Omega Products CN78000 Installation Manual
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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
Program Setup and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
OPERATION AND PROGRAMMING OF OPTIONS . . . . . . . . . . . . . . . . . . . . . . .12
MENU SELECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
PRIMARY MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
SECONDARY MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
SECURE MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
ALARM TYPE AND ACTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
ERROR MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31-33
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Front Cover
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 22) before making changes to the Secondary
Menu (page 16). If error messages occur, check the Error Messages on page 31-33
for help.
Take the example of a Series CN78000 that comes from the factory pr ogrammed 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 & ENTER keys
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for 5 Seconds (see Page 22.) 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.
CN78
Alarm
0 = No
1 = Yes
Option Description
PV1* 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).
PV2* Analog Retransmission of Process Variable or Set Variable, 0 to 10 Vdc, scalable.
C4* RS-485 Serial Communications, Lovelink™ protocol.
C2* RS-232 Serial Communications, Lovelink™ protocol.
LV* 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 LV may be combined with other options.
Output A
1 = SSR
2 = 15 VDC
3 = Relay
5 = Current
Output B
0 = None
1 = SSR
3 = Relay
Options
Pv1 = 0-20 mA
PV2 = 0-10 VDC
C4 = RS485
C2 = RS232
LV = Low Voltage
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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
Output A
For AC SSR or relay type outputs
(Output Codes 1 or 3), 15 & 16, and 17
& 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 Option C4. Shielded cable is required for Option C2.
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)
C4 RS-485 Serial Communications
C2 RS-232 Serial Communications Data In Data Out Signal Ground
11 12 6 7 8
+ + B A
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.
. 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 simultaneous-
ly and holding them for 5 seconds forces a ‘warm boot’, restarting the
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control (similar to turning power off and on). ‘Global Reset’ will allow recovery from
errors and reset the following menu items:
AL iH: 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 functions shown in this book may or may not
appear on your control, depending on other menu item selections. At various
places in the menu 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.
3. Features that apply only to Options will be printed in Italics.
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