2.Wire your control following the instructions on pages 5-11. If you are using a two-
wire transmitter as an input, see the drawing and instructions on page 7. Option
wiring instructions are on pages 8-11. Option descriptions and specific instructions
start on page 19.
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 31) before making changes to the Secondary Menu (page
24). If error messages occur, check the Error Messages on page 41-43 for help.
Take the example of a Model 26010 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 theUP ARROW & ENTER
keys for 5 Seconds. Press the INDEX key until the display shows I n P 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 U n i t . Press the DOWN ARROW until the
display shows C. Press ENTER.
Next, press the INDEX key until S P L is displayed (pass the dPt, I n P t , and S E n C
selections). Press the UP ARROW until the display shows 0. Press ENTER.
Finally, press INDEX key to display S P H . Press the DOWN ARROW until the
display shows 3 0 0 . 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 & ENTER keys (at the same time) and then press the DOWN
ARROW & 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
®
, Auto/Manual, or the Ramp/Soak Programmer features, see
the special sections on these items. Page numbers for these are in the Contents section
on the previous page.
May, 2013Page 3 of 52949-1194 Rev. 7
MODEL IDENTIFICATION
26
Options (blank if none)
Alarm
0 = No
1 = Yes
Output A
1 = SSR*
3 = Relay*
5 = Current
Output B
0 = None
1 = SSR*
3 = Relay*
5 = Current
* Note: Switched15 VDC output standard on Output 1 or Output 3.
Option Description
924 Analog Remote Set Point, 0 to 10 VDC, scalable.
926 Analog Remote Set Point, 0 to 20 mADC, scalable (may be programmed for 1 to
5mA, 4 to 20 mA, etc.).
928 Analog Remote Set Point, 0 to 10,000 ohms, scalable.
934 Analog Retransmission of Process Variable or Set Variable, 0 to 20 mAdc, scalable
(may be programmed for 1 to 5mA, 4 to 20 mA, etc.).
936 Analog Retransmission of Process Variable or Set Variable, 0 to 10 VDC, scalable.
948 4-Stage Set Point. One of four pre-set set point values can be implemented via
contact closure.
992 RS-485 Serial Communications, Lovelink™ protocol.
993 RS-232 Serial Communications, Lovelink™ protocol.
995 RS-232 Serial Communications, Modbus
996 RS-485 Serial Communications, Modbus
®
protocol.
®
protocol.
Lovelink™, Lovelink™II, and Mother Node™ are Trademarks of Love Controls.
MODBUS
®
is a trademark of Schneider Automation.
May, 2013Page 4 of 52949-1194 Rev. 7
INSTALLATION
92.0 mm
(3.620 in)
MOUNTING COLLAR
+0.8
-0.0
+0.032
-0.000
PANEL
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.
PANEL CUTOUT
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.
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 input always use extension leads of the same type designated
for your thermocouple.
May, 2013Page 5 of 52949-1194 Rev. 7
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 have a common disconnect and be
connected to the same pole of the disconnect.
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 rear of instrument showing wiring terminals).
Note: Illustrations shown inside the wiring terminals represent internal circuitry.
See next page for output wiring chart.
INPUT WIRING
Wire inputs as shown in the chart below.
Terminals 1 3 4 5
Thermocouple + RTD - 3 wire A B B
RTD - 2 wire A B & J J (Jumper 3 to 4)
Voltage + Current - +
Key: ‘+’ = positive; ‘-’ = negative; ‘A’ = ‘odd’ colored lead; ‘B’ = ‘common’ leads; ‘J’ = Jumper.
May, 2013Page 6 of 52949-1194 Rev. 7
OUTPUT WIRING
Wire outputs as shown in the chart below.
Terminals
SP1 SSR
SP1 15 VDC
SP1 Relay
SP1 Current
SP2 SSR
SP2 15 VDC
SP2 Relay
SP2 Current
Wire power and outputs 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 RESULT.
May, 2013Page 7 of 52949-1194 Rev. 7
WIRING FOR OPTIONAL INPUTS AND OUTPUTS
3
2
1
21
22
23
24
25
26
13
12
11
+
-
Option 924
Option 924: Input 0 to 10 VDC,
1 Megohm Impedance
3
2
1
21
22
23
24
25
26
13
12
11
+
-
Option 926
Option 926: Input 0 to 20 mADC,
10 Ohms Impedance
All wiring shown below is Class 2. Shielded twisted pair is required for Options 992 and
996. Shielded cable is required for Options 993 and 995. Options 924, 926, and 928
share a common ground with input.
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 RESULT.
WIRING FOR OPTION 924 REMOTE SET POINT
WIRING FOR OPTION 926 REMOTE SET POINT
May, 2013Page 8 of 52949-1194 Rev. 7
CAUTION: DO NOT RUN SIGNAL WIRING IN THE SAME CONDUIT OR
3
2
1
21
22
23
2
4
25
2
6
13
12
11
Option 928
Option 928: Input 0 to 10 kohms,
4µA Search Current
3
2
1
21
22
23
24
25
26
13
12
11
+
-
Option 934: Output 0 to 20 mADC,
into 600 Ohms maximum
3
2
1
21
22
23
24
25
26
13
12
11
+
-
Option 936: Output 0 to 10 VDC,
20 mADC maximum
CHASE AS THE POWER WIRING. ERRATIC OPERATION OR DAMAGE TO
THE CONTROL CIRCUITRY WILL RESULT.
WIRING FOR OPTION 928 REMOTE SET POINT
WIRING FOR OPTION 934 ANALOG RETRANSMISSION
WIRING FOR OPTION 936 ANALOG RETRANSMISSION
May, 2013Page 9 of 52949-1194 Rev. 7
CAUTION: DO NOT RUN SIGNAL WIRING IN THE SAME CONDUIT OR
5
4
3
2
1
21
22
23
24
25
26
15
14
13
12
11
Option 948
C A B
Switch Truth Table for Option 948
A to C B to C Active Set Point
open open 1SP1
closed open 2SP1
open closed 3SP1
closed closed 4SP1
2
1
21
22
23
24
25
26
12
11
C A B
Wiring for
Relay control
(Coil wiring
not shown)
Alternate
wiring for
Transistor
control.
Use NPN
open collector
transistors.
(Drive circuit
not shown)
CHASE AS THE POWER WIRING. ERRATIC OPERATION OR DAMAGE TO
THE CONTROL CIRCUITRY WILL RESULT.
WIRING FOR OPTION 948 4-STAGE SET POINT
SWITCH CONTACTS FOR OPTION 948 MUST BE ISOLATED AND CAN NOT
SHARE WIRING WITH OTHER CONTROLS.
TRANSISTOR DRIVE MUST BE ISOLATED AND MAY NOT SHARE A
COMMON GROUND WITH OTHER EQUIPMENT OR OTHER CONTROLS.
May, 2013Page 10 of 52949-1194 Rev. 7
CAUTION: DO NOT RUN SIGNAL WIRING IN THE SAME CONDUIT OR
10
9
8
7
27 28
29
30
31
32
20
1
9
1
8
1
7
*For half-duplex operation wire only A and B. Do not connect to Y and Z.
CHASE AS THE POWER WIRING. ERRATIC OPERATION OR DAMAGE TO
THE CONTROL CIRCUITRY WILL RESULT.
WIRING FOR OPTION 992, 993, 995, 996 SERIAL COMMUNICATIONS
May, 2013Page 11 of 52949-1194 Rev. 7
FRONT PANEL KEY FUNCTIONS
Heater Fail Lamp
Set Point 1 Lamp
Set Point 2 Lamp
Process Display
Set Point Display
Manual Indicator
Alarm 1 Lamp
Alarm 2 Lamp
°F Indicator
°C Indicator
Remote Set Lamp
Percent Lamp
The decimal point flashes when Self Tune is operating.
INDEX: Menu Navigation. Pressing the INDEX key advances the display 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: This key toggles the control output between Automatic mode and
Manual mode. Press and hold key for three seconds to activate. See section on
AUTO/MANUAL operation on page 18.
RUN/HOLD: 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 Ramp/Soak (page 15) for
further details.
UP ARROW & ENTER: Menu Access. Pressing these keys simultaneously
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 simultaneously and
holding them for 5 seconds forces a ‘warm boot’, restarting the control (similar to
turning power off and on). ‘Global Reset’ will allow recovery from errors and reset the
following menu items:
May, 2013Page 12 of 52949-1194 Rev. 7
A L i H : Alarm inhibitO P E n I n P : Input error message
b A d I n P : Input error message C H E C C A L : Check calibration error
Correct the problems associated with the above conditions before using these reset keys.
More than one error could be 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 the
HOME position displaying the temperature value. Outputs are disabled (turned off) when
the Secure Menu is active.
NOTE: To move to 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
(following) for the correct value to enter for the security level desired. The SE C r menu item
security level may be viewed or changed at any time regardless of the present security
level.
To set the access level to, for example, 2 , at the S E C r menu item press the UP
ARROW key until the upper display shows the password for level 2 access, 1 1 0 1 . 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 future reference. This is the only reference made to password values in this
instruction book.
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 functions 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 its
“control” for proper setting.
2. The “#” symbol is used in two ways. It is used inside a group of characters to indicate
which set point function (S P 1 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.
DISPLAY CONVENTIONS
The instrument front has two four digit displays, eleven indicators, and six keys. The
diagram on page 12 shows the location of the displays and descriptors.
During normal operation the top four digit display indicates the temperature that is being
read by the sensor. The bottom display indicates the set point. When you are
programming the instrument, the bottom display indicates the Menu Item being
programmed and the top display the value selected for that Menu Item. Error messages
use both the top and bottom displays to indicate a particular error.
Each character can only be displayed with seven light segments. Alphabet characters may
look peculiar when seen presented this way. The following is an example of the ‘seven
segment alphabet’ as used in the instrument:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A b CdEFGHIJKLmnOPQ rSt U V U XYZ
0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 567 8 9
Notice that some characters are in upper case while others are in lower case. Some look
the same (e.g. G [G] and 9 [9 ]) and must be interpreted by context. Others are close (e.g.
B [b ] and 6 [6 ]), but different. Usually, the context of the term or value will help you
determine the correct character.
May, 2013Page 14 of 52949-1194 Rev. 7
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 P r o 9 function, the Pct O function, and any error message. Description of
these special displays follows.
If the Auto/Manual key is pressed, the Manual indicator lights, the “%” 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 the
letter õ. Access to the SP 2 value is made by the INDEX key. See Auto/Manual
Operation on Page 17 for further information.
If P r o 9 is turned On, the HOME display changes the SV display from S P 1 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 P c t O (Secondary Menu) is turned On, the lower display changes to show the active
percentage of output as required to maintain S P 1 . The display is similar to the Auto/Manual
display above, except that the percent indicators (o ,õ ) do not flash, and the output is
displayed in whole percentages of output, not in tenths of a percent. If the control has both
S P 1 and SP2, the lower display will alternate between the S P 1 percent output and the SP2
percent output.
Error messages are listed on pages 41-43.
PROGRAMMING AND OPERATION FOR RAMP / SOAK FEATURE
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 2600 Series controls offer a very simple approach to programming a ramp. Rather
than requiring the operator to calculate an approach rate (usually in degrees per minute),
the 2600 does the calculation internally. Thus, the operator only needs 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.
May, 2013Page 15 of 52949-1194 Rev. 7
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 P r o 9 and make sure that Pro 9 is set to OFF.
INDEX to P S E t and turn On. Press ENTER.
Skip the S t A t setting (this is discussed later) and press INDEX to 1ti .
The following items repeat in the following order: 1 t i , 1 S P , 1 A 1 and/or 1A2 (if A L 1 or AL2 in
the Secure Menu are programmed set to E U n t ), 2 t i , 2 S P , 2 A 1 ,..., 1 6 t i , 1 6 S P , 1 6 A 1 , 1 6 A 2 . To
avoid repetition each item will only be described once.
Set 1 t i to the amount of time you want for the first ramp. This value is in time units
(determined by the t b A S menu item) from 0 to 99 9 9 . Press ENTER.
Set 1 S P to the target value desired for the first ramp. This value is in actual units just like
S P 1 . 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 (AL 1 = EUnt), then
1 A 1 will appear. If you wish the Alarm 1 contact to function for this segment, set 1A1 for On . If
not, set for O F F . Press ENTER. When 1 A 1 is set to O n , the Alarm 1 function will be
active for the entire period set in 1 t i above.
Complete setting the segment times (2 t i ... 16ti ), segment set points (2 S P ... 1 6 S P ), and
event alarms (2 A 1 ... 16A1 ) to O n or OFF.
For unneeded or unused segments set the segment times (2 t i ... 16ti ) to 0 , and set the
segment set points (2 S P ... 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.
May, 2013Page 16 of 52949-1194 Rev. 7
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