" Celsius or Fahrenheit:
Use the
key to select 0 for °C or 1 for °F. Press the enter key
to set the
desired scale.
3b) "Sc.dd" Decimal Places:
Use the
key to select 1, 2 or 3 decimal places. The default value is 1. Press the enter
key
to select the desired value.
3c) "Sc.lo" Configurable input scale low value:
This will set the low value for for the input scale. Use the increment key
, and the digit select key
to enter the low input scale value. Press the enter key
, to set the desired value.
3d) "Sc.hi" Configurable input scale high value:
This will set the high value for the input scale. Use the increment key
, and the digit select key
to enter the low input scale value. Press the enter key
, to set the desired value.
NOTE:The above will not be shown if the input type selected has a fixed scale range. (ie. EF Code = 10,
sets an RTD with a fixed range from -99.9 to 300.0)
3e) "SA.yl" Configurable safety position for the control output: Note this is only displayed
when configuration code "H" is 6 or 7.
Using the increment key
and the digit select key
to modify the value for the required safety position.
Press the enter key
to set the desired value. This now completes the setting of the configuration codes and configuration
parameters. The controller will advance to Group 3 of the advanced parameters. Please read below.
9 9 9 9
Con 2
I code setting value
L code setting value
M code setting value
Configuration code ILMN
N code setting value
S.P. t
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