Bulletin 949-1265
Instructions for the 16A2 & 16A3 Series
Microprocessor Based
Temperature / Process Control
LOVE CONTROLS DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A e-mail: love@love-controls.com
www.GlobalTestSupply.com
Phone: 219/879-8000
www.love-controls.com
CONTENTS
GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
MODEL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Wiring for 4 to 20mA Transmitter Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Wiring for Optional Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
FRONT PANEL KEY FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Security Level Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
NOTATION CONVENTIONS FOR THE MENUS . . . . . . . . . . . . . . . . . . . . . . . . . .10
THE HOME DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Programming and Operation for Ramp / Soak Feature (16A3 Only) . . . . . . .11
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1
Program Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Ramp / Soak Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
AUTO / MANUAL OPERATION (16A3 ONLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Operation Self Tune Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 6
Theory of Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Program Setup and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 6
OPERATION AND PROGRAMMING OF OPTIONS . . . . . . . . . . . . . . . . . . . . . . .1 7
MENU SELECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
PRIMARY MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
SECONDARY MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
SECURE MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 8
ALARM TYPE AND ACTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
ERROR MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37-39
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 0
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 4
GETTING STARTED
1.
Install the control as described on page 4.
2.
Wire your control following the instructions on page 5. If you are using a two-wire
transmitter as an input, see the drawing and instructions on page 6. Option wiring
instructions are on Page 7. Option descriptions and specific instructions start on
page 13.
3.
Most controls do not need many (if any) program changes to work on your
process. For best results when changing the programming, make all the necessary changes in the Secure Menu (page 28) before making changes to the
Secondary Menu (page 20). If error messages occur, check the Error Messages
on page 37-39 for help.
Take the example of a Model 16A3010 that comes from the factory programmed for
type J thermocouples. Suppose for this example you wish to change the input to a
100 ohm Platinum RTD and limit the set point range between 0° and 300°C.
First enter the Secure menu by pressing and holding the UP ARROW &
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ENTER keys for 5 Seconds (see Page 28.) Press the INDEX key until the display shows 1nP and press the DOWN ARROW until the display shows P385.
Don’t forget to press the ENTER key to retain your setting.
Next, press the INDEX key to display Unit. Press the DOWN ARROW
until the display shows C. Press ENTER.
Next, press the INDEX key until SPL is displayed (pass the dPt and 1nPt selections). Press the UP ARROW until the display shows 0. Press ENTER.
Finally, press INDEX key to display SPH. Press the DOWN ARROW until
the display shows 300. Press ENTER.
The necessary program changes are now complete. After 30 seconds the display will
switch back to the temperature reading. If you want to return faster, press the
UP ARROW and ENTER keys (at the same time) and then press the
DOWN ARROW and INDEX keys (again at the same time). This will ‘back
out’ of the menu and immediately display the temperature reading.
If you want to use Self Tune or Auto/Manual features, see the special sections on
these items. Page numbers for these are in the Contents section on the previous
page.
MODEL IDENTIFICATION
16A ——
Features
2 = Standard
3 = Enhanced
Option Description
992* RS-485 Serial Communications, Lovelink™ protocol.
993* RS-232 Serial Communications, Lovelink™ protocol.
995* RS-232 Serial Communications, Modbus™ protocol.
996* RS-485 Serial Communications, Modbus™ protocol.
9502 12-24 Vdc/Vac 50-400 Hz power supply (control operates on low voltage equipment).
* These options may not be combined with each other. Option 9502 may be combined with any other
options.
Alarm
0 = No
1 = Yes
Output A
1 = SSR
2 = 15 VDC
3 = Relay, NO
4 = Relay, NC
5 = Current
8 = DC SSR
Output B
0 = None
1 = SSR
2 = 15 VDC
3 = Relay, NO
4 = Relay, NC
5 = Current
8 = DC SSR
Options
(blank if none)
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INSTALLATION
Mount the instrument in a location that will not be subject to excessive temperature,
shock, or vibration. All models are designed for mounting in an enclosed panel.
Select the position desired for the instrument on the panel. If more than one instrument is required, maintain the minimum of spacing requirements as shown on the
drawing below. Closer spacing will structurally weaken the panel, and invalidate the
IP66, UL type 4X rating of the panel.
Prepare the panel by cutting and deburring the required opening.
All Tolerances are -0.00 +0.60mm (-0.000 + 0.020 in.)
From the front of the panel, slide the housing through the cut out. The housing gasket should be against the housing flange before installing.
From the rear of the panel slide the mounting collar over the housing. Hold the housing with one hand and using the other
hand, push the collar evenly against the
panel until the spring loops are slightly
compressed. The ratchets will hold the
mounting collar and housing in place.
CAUTION: It is not necessary to remove the instrument chassis
from the housing for installation. If the instrument chassis is
removed from the housing, you must follow industry standard
practice for control and protection against Electro-Static
Discharge (ESD). Failure to exercise good ESD practices may
cause damage to the instrument.
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WIRING
Do not run RTD, thermocouple, or other class 2 wiring in the same
conduit as power leads. Use only the type of thermocouple or
RTD probe for which the control has been programmed. Maintain
separation between wiring of sensor, optional inputs and outputs
and other wiring. See the “Secure Menu” for input selection.
For thermocouple inputs always use extension leads of the same type designated
for your thermocouple.
For supply connections use No. 16 AWG or larger wires rated for at least 75°C.
Use copper conductors only. All line voltage output circuits must hvave a common
disconnect and be connected to the same pole of the connect.
Input wiring for thermocouple, current, and RTD; and output wiring for current and
15 VDC is rated CLASS 2.
Control wiring is as shown (view is from the rear of instrument showing wiring terminals).
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OUTPUTS
(Rear View showing center block of wiring terminals.)
For AC SSR or relay type outputs
(Output Codes 1 or 3), 15 & 16, and 17
Output A
& 18 are normally open. See Rating
Label for details.
Output B
Note: Factory default assigns Output A to Set Point 1 and Output B to Set Point 2.
If necessary, these realtionships may be reversed. See SP 10 in the Secure Menu.
For Pulsed DC, Current, or DC SSR
ouputs (Output codes 2, 4, or 8), 15 &
17 are positive, 16 & 18 are negative.
Wiring for 4 to 20mA Transmitter Inputs
Wiring power and ouputs as shown above. Two-wire transmitters wire as shown
below. View is of instrument as seen from the rear to show wiring terminals.
For three or four-wire transmitters, follow the wiring instructions provided with your
transmitter.
CAUTION: DO NOT WIRE THE 24 VOLT POWER SUPPLY
ACROSS THE INPUT OF THE CONTROL. DAMAGE TO THE
CONTROL INPUT CIRCUITRY WILL OCCUR.
Wiring for Optional Inputs and Outputs
Options are described on Page 3. Detailed option programming and operation
starts on Page 13. Wire power and outputs as shown on Pages 5 and 6. Wiring
for options is shown opposite. All wiring shown above is CLASS 2. Shielded twisted pair is required for Options 992 and 994. Shielded cable is required for Options
993 and 995.
CAUTION: DO NOT RUN SIGNAL WIRING IN THE SAME CONDUIT OR CHASE AS THE POWER WIRING. ERRATIC OPERATION
OR DAMAGE TO THE CONTROL CIRCUITRY WILL OCCUR.
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OPTION/TERMINALS
PV1 PV/SV Retransmission,
Current (e.g. 4-20 mA)
PV2 PV/SV Retransmission,
Voltage (e.g. 0-10V)
992, 996 RS-485 Serial
Communications
993, 995 RS-232 Serial
Communications
11 12 6 7 8
+ + -
B A
Data In Data Out Signal Ground
na na na
na na na
na na na
na na
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FRONT PANEL KEY FUNCTIONS
The decimal point flashes when Self Tune is operating.
Keys are illuminated when pressed. Key functions are as follows:
INDEX: Menu Navigation. Pressing the INDEX key advances the dis-
play to the next menu item. May also be used in conjunction with other
keys as noted below.
UP ARROW: Increments a value, changes a menu item, or selects the
item to ON. The maximum value obtainable is 9999 regardless of decimal
point placement.
DOWN ARROW: Decrements a value, changes a menu item, or selects
the item to OFF. The minimum value obtainable is -1999 regardless of
decimal point placement.
ENTER: Pressing ENTER stores the value or the item changed. If
not pressed, the previously stored value or item will be retained. The display will flash once when ENTER is pressed.
AUTO/MANUAL (16A3): This key toggles the control output between
Automatic mode and Manual mode. Press and hold key for three seconds
to activate. See section on Ramp/Soak (Page 11) for further details.
RUN/HOLD (16A3): This key toggles the Ramp/Soak program functions
between Run mode (program runs as set up), and Hold mode (program
functions are suspended). Press and hold key for three seconds to activate. See section on Auto/Maunal Operation on page 14.
. UP ARROW & ENTER: Menu Access. Pressing these keys simul-
taneously brings up the secondary menu starting at the alarm, tune, or
cycle item (depending on programming). Pressing these keys for 5 seconds will bring up the secure menu.
. INDEX & DOWN ARROW: Menu navigation. Pressing these keys
simultaneously will allow backing up one menu item, or if at the first menu
item they will cause the display to return to the primary menu.
INDEX & DOWN ARROW: Alarm Reset. If an alarm condition has
occurred, press and hold these keys for three seconds to reset the alarm.
Note that the alarm condition will not reset if the alarm condition
still exists.
. INDEX & ENTER: ‘Global Reset’. Pressing these keys simultaneous-
ly and holding them for 5 seconds forces a ‘warm boot’, restart-
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ing the control (similar to turning power off and on). ‘Global Reset’ will allow recovery from errors and reset the following menu items:
AL i.H: Alarm inhibit 0PEn 1nP: Input error
bA nP: Input err CHEC CAL: Check calibration
Correct the problems associated with the above conditions before using the reset
keys. More than one error could present. Caution is advised since several items are
reset at one time.
While in the Primary or Secondary Menu, if no key is pressed for a period of 30
seconds, the display will return to the HOME position displaying the temperature
value. While in the Secure Menu, if no key is pressed for a period of 60 seconds,
the display will return to HOME position displaying the temperature value. Outputs
are disabled (turned off) when the Secure Menu is active.
NOTE: To move the Primary Menu quickly from any other menu, press the
UP ARROW & ENTER keys followed by pressing the INDEX &
DOWN ARROW keys.
SECURITY LEVEL SELECTION
Four levels of security are provided. The display shows the current security level. To
change security levels, change the password value using the UP ARROW and
DOWN ARROW keys and press the ENTER key. Refer to the password
table for the correct value to enter for the security level desired. The SECr menu
item security level may be viewed or changed at any time regardless of the present
security level.
Example: To set security access level to 2, at the SECr menu item, press the
UP ARROW key until the upper display shows the password for level 2 access,
1101. Press the ENTER key. The display will blink and return with the level
value, 2, in the upper display.
The password values shown in the table cannot be altered, so retain a copy of
these pages for reference. This is the only reference made to password values in
this intruction book.
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PASSWORD TABLE
Security Level
Menu Status
Displaying Value
When Viewed
Password Value To
Enter
Primary Locked
Secondary Locked
1 1110
Secure Locked
Primary Unlocked
Secondary Locked
2 1101
Secure Locked
Primary Unlocked
Secondary Unlocked
3 1011
Secure Locked
Primary Unlocked
Secondary Unlocked
4 111
Secure Unlocked
NOTATION CONVENTIONS FOR THE MENUS
Because of the number of features available in this control, information is included
that may not apply to your specific control. All usable features are included in this
book, but may not be used in your process. To increase clarity, the following conventions are used:
1. Certain features, menu items, and function shown in this book may or may not
appear on your control, depending on other menu item selections. At various
places in the menus there are notes identifying menu items that “control” or
“direct” other menu items. If you are looking for a particular menu item and can’t
find it, check the menu item that is it’s “control” for proper setting
2. The “#” symbol is used in two ways. It is used inside group of characters to indicate which set point function (SP1 or SP2) is being affected. It is also used before
a group of characters of a menu item to indicate that there may be more than one
selection or value for that menu item. This is used for certain repeated items such
as in the Ramp/Soak Program section.
Features that apply only to Options will be printed in Italics.
3.
only to the 16A3 Series will be notated in the Roman serif type.
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Features that apply
THE HOME DISPLAY
The home display is the normal display while the control is operating. If no errors or
functions are active, the HOME display will indicate the Process Variable (the temperature, pressure, flow, RH, etc., that is being measured) on the top display and the
Set Variable (Set Point 1) on the bottom.
Items that can change the HOME display are the Auto/Manual function, the
Run/Hold function, the Pro9 function, the Pct0 function, and any error message.
Description of these special displays follows.
If the Auto/Manual key is pressed, the Manual indicator lights, and the home
display is changed. The upper display continues to show the Process Variable (PV),
but the lower display changes to show the percentage of output in tenths of a percent to 99.9% (0.0 to 99.9) or 100 if 100%. The display digit to the right of the number shows a flashing letter o to indicate that the value displayed is no longer the SV,
but percent output. The SP2 percent output is indicated by the use of an overline on
i
the o. Access to the SP2 value is made by the INDEX key. See Auto/ Manual
Operation on Page 14 for further information.
If Pro9 is turned 0n, the HOME display changes the SV display from SP1 to the
Present Set Variable as calculated by the Ramp/Soak Programmer function. See
Programming and Operation for Ramp/Soak Feature below for more information.
If Pct0 (Secondary Menu) is turned 0n, the lower display changes to show the active
percentage of output as required to maintain SP1. The display is similar to the
Auto/Manual display above, except that the percent indicators (o,o) do not flash, and
the output is displayed in whole percentages of output, not in tenths of a percent. If
the control has both SP1 and SP2, the lower display will alternate between the SP1
percent output and the SP2 percent output.
i
Error messages are listed on Pages 37-39.
PROGRAMMING AND OPERATION FOR RAMP / SOAK
FEATURE (16A3 ONLY)
The Ramp / Soak feature offers a great deal of flexibility by allowing changes in the
set point to be made over a predetermined period of time. Dwell times can be programmed, and the alarm output relay can be programmed to open or close during
any of the segments.
Theory of Operation
The 16A3 Series controls offer a very simple approach to programming a ramp.
Rather than requiring the operation to calculate an approach rate (usually in degrees
per minute), the 16A3 does the calculation internally. Thus, the operator only needs
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to program the target set point and the time desired to reach that point. When the
ramp segment is executed by the control, it calculates the ramp required to move
the process from the starting value (current PV) to the desired value (programmed
SP) in the time allowed.
Soaks (or dwells) are ramp segments where the target set point is the same as the
beginning process value. This allows for multistage ramps without wasting intermediate soak steps. Care must be taken, however, that the process does actually reach
the soak value before the soak time starts. If not, the next segment will calculate a
slope from the starting PV to the target SP. Depending on your process requirements, this difference may be important. Make sure to test any program for desired
results before running production material.
Do not operate Self Tune while a ramp function is operating. The ramp function will prevent the Self Tune from operating properly. Make sure that all
tuning is set up before operating Ramp / Soak.
Program Setup
All of the programming for the Ramp / Soak function is done in the Secondary Menu.
You may wish to work out your program on paper before going into the programmer
menu sequence.
In the Secondary Menu INDEX to Pro9 and make sure that Pro9 is set to 0FF.
INDEX to PSEt and turn 0n. Press ENTER.
Skip the StAt setting (this is discussed later) and press INDEX to tbAS.
The time base menu item, tbAS, allows selection of the amount of time that is counted per time unit. Setting tbAS to 1 makes all time settings use a time base of one
second. A tbAS setting of 60 makes all times settings use a time base of 60 seconds, or one minute. Make the appropriate selection and then press ENTER
and INDEX to 1ti.
The following items repeat in the following order: 1ti , 1SP, 1A1 (if AL1 in the Secure
Menu is programmed set to EUnt), 2ti , 2SP, 2A1, . . . , 16ti, 16SP, 16A1. To avoid
repetition each item will only be described once.
Set 1ti to the amount of time you want for the first ramp. This value is in time units
(determined by the tbAS menu item) from 0 to 9999. Press ENTER.
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Set
1SP to the target value desired for the first ramp. This value is in actual units just
like SP1. If the control is programmed for temperature, then the SP displays are in
temperature. If the control is programmed for some other engineering unit, the SP is
set in that unit.
Press INDEX to continue. If Alarm 1 is programmed as an event (AL1 = EUnt),
then 1A1 will appear. If you wish the Alarm 1 contact to function for this segment,
set 1A1 is set to 0n. If not, set for 0FF. Press ENTER. When 1A1 is set 0n, the
Alarm 1 function will be active for entire period set 1t above.
Complete setting the segment times (2ti . . . 16ti ), segment set point (2SP . . .
16SP), and event alarms (2A1 . . . 16A1) to 0n or 0FF.
For unneeded or unused segments set the segment times (2ti . . . 16ti ) to 0, and
set the segment set point (2SP . . . 16SP) to the same value as the last active set
point. A segment alarm may be set to indicate “end of run” at the segment number
you select.
The last menu item for the ramp / soak function is PEnd. PEnd determines what the
control does when the program has ended. You may choose to have the program
repeat (LooP), HoLd the last set point (16SP), revert to the local SP1, or turn the outputs off (0oFF).
It is important to remember that if you want the program to repeat, you must allow
the process to return to the same condition that existed when the program first started. Remember that the ramp function calculates the slope by drawing a line from the
beginning PV to the ramp target set point. If the PV at the end of the program is different than the PV at the initial start, the ramp will calculate differently.
Ramp / Soak Operation
When you wish to start the program, enter the Secondary Menu and set the Pro9
menu item on 0n. Return to the HOME position by waiting for the display to time out
or by pressing the UP ARROW & ENTER keys and then the
DOWN ARROW & INDEX keys.
The home display will read as it normally does. The HOLD indicator by the RUN /
HOLD key will be lit. To start the program press the RUN / HOLD key for
three seconds. The HOLD indicator will go out, and the program will start.
To suspend the program at any time, press the RUN / HOLD key. Press the key
again to resume.
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Pressing the AUTO / MANUAL key will also suspend the program operation.
The difference is that AUTO / MANUAL also puts the control into manual mode. See
Auto / Manual operation on page 14.
The function of the Primary Menu will change depending on the setting of the
StAt menu
item in the Secondary Menu. If StAt is 0FF then the Primary Menu is not changed.
If the StAt menu item is set 0n, then the Primary Menu has three additional information items added before SP1 appears. The first INDEX item displays the time remaining in the current segment in the top display (####), and the message ti , in the
lower display. The next INDEX item displays the total time for the active segment in
the upper display (####) and the message ##ti (1ti . . . 16ti ), in the lower display. The third INDEX item displays the segment set value (####) in the top display,
and the message ##SP (1SP . . . 16SP) in the lower display. The next INDEX press
resumes the normal Primary Menu.
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AUTO / MANUAL OPERATION (16A3 ONLY)
The AUTO / MANUAL function allows you to manually adjust the output of the control. This is normally used during process setup or start up. It can also be used for
troubleshooting. To switch from AUTO to MANUAL press the AUTO / MANUAL key and hold for three seconds. The MANual indicator will light and the lower display will change from normal to showing the actual output in percent. The value will
be the actual percentage of output that was active when the key was pressed. This
is usually known as “bumpless transfer”.
If you wish to change the output while in manual, press the UP ARROW or
DOWN ARROW keys to change the value, and press ENTER to retain it. It is
important to remember that the value of the display can be read as 0 to 100% of the
full control output, or 0 to 100% of the range between S10L and S10H or S20L and
S20H. If APCt is set for rEAL, a reading of 50% in MANUAL represents 10 mA
(Assuming a current output regardless of the S10L and S10H settings.) If APCt is set
for AdJ, then 50% in MANUAL will represent the mid point in output between S10L
and S10H. (Assuming a current output, 4 to 20 mA, with S10L set to 20 and S10H
set to 100, 50% will represent 12 mA.)
To return to AUTOmatic control, press the AUTO / MANUAL key again. The
MANual indicator will go out, and the set point will take over. However, if you want
bumpless transfer back to AUTO, slowly change the percentage of output until the
process variable matches (or at least is close) to the set point. The further away the
PV is from the set point, the greater the “bump” or upset there will be in the out put.
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Operating of Self Tune Function
Self Tune allows automatic selection of the necessary parameters to achieve best
control operation from your 16A2 & 16A3 Series control. If you are using the control output as a simple on-off function (
0ut 1 set for 0n0F), none of the following
will apply.
Theory of Operation
The Self Tune function calculates the Pb1, rES, and rtE parameters under the Pid
tunE selection, and the Fbnd and FrtE parameters, as shown in the Secondary
Menu. These values are determined by measuring the response of the process connection to the control. While in this mode the control measures the overshoot and
undershoot of the process, and the period of the process (the time from peak value
to the next peak value). These measurements are collected over a period that lasts
three periods of overshoot and undershoot. The data collected over this time is effect
of Fuzzy Logic on the process is still controlled by the Fint (fuzzy intensity) setting.
If Fint is 0, the Fbnd and FrtE will be calculated, but will have no effect. The calculations for the PID values are the same as used in the standard Ziegler - Nichols
equations that have been recognized as standard for decades.
The only modification to the application of the Ziegler - Nichols equations is controlled by the dFAC menu item. This menu item controls the amount of rate (derivative) that is applied. A dFAC setting of 3 (factory default) or less allows for less damping. A dFAC setting of 4 allows for critical damping as set forth in Ziegler - Nichols. A
dFAC setting of 5 or more allows over damping of the process.
Program Setup and Operation
Do not cool the process or add heat while the tuning is occurring. In the secondary
menu set tunE to SELF. Skip LErn and check to make sure that dFAC is set to the
desired value. Back up to LErn and set to YES. The control will begin the Self Tune
function. While the Self Tune function is active, the right hand decimal point on the
lower display will blink. When Self Tune is complete, the blinking will stop.
After Self Tune is complete, the tunE setting automatic switches to Pid. This allows
examination and/or modification of the values calculated. We recommended that you
do not change the calculated values unless you have a firm understanding of the
parameters involved and their function.
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OPERATION AND PROGRAMMING OF OPTIONS
Option 992, 993, 995, 996 Serial Communication
The serial communications options allow the control to be written to and read from
a remote computer or other similar digital device. Communication is allowed either
through a RS-485 (Option 992, 996) port, or a RS-232 (Option 993, 995) port.
Wire the communication lines as shown on Page 7. Wiring for the RS-485 is run from
control to control in a daisy chain fashion with a termination resistor (120 ohms)
across the transmit and receive terminals of the last control in the chain.
Select the control address and communication baud rate with the Addr and bAUd
menu items in the Secure Menu.
NOTE: THE BAUD RATE AND ADDRESS MENU ITEM SETTINGS WILL TAKE
EFFECT ON THE NEXT POWER UP OF THE CONTROL. BE SURE TO TURN THE
POWER TO THE CONTROL OFF AND ON BEFORE USING THE NEW BAUD RATE
AND ADDRESS VALUES.
In operation, you have the option of preventing a write command from the host computer. To prevent the host from writing to the control change the L0rE menu item in
the Secondary Menu to L0C. To allow the host to write commands to the control set
L0rE to rE. (The host does have the ability to change the L0rE state, but it is not
automatic.)
If your system depends on constant reading or writing to and from the host, you may
wish to set the No Activity Timer (nAt) to monitor the addressing of the control. When
the L0rE is set to rE and the nAt is set to any value other than Off, the control will
expect to be addressed on a regular basis. If the control is not addressed in the time
set by the value of nAt, then the control will display the error message CHEC L0rE.
To clear the message set L0rE to L0C.
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Serial Communications
Options and Non-volitile Memory
There are many different types of memory used in computer driven devices. The
terms RAM (random access memory) and ROM (read only memory) are a couple
with which you may be familiar.
RAM is used in computers to run programs and hold data for a short period of time.
This is the memory that is used primarily in PCs. RAM is very fast and can be read
and written to over and over again.
ROM is used in computers to hold the ‘permanent’ programming that allows a PC
to start. This memory is ‘burned in’ to the chip itself and can not be changed. Unlike
RAM, however, this memory is permanent. While it can not be changed, it can not
lose its programming when power is turned off.
There is a third type of memory that is now currently used to combine the characteristics of both RAM and ROM. This is known as EEPROM (electrically erasable programmable read only memory). While the name may be long and somewhat cryptic,
the EEPROM can be erased and re-written many times, and yet hold the programmed data even over long periods of time when the power is off. This is the type
of memory that all Love Controls uses to save the settings your program in your control. The reliability and longevity of the data retention is what allows us to guarantee
a 10 year data retention without power.
In normal operation, the control uses RAM, just as any other computerized device.
Whenever you make a change to one of the parameters in the control, the set point
for example, the new value is written into the EEPROM. This way, if power goes off
for whatever reason, when power resumes, the latest settings are preserved. When
power is turned on, the data is copied from the EEPROM to the RAM to begin operation.
If EEPROM is such a wonderful thing, you might ask, why bother with RAM? One
reason is that RAM is much faster than EEPROM. Faster speed gives you better performance in critical control functions.
Perhaps the most important reason is that EEPROM has a limit to the number of
times it can be erased and re-written. Current technology now sets that limit at about
one million erase/write cycles. In a dynamic control situation, it may be necessary to
update RAM every few milliseconds. EEPROM can not keep up to that pace, and,
even if it could, it would be ‘used up’ in a matter of days.
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If you think about how long it would take a million changes to the control programming through the front key pad, you will see that it would take a very long time to get
to use up the life of the EEPROM.
Adding one of the computer communications options (e.g. 992, 993) changes the
picture. The speed of computer communications is such that hundreds of instructions can be made in less than a minute. In such a situation, the million erase/write
cycles could be used up in a couple of months causing the control to fail.
Usually in such a situation, the control is under close observation by the host computer. It may not be necessary, then to the data written to the EEPROM, as it is ‘transitory’ in nature (changing set points for a ramp/soak sequence for example).
All 16A Series controls with communications options made before April 2001 are
only able to write to the EEPROM. Controls manufactured after this date have a
menu item in the Secure menu (
Stor) that allows the serial communications to write
to RAM (Stor = no) with a special write command that allows to EEPROM to be
updated or written directly to EEPROM (protocol command 0442).
The factory default is ‘write to EEPROM’ (Stor = YES).
If your computer system will be making frequent changes to the control we strongly
recommend that you select the ‘write to RAM’ parameters (Stor = no). If you are pri-
marily reading from the control, there is no need to change the setting.
Any instruments equipped with any Serial Communications are limited
to one million WRITE cycles to the EEPROM through the Serial
Communications Port. Exceeding this limit will generate a
F A 1 L t E St error. There is no limit to the number of times you can
READ from this instrument EEPROM.
Make sure that the software you use does not write too often to the instrument.
If you have any questions regarding how your software works with the instrument(s),
contact your System Administrator, Programmer, or Software Supplier.
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MENU SELECTIONS
PRIMARY MENU
Press INDEX to advance to the next menu item. Press UP ARROW or
DOWN ARROW to change the value in the display. Press ENTER to
retain the value. If StAt, (Secondary Menu [16A3]), is 0n, the three program status
menu items shown on Page 14 will precede the folowing.
SP1 Set Point 1 Adjust, Control Point 1.
SP2 Set Point 2 Adjust (if equipped), Control Point 2.
SECONDARY MENU
Hold UP ARROW & ENTER. Press INDEX to advance to the next
menu item. Press UP ARROW or DOWN ARROW to change the value
in the display. Press ENTER to retain the value.
A1Lo Alarm 1 Low: The Low Alarm point is usually set below the Set Point. May
not appear depending on AL1 setting in Secure Menu.
A1Hi Alarm 1 High: The High Alarm Point is usually set above the Set Point. May
not appear depending on AL1 setting in Secure Menu.
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0ut1 Output selection: Select 0n0F, #tP, #PuL, or ProP.
0n0F A setting of 0n0F allows the control to operate in simple on/off
mode. This setting forces the control to turn off at set point, and
on at the set point plus the differential (SP1d). When selected,
the 0ut1 0n0F menu items is followed by #### SP 0d, and
the tunE, Pb, rES, 510L and 510H selections in the Secure
menu are suppressed.
SP1d Set Point On-Off Differential (hysteresis). Set for the
amount of difference between the turn off point and the
turn on point. Select 1 to 9999 (direct acting), or -1 to
-9999 (reverse acting). This value will be negative for
reverse acting set points, and positive for direct acting
outputs. The following drawings shows output behavior
for reverse and direct action. For reverse action note how
the output decreases as the input process variable
increases, e.g. heat power goes to zero as the
temperature increases to set point.
##tP Time Proportioning Cycle Time. Select 1tP to 80tP.
1tP A setting of 1tP is recommended for solid state outputs
(SSR or 15VDC).
2tP to 80tP Time Proportioning Control is adjustable in 1
second steps. Recommended for mechanical outputs
(relays, solenoids, etc.). For best contact life, a time
should be selected as long as possible without causing
the process to wander.
#PuL Pulsed Time Proportioning Output: Select 1PuL to
7PuL. 1PuL = Linear and 7PuL = most nonlinear. Changes
output linearity for use in cooling applications or for
extremely fast response processes. At the center of the
proportional band, a pulse value of 1 provides an output
of one second on and one second off (50% output). A
pulse value of 2 provides an output of one second on and
two seconds off (33% output). Output at center of band
equals one second on, 2
ProP For Current (Code 5) outputs only.
(pulse value-1)
seconds off.
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The following menu items apply only if your control is equipped with a second set point (last digit of model number is not zero). If your control does
not have a second set point, jump to the tunE menu on the next page.
0ut2 Output selection: Select OnOF, #tP, #PuL, or ProP.
0n0F A setting of 0n0F allows the control to operate in simple on/off
mode. This setting forces the control to turn off at set point, and
on at the set point plus the differential (SP2d). When selected,
the 0ut2/0n0F menu item is followed by #### SP2d, and the
Pb2 selection in the Secondary menu and the S20L and S20H
selections in the Secure menu are suppressed.
SP2d Set Point On-Off Differential (hysteresis). Select 1 to
9999 (direct acting), or -1 to -9999 (reverse acting).
See SP1d on the previous page.
##tP Time Proportioning Cycle Time. Select 1tP to 80tP.
1tP A setting of 1tP is recommended for solid state outputs
(SSR or 15VDC).
2tP to 80tP Time Proportioning Control is adjustable in 1
second steps. Recommended for mechanical outputs
(relays, solenoids, etc.). For best contact, life, a time
should be selected as long as possible without causing
the process to wander.
#PuL Pulsed Time Porpotioning Output: Select 1PuL to 7PuL.
1PuL = Linear and 7PuL = most nonlinear. Changes
output linearity for use in cooling applications or for
extremely fast response processes. At the center of the
proportional band, a pulse value of 1 provides an output
of one second on and one second off (50% output). A
pulse value of 2 provides an output of one second on and
two seconds off (33% output). Output at center of band
equals one second on, 2(pulse value -1) seconds off.
ProP For Current (Code 5) outputs only.
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SP
(Option 948, 4-Stage Set Point) Active Set Point Stage. Select
35P1, 45P1
1SP1
25P1
35P1
45P1
. (See Page 17 for more detail.)
Set Menu Items to display Stage 1 for view and change access. If
SPSA
is set for
1nt, 1SP1
is made active.
Set Menu Items to display Stage 2 for view and change access. If
SPSA
is set for Int,
25P1
is made active.
Set Menu Items to display Stage 3 for view and change access. If
SPSA
is set for Int,
35P1
is made active.
Set Menu Items to display Stage 4 for view and change access. If
SPSA
is set for
1nt, 45P1
is made active.
1SP1, 25P1
,
#SP1
(Option 948, 4-Stage Set Point) Adjust Control Point 1 for Stage selected
above.
Note: The menu items for tunE (below) are modified when Option 948 is active.
Then, the menu items are shortened or shifted right, and preceded with the stage
number selected in SP above. Each stage has its own set of tunE parameters as
indicated by #tun.
#tun
tunE Tuning Choice: Select SELF, Pid, SL0, nor, or FASt.
(Option 948, 4-Stage Set Point) or
SELF The Controller will evaluate the Process and select the PID values
to maintain good control. Active for SP1 only.
LErn Select YES or no
YES Start Learning the Process. After the process has
been learned the menu item will revert to no.
no Learning will stay in present mode.
dFAC Damping factor, select 0FF, 1 to 7. Sets the ratio of Rate
to Rate for the SEL tunE mode. 7 = most Rate. Factory set
to 3. For a fast response process the value should be lowered (less Rate). For a slower process the value should be
increased (more Rate).
Pid Manually adjust the PID values. PID control consists of three basic
parameters, Proportional Band (Gain), Reset Time (Integral), and
Rate Time (Derivative).
Pb1 Proportional Band (Bandwidth). Select 1 to 9999°F, °C,
or counts.
Pb2 Proportional Band (Bandwidth). Select 1 to 9999°F, °C,
or counts. Appears only if control is equipped with second
set point and 0ut2 is NOT selected as 0n0F.
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rES Automatic Reset Time. Select 0FF, 0.1 to 99.9 minutes.
Select 0FF to switch to 0FS.
0FS Manual Offset correction Select. Select 0FF, 0.1 to 99.9
percent. Select 0FF to switch to rES.
rtE Rate Time. Select 0FF, 0.1 to 99.9 minutes. Derivative.
SL0 PID values are preset for a slow response process.
nor PID values are preset for a normal response process.
FASt PID values are preset for a fast response process.
Pid2 Linkage of PID parameters between SP1 and SP2: Select 0n or 0FF.
0n Applies SP1 rES, rtE, Fbnd, and FrtE terms to SP2 for heat/cool
applications
0FF SP2 functions without rES, rtE, Fbnd, and FrtE .
ArUP Anti- Reset Windup Feature: Select 0n or 0FF.
0n When ArUP is 0n the accumulated Reset Offset value will be
cleared to 0% when the process input is not within the Proportional
Band.
0FF When ArUP is 0FF, the accumulated Reset Offset value is retained
in memory when the process input is not within the Proportional
Band.
ArtE Approach Rate Time: Select 0FF, 0.01 to 99.99 minutes. The function
defines the amount of Rate applied when the input is outside of the
Proportional Band. The ArtE time and the rtE time are independent and
have no effect on each other. To increase damping effect and reduce overshoot set the approach rate time for a value greater than the natural rise time
of the process (natural rise time = process value time to set point).
Fint Fuzzy Logic Intensity: Select 0 to 100%. 0% is OFF (disables Fuzzy Logic).
The function defines the amount of impact Fuzzy Logic will have on the
output.
Fbnd Fuzzy Logic Error Band: Select 0 to 4000 °F, °C, or counts. Sets the band
width of the Fuzzy Logic. Set Fbnd equal to PID proportional band (Pb1) for
best results.
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FrtE Fuzzy Logic Rate of Change: Select 0.00 to 99.99 counts/second. For best
initial setting, find the counts/second change of process value near Set Point
1 with output ON 100%. Multiply this value by 3. Set FrtE to this
calculated value.
PEA The Peak feature stores the highest input the control has measured since
the last reset or Power On. At Power On PEA is reset to the present input.
To manually reset the value PEA must be in the lower display. Press the
ENTER key to reset. PEA will be reset and display the present input value.
UAL The Valley feature stores the lowest input the Instrument has measured
since the last reset or Power On. At Power On UAL is reset to the present
input. To manually reset the value UAL must be in the lower display. Press
the ENTER key. UAL will be reset and display the present input value.
Pct0 Percent Output Feature: Select 0n or 0FF.
0n When selected 0n, the HOME lower display will indicate the output
of the controller in percent. An “o” will appear in the right hand side
of the lower display to indicate percent output for SP1. An “ ” will
~
o
appear on the right hand corner of the lower display to represent
percent output for SP2, if the control is so equipped. The display
will alternate between these values.
0FF Percent Output display is disabled.
Pro9 Ramp/Soak Feature (16A3): Select 0n or 0FF.
0n Allows Programmed Ramp/Soak function to be started by the
Run/Hold key on the control front panel.
0FF Turns Ramp/Soak function 0FF and resets program to
beginning.
PSEt Programmer function set (16A3): Select 0n or 0FF.
0FF Skip Ramp/Soak Programming. Go to next Secondary Menu
1nPC on the next page.
Item,
0n Enable Ramp/Soak Programming.
StAt Programmer Status Display in the Primary Menu when Prog (above) is
On (16A3):
0FF The Primary Menu operates as normal.
0n The Primary Menu is altered to have the following items
Select 0n or 0FF.
inserted before the SP1 menu item:
#### ti time remaining in active segment
#### ##ti total time in active segment
#### ##SP segment target set point
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tbAS
Ramp/Soak Time Base (16A3): Select 1_S or 60_S.
1_S Ramp/Soak time base is in 1 second increments. Program time
1ti ...16ti is measured in seconds.
60_S Ramp/Soak time base is in 60 second increments (minutes).
Program time
1ti ...16ti is measured in minutes.
The following items repeat in the following order:
grammed as
EUnt), 2ti , 2SP, 2A1, . . . , 16ti, 16SP, 16A1. To avoid repetition
1ti ,1SP,1A1 (if AL1 is pro-
each item will only be described once.
1ti Segment Time (16A3): Select 0 to 9999 units (minutes if tbAS is set to
60_S, seconds if tbAS is set to 1_S).
1SP Segment Set Point (16A3): Set to target value desired.
1A1 Segment Alarm 1 Event (16A3): Select 0n or 0FF.
0n Alarm 1 is active during segment 1 time (1ti).
0FF Alarm 1 is inactive during segment 1 time (1ti).
PEnd Program End Action (16A3): Select HoLd or 0oFF.
HoLd Stay at the Present Set Point (16SP).
0oFF Turn Off SP1 and SP2 Outputs at the end of the program.
LooP Repeat program starting at1t.
SP1 Revert to SP1 value.
1nPC Input Correction: Select -500 to 0 to 500 °F, °C, or counts. This feature
allows the input value to be changed to agree with an external reference or
to compensate for sensor error. Note: 1nPC is reset to zero when the input
type is changed, or when decimal position is changed. Factory default is 0.
FiLt Digital Filter: Select 0FF, 1 to 99. In some cases the time constant of the
sensor, or noise, could cause the display to jump enough to be unreadable.
A setting of 2 is usually sufficient filtering (2 represents approximately a 1
second time constant). When the 0.1 degree resolution is selected this
should be increased to 4. If this value is set too high, controllability will
suffer.
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LPbr Loop Break Protection: Select 0FF, 1 to 9999 seconds. If, during operation,
the output is minimum (0%) or maximum (100%), and the input moves less
than 5°F (3°C) or 5 counts over the time set for LPbr, the L00P bAd message will appear. This condition can also be routed to an Alarm Condition if
alarms are present and turned On (see ALbr in the Secure Menu). The loop
break error can be reset by pressing the ENTER key when at the LPbr
menu item. The INDEX & ENTER keys may also be used.
L0rE
P0L
P0H
P0Sr
(Option 992, 993, 995, 996, Serial Communications) Local / Remote Status:
Select
L0C
or rE. Does not affect other instruments on daisy chain.
L0C
The host computer is advised that remote write commands will be
rejected. Any write commands sent to this control will be rejected.
All read commands are accepted.
rE
The host computer is allowed to send write commands. If the
control is not addressed within the time set in
Timer in the Secure Menu) the
CHEC LorE
nAt
(No Activity
error message will be
displayed.
(Option 934, 936, Analog Retransmission Output) Process Output
Low: Select -450°F, -260°C, or -1999 counts to any value less than
P0H
.
(Option 934, 936, Analog Retransmission Output) Process Output
High: Select from any value greater than
P0L
to + 9999°F, +5530°C, or
9999 counts.
(Option 934, 936, Analog Retransmission Output) Process Output
Source: Select
1nP
SPt
Process output follows the Process Variable (input).
Process output follows the Set Variable (SP1).
1nP
or
SPt
.
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Unit F, C or nonE.
F
°F descriptor is On and temperature inputs will be displayed in
actual degrees Fahrenheit.
C °C descriptor is On and temperature inputs will be displayed in
actual degrees Celsius.
nonE °F and °C descriptors will be Off. This is only available with Current
and Voltage Inputs.
dPt Decimal Point Positioning: Select 0, 0.0, 0.00, 0.000, or .0000. On
temperature type inputs a change here will alter the Process Value, SP1,
SP2, ALLo, ALHi, and InPC. For current and voltage Inputs all Menu Items
related to the Input will be affected.
0 No decimal Point is selected. This is available for all Input Types.
0.0 One decimal place is available for Type J, K, E, T, L, RTD’s, Current
and Voltage Inputs.
0.00 Two decimal places is only available for Current and Voltage Inputs.
0.000 Three decimal places is only available for Current and Voltage
inputs.
.0000 Four decimal places is only available for Current and Voltage inputs.
1nPt Input Fault Timer: Select 0FF, 0.1 to 540.0 minutes. Whenever an Input is
out of range (UFL or 0FL displayed), shorted, or open, the timer will start.
When the time has elapsed, the controller will revert to the output condition
selected by 1nPb below. If 0FF is selected, the Input Fault Timer will not be
recognized (time = infinite).
1nPb Input Fail Action (16A3): Select FA1L, AUE, or PrE. When the Input is
out of range
(UFL or 0FL displayed) and the Input timer (1nPt) time has
elapsed, the controller will revert to the selected condition.
FA1L Outputs are disabled (go to 0% output).
AUE The outputs will hold at the last known average percentage of
output.
PrE The outputs will maintain preprogrammed percentages of
output as specified in
PrE1 Preset output for Set Point 1. Select 0 to 100%.
PrE2 Preset output for Set Point 2. Select 0 to 100%.
PrE1 and PrE2.
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APCt Manual and PctO display adjustment (16A3). Select rEAL or AdJ.
rEAL Manual display will display output 0 to 100% relative to actual
range of the output.
AdJ Manual display will display output 0 to 100% relative to the
S#0L and S#0H settings.
SEnC Sensor Rate of Change: Select 0FF, 1 to 4000 °F, °C, or counts per 1
second period. This value is usually set to be slightly greater than the fastest
process response expected during a 1 second period, but measured for at
least 2 seconds. If the process is faster than this setting, the SEnC bAd
error message will appear. The outputs will then be turned off. This function
can be used to detect a runaway condition, or speed up detection of an
open thermocouple. Use the INDEX & ENTER keys to reset.
SCAL Scale Low: Select 100 to 11998 counts below SCAH. The total span
between SCAL and SCAH must be within 11998 counts. Maximum setting
range is -1999 to +9999 counts. For Current and Voltage inputs, this will set
the low range end. Value not adjustable for Thermocouple and RTD ranges.
SCAH Scale High: Select 100 to 11998 counts above SCAL. The total span
between SCAL and SCAH must be within 11998 counts. Maximum setting
range is -1999 to +9999 counts. For Current and Voltage inputs, this will set
the high range end. Value not adjustable for Thermocouple and RTD ranges.
SPL Set Point Low: Select from the lowest input range value to SPH value. This
will set the minimum SP1 or SP2 value that can be entered. The values for
SP1 or SP2 will stop moving when this value is reached.
SPH Set Point High: Select from the highest input range value to SPL value. This
will set the maximum SP1 or SP2 value that can be entered. The values for
SP1 or SP2 will stop moving when this value is reached.
SP10 Set Point 1 Output Select: Select 0utA or 0utb.
0utA Set Point 1 is routed through Output A, Set Point 2 (if equipped) is
routed through Output B.
0utb Set Point 1 is routed through Output B, Set Point 2 (if equipped) is
routed through Output A.
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S1St Set Point 1 state : Select dir or rE.
dir Direct Action. As the input increases the output will increase. Most
commonly used in cooling processes.
rE Reverse Action. As the input increases the output will decrease.
Most commonly used in heating processes.
If 0ut1 (Page 21) is set for ##tP, #PUL, or ProP, then S10L and S10L
appear. If 0ut1 is set for 0n0F, then skip S1rE.
S10L Set Point Output Low Limit. Select 0 to 100% but not greater than S10H.
This item limits the lowest output value. This is useful for adding a bias to
the process when needed. Factory set to 0 for outputs codes 1, 2, 3, 4,
and 8. Factory set to 20 for output code 5 (20% out put equals 4 mA
output).
S10H Set Point 1 Output High Limit. Select 0 to 100% but not less than S10L
for output codes 1, 2, 3, 4, or 8. Select 0 to 102% but not less than
S10L for output code 5. This item allows setting the maximum output
limit. This is useful with processes that are over powered. Adjustment to
102% allows seeting current output to force a full on condition for output
devices which do not have bias adjustments. Factory set to 100 for all
output codes.
If 0ut1 is set for ##tP, #PUL, or ProP, then skip to S1LP below.
If 0ut1 is set to 0n0F (in Secondary Menu), then the next three menu items can
make the SP1 and SP1d settings act like a high or low alarm set point. See the
information on alarm settings and the cautions and warnings that apply to them on
Pages 30-31.
Note that when Set Point 1 Power Interrupt, S1P, is 0n, and Set Point 1 Reset,
S1rE, is programmed to HoLd, the SP1 output will automatically reset upon a
power failure and subsequent restoration, if the process is below SP1.
S1rE Set Point 1 Reset. Select 0n0F or HoLd.
0n0F Output will automatically reset when process passes back
through SP1d.
HoLd Manual Reset. Reset by simultaneously pressing the
INDEX & DOWN ARROW keys for 3 seconds.
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S1Pi Set Point 1 Power Interrupt. Select 0n or 0FF.
0n Alarm Power Interrupt is 0n. Output will automatically
reset on power-up if no alarm condition exists.
0FF Alarm Power Interrupt is 0FF. Output will be in the
alarm condition on power-up regardless of condition of
process.
S1iH Set Point 1 Inhibit: Select 0n or 0FF.
0n Alarm Inhibit is On. Alarm action is suspended until the
process value first enters a non-alarm condition.
0FF Alarm Inhibit is OFF.
S1LP Set Point Lamp: Select 0 on or 0oFF.
0 on Lamp ON when Output is ON.
0oFF Lamp OFF when Output is ON.
I
f your control is not equipped with Set Point 2, then proceed to the
alarm section (next page).
S2t Set Point 2 type: Select Ab or dE.
AbS Absolute SP2. SP2 is independent of SP1, and may be
set anywhere between the limits of SPL and SPH.
dE Deviation SP2.
SP2 is set as a deviation from SP1, and
allows SP2 to retain its relationship with SP1 when SP1
is changed (SP2 tracks SP1).
S2St Set Point 2 State: Select dir or rE.
dir Direct Action. As the input increases the output will
increase. Most commonly used in cooling processes.
rE Reverse Action. As the input increases the output will
decrease. Most commonly used in heating processes.
If 0ut2 is set for ##tP, #PUL, or ProP, then S20L and S20H appear. If 0ut2
is set for 0n 00F, then skip S20L and S20H.
S20L Set Point Output Low Limit: Select 0 to 100% but not greater than
S20H. This item limits the lowest output value. This is useful for
adding a bias to the process when needed. Factory set to 0 for
output codes 1,2, 3, 4, and 8. Factory set to 20 for output code 5
(20% output equals 4 mA output).
S20H Set Point 2 Output High Limit: Select 0 to 100% but not less than
S20L for output codes 1, 2, 3, 4, or 8. Select 0 to 102% but not
less than S20L for output code 5. This item allows setting the
maximum output limit. This is useful with processes that are over
powered. Adjustment to 102% allows setting current output to
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force a full on condition for output devices which do not have bias
adjustments. Factory set to 100 for all output codes.
If 0ut2 is set to 0n0F (in the Secondary Menu), then the next three menu
items can make the SP2 and SP2d settings act like a high or low alarm set
point. See the information on alarm settings and the cautions and warnings
that apply to them on the next pages.
Note that when Set Point 2 Power Interrupt , S2Pi is On, and Set Point
2 Reset, S2rE, is programmed to Hold, the SP2 output will automatically
reset upon a power failure and subsequent restoration, if the process is
below SP2.
S2rE Set Point 2 Reset. Select 0n0F or Hold.
0n0F Output will automatically reset when process passes
back through SP2d.
HoLd Manual Reset. Reset (acknowledge) by simultaneously
pressing the INDEX & DOWN ARROW keys
for 3 seconds.
S2Pi Set Point 2 Power Interrupt. Select On or OFF.
0n Alarm Power Interrupt is On. Output will automatically
reset on power-up if no alarm condition exists.
0FF Alarm Power Interrupt is OFF. Output will be in the alarm condition
on power-up regardless of condition of process.
S2iH Set Point 2 Inhibit: Select On or OFF.
0n Alarm Inhibit is On. Alarm action is suspended until the
process value fi rst enters a non-alarm condition.
0FF Alarm Inhibit is OFF.
S2LP Set Point 2 Lamp: Select O on or OoFF.
0on Lamp ON when Output is ON.
0oFF Lamp OFF when Output is ON.
ALARM TYPE AND ACTION (if alarm function is present)
Caution: In any critical application where failure could
cause expensive product loss or endanger personal safety,
a redundant limit controller is required.
When setting an alarm value for an absolute alarm (A1t = AbS), simply set
the value at which the alarm is to occur
. When setting the alarm value for a devia-
tion alarm (A1t = dE), set the difference in value from the Set Point desired. For
Page 33
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example if a low alarm isrequired to be 5 degrees below the Set Point, then set
A1Lo to -5. If a high alarm is required 20 degrees above the Set Point, then set
A1Hi to +20. If the Set Point is changed, the alarm will continue to hold the same
relationship as originally set.
The diagram below shows the action and reset functions for both absolute
and deviation alarms.
Note that when Alarm Power Interrupt, A1Pi, is programmed ON and Alarm
Reset, A1rE, is programmed for Hold, the alarm will automatically reset
upon a power failure and subsequent restoration if no alarm condition is
present.
If Alarm Inhibit, A1iH, is selected ON, an alarm condition is suspended
upon power up until the process value passes through the alarm set point
once. Alarm inhibit can be restored as if a power up took place by pressing
both the INDEX and ENTER keys for 3 seconds.
WARNING: IF INHIBIT IS ON AND A POWER FAILURE OCCURS
DURING A HIGH ALARM, RESTORATION OF POWER WILL NOT
CAUSE THE ALARM TO OCCUR IF THE PROCESS VALUE
DOES NOT FIRST DROP BELOW THE HIGH ALARM SETTING.
DO NOT USE THE ALARM INHIBIT FEATURE IF A HAZARD IS
CREATED BY THIS ACTION. BE SURE TO TEST ALL COMBINA
TIONS OF HIGH AND LOW ALARM INHIBIT ACTIONS BEFORE
PLACING CONTROL INTO OPERATION.
Page 34
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The following menu items apply only to the alarm.
AL1 Alarm 1 function: Select 0FF, Lo, Hi, HiLo, or EUnt.
0FF Alarm 1 is disabled. No Alarm 1 menu items appear in the
Secondary or Secure menus.
Lo Low Alarm Only. A1Lo appears in the Secondary
Menu.
Hi High Alarm Only. A1Hi appears in the Secondary Menu.
HiLo High and Low Alarms. Both A1Lo and A1Hi appear in the
Secondary Menu, and share the same Alarm 1 Relay output.
EUnt Alarm 1 is controlled by the Ramp/Soak program function.
(16A3). See Pages 11-14 and 26 (#A1) for further information.
If AL1 is set to 0FF and the control is not equipped with options, the Secure Menu
ends here. If AL1 is set to 0FF and the control is equipped with options, proceed to
SPSA, Addr, or rSCL below.
If AL1 is set to EUnt, go to A1St below.
A1t Alarm 1 Type: Select AbS or dE
AbS Absolute Alarm that may be set anywhere within the values of SCAL
and SCAH and is independent of SP1.
dE Deviation Alarm that may be set as an offset from SP1. As SP1 is
changed the Alarm Point will track with SP1.
A1rE Alarm 1 Reset: Select 0n0F or HoLd.
0n0F Automatic Reset.
HoLd Manual Reset. Reset (acknowledge) by simultaneously pressing the
INDEX & DOWN ARROW keys for 3 seconds.
A1Pi Alarm 1 Power Interrupt: Select 0n or 0FF.
0n Alarm Power Interrupt is 0n.
0FF Alarm Power Interrupt is 0FF.
A1iH Alarm 1 Inhibit: Select 0n or 0FF.
0n Alarm Inhibit is 0n. Alarm action is suspended until the process
value first enters a non-alarm condition.
0FF Alarm Inhibit is 0FF.
A1St Alarm 1 Output State: Select CL0S or 0PEn.
CL0S Closes Contacts at Alarm Set Point.
0PEn Opens Contacts at Alarm Set Point.
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Page 35
A1LP Alarm 1 Lamp: Select 0on or 0oFF.
0on Alarm Lamp is ON when alarm contact is closed.
0oFF Alarm Lamp is OFF when alarm contact is closed.
A1Lb Alarm 1 Loop Break. Select 0n or 0FF.
0n Loop Break Condition will cause an Alarm Condition.
0FF Loop Break will not affect the Alarm Condition.
Addr
(Option 992, 993, 995, 996, Serial Communications) Control Address: Set
from 1to
3FF
for Options 992 and 993. Set from 1 to FF for options 993
and 995. This number (hexadecimal, base 16) must match the address
number used by the host computer. Power to instrument must be turned off
and on before change takes effect (see Page14).
bAUd
(Option 992, 993, 995, 996, Serial Communications) Communication Baud
Rate: Select
300,1200, 2400, 4800, 9600
(baud),
19.2, 28.8
, or
57.6
(kbaud) for Options 992 and 993. Select 300, 1200, 2400, 4800, 9600
(baud) or 19.2 (kbaud) for Options 995 and 996. This number must match
the baud rate used by the host computer. Power to instrument must be
turned off and on before change takes effect (see Page 14).
nAt
(Option 992, 993, 995, 996, Serial Communications) No Activity Timer:
Select
1- 99
0FF
0FF
or 1 to 99minutes.
Maximum time between host computer accesses. If timer counts
to 0,
CHEC LorE
will be displayed.
No Activity Timer function is disabled.
Stor (Option 992, 993, 995, 996 Serial Communications) Store to EEPROM:
Select
YES
or no. (See additional information on page 18).
YES
Menu Items changes made through the Serial Communications are
stored directly to the EEPROM.
no
Menu items changes made through the Serial Communications are
stored directly in RAM.
Page 36Page 36
www.GlobalTestSupply.com
ERROR MESSAGES
Any error message may be cleared by using the ‘Global Reset’ by pressing
and holding the INDEX & ENTER keys for five seconds.
DISPLAY MEANING
ArEA
(Alternates
with PV)
ArEA
This message
appears if the
ambient temperature of the control
approaches the
ends of tolerance.
This message
appears
if the ambient
temperature of the
control is out of
range
or RJC sensor is
broken.
www.GlobalTestSupply.com
SP
OUTPUTS
Set point out-
puts
active.
Alarm active.
Set point out-
puts
active.
Alarm active.
ACTION
REQUIRED
Correct the ambient tempera-
ture
conditions. Ventilate the
area of the cabinet or
check for clogged filters.
If internal temperature
sensor is broken
(RJC located in terminal 2)
return to service.
Correct the ambient tempera-
ture
conditions. Ventilate the area of
the cabinet or
check for clogged filters.
If internal temperature
sensor is broken,
return for service.
,
Page 37
ERROR MESSAGES
Any error message may be cleared by using the ‘Global Reset’ by pressing
and holding the INDEX & ENTER keys for fi ve seconds.
DISPLAY
UFL
or
0FL
bAd
1nP
0PEn
1nP
L00P
bAd
SEnC
bAd
MEANING
Underflow or Overflow:
Process value has
exceeded input range
ends.
UFL or 0FL will
sequence to display
one of these messages
if the InPt is set for a
time value.
For RTD inputs RTD is
open or shorted. For
THERMOCOUPLE
inputs thermocouple
is open.
The sensor may be
defective, heater fuse
open, heater open, or
the final power output
device is bad.
Sensor Rate of
Change exceeded
the programmed
limits set for
SEnC.
SP OUTPUTS
Set point outputs
active.
Alarm active.
Set point outputs
inactive.
Alarm active.
Set point outputs
inactive.
Alarm active.
Set point outputs
inactive.
Alarm active.
ACTION REQUIRED
May be normal if Input signals
go above or below range ends.
If not the case, check sensor,
input wiring and correct.
When
1nPt (input fault timer)
has been set for a time, the
outputs will be turned off after
the set time. Setting the time
to
0FF causes the outputs to
remain active, however
0FL will still be displayed.
Correct or replace sensor.
Clear with ‘Global Reset’.
Correct or replace sensor, or
any element in the control loop
that may have failed.
Correct the problem.
Check for the cause of the
error. The value setting may
be too slow for the process, or
the sensor is intermittent.
Correct the problem.
UFL or
CHEC
CAL
Page 38
Check calibration
appears as an
alternating message
if the instrument cali-
bration nears tolerance
edges.
Check calibration
appears as a flashing
message if the instru-
ment calibration
exceeds specification.
www.GlobalTestSupply.com
Set point outputs
inactive.
Alarm active.
Set point outputs
inactive.
Alarm active.
Remove the instrument for
service and / or recalibration.
Remove the instrument for
service and / or recalibration.
ERROR MESSAGES
Any error message may be cleared by using the ‘Global Reset’ by pressing
and holding the INDEX & ENTER keys for fi ve seconds.
DISPLAY MEANING SP OUTPUTS
No display
lighted
FA1L
tESt
CHEC
SP1,
CHEC
SP2,
CHEC
1SP, ... ,
CHEC
16SP
CHEC
SPL
or
CHEC
SPH
CHEC
rSPt
Display is blank.
Instrument is not getting
power, or the supply volt-
age is too low.
Fail test appears upon
power up if the internal
diagnostics detect a fail-
ure. This message may
occur during operation if
a failure is detected.
Displays flash.
Fail test may also occur
due to an EEPROM error.
This message will
appear upon power up
if SP1, SP2, #SP1, or
SP is set outside of
##
the SPL or SPH values.
This message appears
at power up if
values are programmed
outside the input range
SPL or SPH
ends.
This message appears
if the analog remote
set point signal is out
of range.
Set point outputs
inactive.
Alarm inactive
Set point outputs
inactive.
Alarm inactive
Set point outputs
inactive.
Alarm active
Set point outputs
inactive.
Alarm active
Set point outputs
inactive.
Alarm active
ACTION REQUIRED
Check that the power
supply is on, measure
supply voltage, check
that the external fuses
are good.
The display alternates
between
default settings. Recheck
controller programming.
FA1L tESt and
one of the following
messages:
FACt dFLt: Memory
may be corrupted.
Restore to the factory
rEt FACt:
Unrecoverable error.
Return to service.
Correct the SP1, etc.
or adjust the SPL or
SPH values by
programming
new values.
Correct the SPL or SPH
values by
programming
new values.
The control will revert to
SP1. Correction of the
analog signal or turning
off the
rSPt clears the
error message.
CHEC
LorE
This message
appears if the
Serial Communications
has timed out.
www.GlobalTestSupply.com
Set point outputs
inactive.
Alarm active
Change the LorE to
L0C. Restore the
communications line
and switch
LorE back
rE.
to
Page 39
SPECIFICATIONS
Selectable Inputs: Thermocouple, RTD, DC Voltage, or DC Current
selectable.
Input Impedance:
Thermocouple = 3 megohms minimum. RTD current = 200 µA.
Current = 10 ohms. Voltage = 5000 ohms.
Sensor Break Protection: De-energizes control output to protect system
after customer set time. (See InPt in Secure Menu.)
Set Point Range: Selectable (See Input Ranges Page 43).
Display: Two 4 digit, 7 segment 0.3” high LEDs.
Control Action: Reverse (usually heating), Direct (usually cooling) selectable.
Proportional Band: 1 to 9999 °F, °C, or counts.
Reset Time (Integral): Off or 0.1 to 99.9 minutes.
Rate Time (Derivative): Off or 0.01 to 99.99 minutes.
Cycle Rate: 1 to 80 seconds.
On - Off Differential: Adjustable 1° F, 1° C, or 1 count to full scale in 1° F,
1° C, or 1 count steps.
Alarm On - Off Differential: 1° F, 1° C, or 1 count.
Fuzzy Percent: 0 to 100%.
Fuzzy Rate: Off or 0.01 to 99.99 counts per second.
Fuzzy Band: Off or 1 to 4000 °F, °C, or counts.
Accuracy: ±0.25% of span, ±1 least signifi cant digit.
Resolution: 1 degree or 0.1 degree, selectable.
Line Voltage Stability: ±0.05% over the supply voltage range.
Temperature Stability: 4µV/°C (2.3 µV/°F) typical, 8 µV/°C (4.5 µV°F)
maximum (100 ppm / °C typical, 200 ppm / °C maximum).
Common Mode Rejection: 140 db minimum at 60 Hz.
Normal Mode Rejection: 65 db typical, 60 db at 60 Hz.
Isolation:
Relay and SSR outputs: 1500 Vac to all other inputs and outputs.
SP1 and SP2 Current output: 500 Vac to all other inputs and outputs
but not isolated from each other.
SP1 and SP2 Switched Voltage output: 500 Vac to all other inputs
and outputs, but not isolated from each other.
Process Output (934, 936): 500 VAC to all other inputs and outputs.
Supply Voltage: 100 to 240 Vac, nominal, +10 -15%, 50 to 400 Hz. single
phase; 132 to 240 Vdc, nominal, +10 -20%.
Supply Voltage (Option 9502): 12 to 24 Vdc, Vac 40-400 Hz, ±20%.
Power Consumption: 5VA maximum.
Operating Temperature: -10 to +55 °C (+14 to 131 °F).
Storage Temperature: -40 to +80 °C (-40 to 176 °F).
Page 40
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Humidity Conditions: 0 to 90% up to 40°C non-condensing, 10 to 50% at 55°C
non-condensing.
Memory Backup: Nonvolatile memory. No batteries required.
Control Output Ratings:
SSR: 2.0 A combined outputs A & B @ 240 VAC at 25°C (77°F).
Derates to 1.0 A @ 55°C (130°F).
Relay: SPST, 3 A @ 240 VAC resistive; 1.5A @ 240 VAC inductive; Pilot
duty rating 240 VA, 2 A @ 120 VAC or 1 A 240 VAC.
Alarm Relay: SPST, 3 A @ 240 VAC resistive; 1/10 HP @ 120 VAC.
Current (isolated): 0 to 20 mA across 600 ohms maximum.
Switched Voltage (isolated): 15 VDC @ 20 mA.
DC SSR: 1.75 A @ 32 Vdc maximum.
Panel Cutout: 45 mm x 45 mm (1.775” x 1.775”).
Depth Behind Mounting Surface: 121.6 mm (4.79”) maximum.
Weight: 220 g (8 oz).
Agency Approvals: UL, C-UL E83725; CE.
Front Panel Rating: IP66, (UL Type 4X).
www.GlobalTestSupply.com
Page 41
-992 RS-485 Series Communications
Port Compliance: EIA-485.
Isolation: 500 VAC.
Protocol: Lovelinks™ II.
Address Range: 001H or 3FFH.
Baud Rates: 300, 1200, 2400, 4800, 9600, 19.2k, 28.8k, 57.6k,
Mode: Half duplex.
Character: 8 bits, 1 start, 1 stop, no parity.
Number of units on line/ports
1
Cable Lengths1: 6,000 ft (1,828 m).
Termination: 120 Ohms, balanced.
-993 RS-232 Series Communications
Port Compliance: RS-232C.
Isolation: 500 VAC.
Protocol: Lovelinks™ II.
Address Range: 001H or 3FFH.
Baud Rates: 300, 1200, 2400, 4800, 9600, 19.2k, 28.8k, 57.6k.
Mode: Half duplex.
Character: 8 bits, 1 start, 1 stop, no parity.
Number of units on line/ports: 1.
Cable Lengths1: 25 ft (7.6 m).
-995 RS-232 Series Communications
Port Compliance: RS-232C.
Isolation: 500 VAC.
Protocol: MODBUS®RTU.
Address Range: 001H or 0FFH.
Baud Rates: 300, 1200, 2400, 4800, 9600, 19.2k.
Mode: Half duplex.
Character: 8 bits, 1 start, 1 stop, no parity.
Number of units on line: 1.
Cable Lengths1: 25 ft (7.6 m).
-996 RS-485 Series Communications
Port Compliance: EIA-485.
Isolation: 500 VAC.
Protocol: MODBUS®RTU.
Address Range: 001H or 0FFH.
Baud Rates: 300, 1200, 2400, 4800, 9600, 19.2k.
Mode: Half duplex.
Character: 8 bits, 1 start, 1 stop, no parity.
Number of units on line/ports1: 32.
Cable Lengths1: 6,000 ft (1,828 m).
: 32.
Page 42
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Termination: 120 Ohms, balanced.
1
Number can be increased through use of a repeater such as the Mother
Node™. Consult factory for details.
INPUT RANGES
INPUT TYPE RANGE °F RANGE °C
Type J or L1Thermocouple -100 to +1607 -73 to +871
Type K1 Thermocouple -200 to +2500 -129 to +1371
Type T1 Thermocouple -350 to +750 -212 to +398
Type E1Thermocouple -100 to +1800 -73 to +982
Type R Thermocouple 0 to 3200 -17 to +1760
Type S Thermocouple 0 to 3200 -17 to +1760
Type B Thermocouple +75 to +3308 +24 to +1820
Type C Thermocouple 0 to 4208 -17 to +2320
Type N1Thermocouple -100 to +2372 -73 to +1300
100 Ω Plt. 0.00385 DIN1RTD -328 to 1607 -200 to +875
100 Ω Plt. 0.00392 NIST1RTD -328 to 1607 -200 to +875
120 Ω Nickel 0.00628 US1 RTD -112 to +608 -80 to +320
1000 Ω Plt. 0.00385 DIN1RTD -328 to +1607 -200 to +875
Current/Voltage/ΔVoltage
2
Scalable Units from -1999 to +9999
1
These Input Types can be set for 0.1°display. If temperature goes above
999.9°or less than -199.9°the display will return to whole degree resolution.
2
The 0 to 20 mADC, 4 to 20 mADC, 0 to 10 VDC, 2 to 10 VDC, and -10 to +10
mVDC inputs are fully scalable from a minimum of 100 counts span placed any
where within the within the range of -1999 to +9999. Decimal point position is
adjustable from the zero place (9999), tenths (999.9), hundredths (99.99), thousandths (9.999), or ten thousandths (.9999).
www.GlobalTestSupply.com
Page 43
©Copyright 2012 Dwyer Instruments, Inc. Printed in U.S.A. 1/12 FR# 949-1265 Rev. 9
LOVE CONTROLS DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A e-mail: love@love-controls.com
Phone: 219/879-8000
www.love-controls.com
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