Dynisco ATC770-0-2-3, ATC770 Installation And Operation Manual
ATC770 Microprocessor-Based
Pressure/Process Controller
Installation and Operation Manual
P/N 974086
12/04 Rev. G
ECO # 29250
2
CONTENTS
Quick Start Instructions ................................................................................................................... 3
1. Introduction.............................................................................................................................. 8
2. Specifications ........................................................................................................................... 8
3. Unpacking.............................................................................................................................. 17
4. Mounting and Wiring ............................................................................................................. 18
5. Start Up Procedures................................................................................................................ 24
6. Configuration ......................................................................................................................... 31
7. Operation............................................................................................................................... 45
8. Instrument Calibration ............................................................................................................ 53
9. Error Codes............................................................................................................................. 57
10. Normative References............................................................................................................. 60
11. Parameter Group Menus ......................................................................................................... 61
12. PID Controller Definitions ...................................................................................................... 82
13. Repair..................................................................................................................................... 83
14. Warranty ................................................................................................................................ 83
ATC770 Microprocessor-Based Pressure/Process Controller 3
MODEL ATC770-0-2-3 QUICK START INSTRUCTIONS
1. MOUNTING
• Prepare panel cutout to dimensions shown below.
• Remove instrument from case by spreading locking tabs.
•Grasp the bezel and slide the instrument out of its case.
• Slide the rubber gasket over the case.
• Slide the instrument case into the cutout.
• Attach the panel mounting hardware tightening the threaded rod for a secure fit.
• Slide the instrument back into the case until an audible click is heard as each tab engages.
4
2. WIRING
• Connect the wires from transducer cable as shown in the terminal diagram.
• Connect final control device.
• Connect alarm(s) if applicable. Note that alarm defaults are High, Reverse Acting for alarms 2 &
3 - alarm 1 is low inhibited.
• Connect power to the appropriate terminals as shown.
3. SCALING
• Apply power to the instrument; Upper display will give a reading near zero.
•Lower display will read the manual output %.
• Press FUNC key until the Upper display reads NONE and lower display reads GROUP.
• If your transducer is not a 10,000-psi model, select Group 3 using the Up arro w, enter with
function key.
•Lower display reads PI.FSV (Full Scale Value), and the upper display reads 10,000. NOTE: If
your transducer is a 10,000-psi model skip next two steps. Scroll to GROUP and select 2.
• Using the Down arrow key set the appropriate Full Scale Value for your transducer.
• Enter using the FUNC key to scroll until GROUP legend appears again.
• Using Up arrow key, select GROUP 2. Enter with FUNC key.
•Follow instructions for Calibration and Operation in Step 4 of Quick Start
4. CALIBRATION AND OPERATION
•Lower display reads ZERO.C and upper display reads OFF. Be sure transducer is at operation
temperature and that no pressure is applied.
• Change upper display to ON by using the Up arrow key. Enter with the FUNC key. After a few
seconds, the lower display will show SPAN.C and upper display will show OFF.
• Change upper display to ON using Up arrow key. Enter with the FUNC key. In a few seconds
lower display shows SMART and upper display shows OFF. Calibration is complete.
• Using the FUNC key, scroll to the GROUP display. Enter 1 with the Up arrow, and enter with
the FUNC key. Instrument shows 0 on upper display and SP on lower display.
• Set Process Setpoint. Press Function twice.
• Set Alarm 1,2,3 thresholds (if applicable).
• Press FUNC twice. Lower display will read GROUP, and upper display will read none.
• Press FUNC key. Upper display will read 0 +/- 10 process pressure, lower display will read 0.
This is control output %.
• Be sure process is at operating temperature.
• Utilizing up and down keys, manipulate the output % until the upper display is reading at
approximately the setpoint.
• Press FUNC key until lower display reads GROUP. Select group 2.
• Press function key three times. Lower display reads SMART and upper display reads OFF.
• Using up arrow key, turn SMART function to on. Enter with FUNC key.
•SMART LED will flash and a countdown will begin as the controller arrives at initial P&I(D)
parameters.
ATC770 Microprocessor-Based Pressure/Process Controller 5
• Return to GROUP none and observe that the value in the upper display is the actual setpoint
you wish to control.
•When the SMART LED has stopped flashing, press and hold the A/M key for at least 5 seconds.
The manual LED will extinguish, and you will be automatic control mode.
• Again, return to GROUP 2 and select SMART. Turn the function on with the up arrow, and enter
with the FUNC. This will activate the Adaptive Tune algorithm, and will maintain the correct
P&I(D) parameters for the process. It will remain on until manually turned off. It will also come
on anytime the ATC770 is the automatic control mode.
• Return to Group none, and observe the process. The setpoint may be adjusted in GROUP 1
while the controller is in automatic mode.
•Operator may alternately display Output %, Set Point, Deviation, Peak Value, or RPM by
pressing the up arrow key.
The preceding Quick Start instructions are the basic settings required to install, wire, and get the
controller operating. Please refer to the complete installation and operation manual for additional
functions. Questions on your transducer will be addressed in the manual included with your
transducer.
6
INDEX
How to: See Section: Page
Wire the ATC770 4.1, 4.2 22, 23
Primary Input
Set the Primary Input Type 6.1.1, 6.1.3 31, 34
Set the Shunt Calibration 6.1.2 33
Set the Primary Input Full Scale Value 6.1.4 35
Set the Primary Input Failsafe Mode 6.1.7 36
Calibration of Primary Input
Calibrate the Primary Input to the instrument 7.1 45
With Internal Shunt 7.1.1, 7.1.2 46
With External Shunt 7.1.3 46
With Linear Input 7.1.5 47
Alarms
Set which Input the Alarms will Monitor 6.2.1 37
Set the Alarm Type (high, low, etc.) 6.2.2 37
Set the Reset Mode for Alarms 6.2.5 38
Set the Failsafe Mode for Alarms 6.2.6 38
Set the Alarm Value 6.2.7 39
Setting Control Ouput
Set the Control Output Voltage or Current 6.4.1 41
Set the Control Output Direct/Reverse 6.4.2 43
Retransmission Output
Set the Retransmission Output Voltage or Current 6.3 39
SMART Tuning of Control Output
Set the Process Set Point 7.2.1 48
Engage SMART Tuning 7.2.2 48
Engage Adaptive Tuning (In Manual Mode) 7.3.2 49
Engage Adaptive Tuning (In Automatic Mode) 7.3.4 50
Security
Set the Security Codes 6.5 44
Error Codes
Interpreting the Error Codes and Troubleshooting 9.0 57
ATC770 Microprocessor-Based Pressure/Process Controller 7
Instrument Maintenance and Repair
Instrument Maintenance 9.3 59
Repair the Instrument 13 83
Get T ec hnical Assistance 13 83
8
1. INTRODUCTION
The ATC770 Pressure/Process Controller is a microprocessor-based instrument, with the capability of
controlling an extruder or other process using an advanced proprietary SMART self-tuning
algorithm. The input is user configurable to be 350⏲ Strain Gage, high-level voltage or high level
current. The voltage or current inputs are compatible with many process transmitter combinations.
Input and output groups are selected via internal jumpers, with the appropriate range selected via
the keypad. Thus the need to make numerous selections within the instrument is minimized. In
addition to this flexibility, 24 VDC transmitter power supply is a standard feature of the ATC770.
Three fully programmable alarms and an analog retransmission output are also included as part of
the standard ATC770 package.
Five groups of configuration parameters are available from the keyboard, and are protected by three
levels of user definable software locks. (A sixth group of read-only parameters can also be viewed)
In the programming mode the lower display will show the parameter being displayed, and the upper
display will show its value. In the operating mode, the upper display will show the process variable,
and the lower display offers the choice of displaying setpoint, deviation from setpoint, output %,
RPM or peak. In addition, a red LED bargraph presents an analog representation of the main input,
as well as indication of the alarm setpoints.
WARNING NOTE: The user should be aware that if this equipment is used in a manner not
consistent with the specifications and instructions in this manual, the protection provided by the
equipment might be impaired.
1.1 PRODUCT CODES
Model Second Input Options Power
Code Description Code Description Code Voltage
0 Not Present 2 Auxiliary Power supply 3 100-240 VAC
ATC770 & retransmission output (switching)
1 Analog, remote 3 RS-485 and 4 digital inputs 5 24 VAC/VDC
setpoint (switching)
2. SPECIFICATIONS
2.0 MECHANICAL SPECIFICATIONS
Case: Polycarbonate Black color Self-extinguishing degree VO according to UL 94
Front Panel: Designed and tested for IP65 and NEMA 4X for indoor location
Installation: Panel mounting
ATC770 Microprocessor-Based Pressure/Process Controller 9
Rear T erminal Block: 34 screw terminals with rear safety cover
2.1 MAIN POWER SUPPLY & ENVIRONMENTAL SPECIFICATION
Main Power Supply: From 100 to 240 VAC (-15% to 10%), 50/60 Hz switching. Option: 24 V AC/DC
(-10% to 10%)
Power Consumption: Max 22 VA at 50 Hz; Max 27 VA at 60 Hz
Insulation Resistance: 100 Mohm @500 VDC
Dielectric Strength: 1500 V rms for 1 min, 1800 V for 1 sec (according to EN6 1010-1)
Ambient T emperature: From 0 to 50°C
Storage T emperatur e: From -20 to 70°C
Humidity: Max 85% RH non-condensing
Watchdog: Hw/Sw is provided for automatic restart
Protection: Two internal dip switches for factory calibration and security codes protection
Agency Appro vals: UL File # 193253, cUL pending
Self-Certification: CE
Electromagnetic Compatibility and Safety Requirements: The instrument is marked CE. Therefore, it
conforms to council directives 89/336/EEC (reference harmonized standard EN50081-2 and
EN50082-2) and to council directives 73/23/EEC and 93/68/ EEC (reference harmonized standard
EN61010-1).
Installation Category: II
2.2 DISPLAY SPECIFICATION
Display: LED technology, custom type.
Upper Digits: Red color, 5 numeric digits, 7 segments with decimal point 13.2 mm high.
Lower Digits: Green color, 5 alphanumeric digits (British flag), 14 segments with decimal points,
12.7 mm high.
Bar Graph: Red color, 35 segment with 3% resolution. Displays continuous bar graph to indicate the
measured variable of the main input (0-100% full scale). Alarm set point values displayed. Last
10
segment blinks for pressure greater than full scale value.
Indicators:
9 red LED’s annunciator for:
A1 Lit when alarm 1 is in Alarm State
A2 Lit when alarm 2 is in Alarm State
A3 Lit when alarm 3 is in Alarm State
SMRT Flashing when the first step of SMART algorithm is activated
Lit when the second step of SMART algorithm is activated
MAN Lit when device is in manual mode
RSP Lit when Remote Set Point is selected
REM Lit when device is controlled by serial link.
The LED’s:
0 25 50 75
and
100 %
are always on to improve the bar-graph indication.
5 green LED annunciators for:
SP Lit when lower display shows the Set Point
DEV Lit when lower display shows the deviation (Measured Variable minus Set Point
OUT% Lit when lower display shows the Output Value (absolute value with 0.1% resolution)
RPM Lit when lower display shows the Output Value scaled to RPM
PEAK Lit when lower display shows the peak value
2.3 MAIN INPUT SPECIFICATION
Main Input: Selectable between strain gage and linear by jumper and configuration.
Strain Gage Input: 350 Ohm, 2-4 mV/V. Excitation 10 VDC ±7%. 6 wire connection.
Linear Input: Selectable between 0-5 VDC, 0-10 VDC, 0-20 mA, 4-20 mA.
Input Signal: -25/125% of full scale (approximately -10 / 50mV).
Shunt Calibration: With or without shunt resistor (value programmable from 40.0 to 100.0%).
Zero Balance: ±25% of full scale (approximately ± 10 mV).
Auxiliary Power Supply: 24 VDC / 1.5W ± 2% power supply for two or four wire transmitter.
Input Impedance:
<10 Ohm for linear current input
>165 Kohm for linear voltage input
Input Protection: Open circuit detection for strain gage (on signal and excitation wires) and 4-20
mA inputs; it is not available for 0-5 VDC, 0-10 VDC and 0-20 mA. Up or down scale keyboard
programmable.
ATC770 Microprocessor-Based Pressure/Process Controller 11
Sampling time: 50 ms typical.
Display Update Time: 400 ms.
Engineering Units: Peel-off labels.
Calibration Mode: Field calibrations (zero and span) are applicable for both strain gage and linear
input. Moreover it is possible to delete the field calibration done by the end user and to restore
original factory calibration values.
Input Resolution: 4000 Counts
Full scale value Resolution
10 / 4000 1 digit
4002 / 8000 2 digits
8005 / 20000 5 digits
20010 / 40000 10 digits
40020 / 80000 20 digits
80050 / 99950 50 digits
Decimal Point: Settable in any position of the display.
2.4 REMOTE SET POINT INPUT SPECIFICATION
Remote Set Point Input: Selectable between the ranges 0-10 VDC, 0-20 mA, or 4-20 mA by jumper
and instrument configuration.
Input Protection: open circuit for 4-20 mA input (excluded for 0-10 VDC and 0-20 mA inputs). Up
or down scale keyboard programmable.
NOTE: This input is not isolated from the main input. A double or reinforced insulation between
instrument output and power supply must be guaranteed by the external device.
Input Impedance:
<10 Ohm for linear current input
>165 Kohm
Sampling T ime: 1000 ms.
Display update: At each sample.
Input Resolution with Linear Input: 4000 counts.
Low/High Scale Values: Set from 0 to pressure input full scale value with the same resolution and
decimal point position as Pressure unit.
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2.5 PRESSURE & REMOTE SET POINT INPUTS COMMON SPECIFICATION
Common Mode Rejection Ratio: 120 dB @50/60 Hz
Normal Mode Rejection Ratio: 60 dB @ 50/60 Hz
Reference Accurac y: ± 0.2% of full scale value ± 1 digit @ 25 ± 10°C and nominal power voltage.
Operative accuracy - temperature drift:
<300 ppm/°C of full span for current, voltage and strain gage input
2.6 DIGITAL INPUT SPECIFICATION
Digital Input: One input from contact closure (voltage free). It may be keyboard programmable for
the following functions:
• alarm reset
• peak reset
• alarm and peak reset
NOTE: This input is not isolated from main input. A double or reinforced insulation between
instrument output and power supply must be guaranteed by the external device.
Opto-isolated Digital Input: Four optional digital inputs are provided for control purposes. The
interface circuit is opto-isolated with respect to the CPU and analog inputs.
DIG1: This contact acts as an automatic / manual switch, if it is enabled by the proper parameter
(closed means manual mode, open means automatic mode).
DIG2: Control output value increase.
DIG3: Control output value decrease.
These three contacts are used to increase / decrease the output value with a linear, not exponential,
rate of change (about 20 seconds for a full scale variation from 0 to 100%).
NOTE: Use for manual mode only. Not used for set point adjust.
DIG4: This contact is used to switch the controller from automatic to manual mode setting to zero
the control output. When this logic input is closed the transfer from manual to automatic mode by
the front panel is inhibited while the user may modify the control output. To return to automatic
mode the logic input should be de-activated.
2.7 ALARMS SPECIFICATION
ATC770 Microprocessor-Based Pressure/Process Controller 13
Alarm Outputs: 3 standard alarms (AL1, AL2 and AL3).
AL1 and AL2 Contacts: 1 SPDT 2 A max @ 240 VAC resistive load.
AL3 Contacts: 1 SPST solder jumper selectable NO/NC 2 A max @ 240 VAC resistive load.
Contact Protection: Varistor for spike protection.
Alarm T ype: Each alarm is keyboard programmable for:
• Process / Deviation / Band
• High / Low / Low inhibited on start up
•Auto / Manual reset
Alarm Mask: The alarm mask may be restored using the keyboard parameter
(AL.MSK)
. Moreover
the alarm mask of deviation and band alarms is restored at set point change and during set point
ramp.
Excitation T ype: Keyboard configurable for each alarm: relay coil energized in no alarm condition
(failsafe) or relay coil energized in alarm condition (non-failsafe). The default condition is failsafe.
Threshold: From 0 to 110% Full Scale (the threshold may be limited due to the selected full scale
value).
Hysteresis: Keyboard programmable for each alarm; from 0.1% to 10.0% of span or 1 Least
Significant Digit (whichever is greater) for each alarm.
Alarm Filter: Selectable from the following values: OFF, 0.4 s, 1 s, 2 5. 3 s. 4 s, 5 s.
Alarm Update Time: At every input conversion.
2.8 OPTIONAL SERIAL COMMUNICATION INTERFACE SPECIFICATION
Serial Interface: RS-485 type. Opto-isolated.
Protocol T ype: Modbus/Jbus (RTU mode).
Type of Parameters: Run-time and configuration are available by serial link.
Device Address: From 1 to 255
NOTE: The physical interface can only support up to 31 devices for each segment. Use multiple
segments for more than 31 devices.
Baud Rate: 600 up to 19200 baud.
14
Format: 1 start bit, 8 bits with or without parity, 1 stop bit
Parity: Even/Odd.
2.9 CONTROL OUTPUT SPECIFICATION
Control Output: Opto-isolated from CPU input and output circuits.
Type of Analog Output: Jumper and keyboard selectable between:
•+ 0/10 VDC min. load 5 K⏲
•- 10/+10 VDC mm. load 5 K⏲
•+ 0 / 5 VDC mm. load 5 K⏲
•+ 0/20 mA max. load 500⏲
•- 4/20 mA max. load 500⏲
Resolution: 0.1% in manual mode, 0.03% in automatic mode.
Scaling: The output control value may be displayed in two modes:
• from 0.0 to 100.0% (0.1% resolution)
• from a low to a high limit selection from - 10000 to 10000
2.10 RETRANSMISSION OUTPUT SPECIFICATION
Retransmission Output: Opto-isolated from CPU input and output circuits.
Type of Analog Output: Jumper and keyboard selectable between:
•+ 0/10 VDC min. load 5 K⏲, with under / overrange capability from -2.5 to 12.5 V.
• ± 10 VDC min. load 5 K⏲, with under / overrange capability from -12.25 to 12.5 V.
•+ 0/5 VDC min. load 5 K⏲, with under / overrange capability from -1.25 to 6.25 V.
•+ 0/20 mA max. load 500⏲, with under / overrange capability from 0 to 24 mA (max. load 400
Ohm over 20 mA).
•+ 4/20 mA max. load 500⏲, with under / overrange capability from 0 to 24 mA (max. load 400
Ohm over 20 mA).
Resolution: 0.1% of output mode
Scaling: The retransmission low and high limits are selectable from 0 to full scale input value. The
two scaling values may be freely selectable within the above range. This allows for a direct or
reverse output type.
Output Filter: Selectable from the following values: OFF, 0.4 s, 1 s, 2 5. 3 s. 4 s, 5 s.
ATC770 Microprocessor-Based Pressure/Process Controller 15
2.11 CONTROL AND RETRANSMISSION OUTPUTS COMMON SPECIFICATION
Reference Accurac y: ±0.1% of output span @ 25 ± 10°C and nominal line voltage.
Linearity Error: <0.1% of output span.
Output Noise: <0.1% of output span.
2.12 CONTROL ALGORITHM SPECIFICATION
Control Type: PID plus Integral Preload plus Anti-Reset Windup
Output Value Indication: Selectable between the following Modes:
• Range 0 / 100.0%
• Selectable with two calibrated values for RPM indication
• In automatic mode either mode is available
• In manual mode, a parameter is provided to select the first or second method of indication.
SMART Algorithm: The SMART procedure is activated by setting the SMART Parameter to ON. In
manual mode the controller will start the TUNE algorithm (SMRT led flashes), while in automatic
mode it will enable the ADAPTIVE function (SMRT led lights steady).
The SMART can select two types of procedures:
1. The TUNE algorithm
2. The Adapti ve algorithm
1. TUNE ALGORITHM
To implement the TUNE algorithm, set the instrument in manual mode and the select SMART ON.
SMART will switch to OFF after the PID parameters (PB, TI, TD) are calculated (during this
procedure the LED will be flashing). The basic concepts of the auto-tuning system are based on the
open loop step response, for this reason the TUNE function may be activated only in the manual
mode.
The equivalent mathematical model of the process is characterized by three parameters: the gain,
the time constant and the equivalent time delay. The power output of the controller is changed by a
small step value. Then, the controller stores the process variable response. From the transient
response, the controller estimates the three basic process parameters by means of the area’s method.
It applies these parameters, and re-runs the step process. When this is done, it calculates the final
PID parameters.
The step response is a convenient way to characterize this type of process dynamics because its
model is based on the alteration of the behavior of the process and very accurately determining the
16
response. It is capable of estimating the process parameters with high precision.
2. ADAPTIVE ALGORITHM
In order to implement the adaptive algorithm, the instrument should be in automatic mode. Then
change SMART to ON. In this case the ON will be remembered by the instrument even if the
instrument was switched off.
In order to deactivate the adapti ve processes, return the SMART parameter to OFF.
The ADAPTIVE is an on-line algorithm that “observes” the measured value and looks for oscillation
due to a variation of the load or the set point. When a significant pattern is “recognized,” the
decision procedure starts to recalculate the PID parameters of the controller. While the ADAPTIVE
procedure is enabled the PID parameters can only be monitored.
AUTOMATIC STAND-BY: This function avoids overshoot due to temporary process interruptions (PV
goes to zero).
In cases where the main input goes to zero, the controller output quickly reaches the saturation for
integral factor effect; when the process restarts, the controlled output will have an excessive and
dangerous overshoot, (i.e. it will start at full speed).
When the Automatic Stand-By function is activ ated, the algorithm monitors the controller input and
output: when the input value goes lower than a threshold (specified by the Automatic Stand-By
Pressure Low Limit parameter). When this happens, and the output value reaches the saturation
condition and the control output saves the last value stored when the process was stable.
This freezing of the output of the controller will last for the time specified by the Automatic Stand-By
Recover y Time parameter. If the input does not recover within the specified time, the output value is
forced to zero. If the controller input recovers within the specified time, the algorithm waits for two
and one half times the integral value; after this time has elapsed, the controller will come back
automatically to normal running condition to the output level calculated when the process was
stable.
2.13 CONTROL AND RETRANSMISSION OUTPUTS COMMON SPECIFICATION
The ATC770 Pressure/Process controller has four digital inputs that can switch between Manual and
Automatic control (DIG1), increase (DIG2) or decrease (DIG3) the control output value and switch
from Automatic to Manual while setting the control output to zero (DIG4).
Digital Input 1 (DIG1) is available at all times. It acts as an Auto/Manual Switch. In the closed
position the Manual mode is accessed. In the open position the Automatic mode is
accessed.
Digital Input 2 (DIG2) is available only when the Group 1 function
A/M
is changed from
LoCAL
to
ATC770 Microprocessor-Based Pressure/Process Controller 17
CnCt
. It will increase the set point in a linear fashion (about 20 seconds from 0 to
100% output).
Digital Input 3 (DIG3) is available only when the Group 1 function
A/M
is changed from
LoCAL
to
CnCt
. It will decrease the set point in a linear fashion (about 20 seconds from
100% to 0 output).
Digital Input 4 (DIG4) is available at all times. It switches the controller from Automatic to Manual
and sets the control output to zero. It also inhibits keyboard control of switching
from Automatic to Manual, but allows keyboard increase of the output value.
NOTE: A dry contact switch or relay must be fitted between terminal 62 (Common) and terminal 63
(Digital Input 1 Remote AUTO/MAN) to enable the use of Digital Input 2 (DIG2) and Digital
Input 3 (DIG3) (Control output value increase and decrease).
3.0 UNPACKING
Upon receipt, examine the package for shipping damage. Notify the carrier immediately in the event
of any evidence of damage, and retain the shipping materials for their inspection. The package
should contain the instrument, two panel mounting brackets, a sheet of peel-off labels with a variety
of engineering units and an
Installation and Operation Manual
.
3.1 DIMENSIONAL INFORMATION
Dimensions: 3.78" X 3.78" X 6.01" overall (96mm X 96mm X 143.5mm)
Cutout: 3.62" X 3.62" (92mm X 92mm)
Depth behind panel: 5.04" (128mm)
Weight: 1.43 lbs. (650g)
18
3.2 ATC770 BLOCK DIAGRAM
Fig. 1 ATC770 Electronics Layout Block Diagram
NOTE: Dashed Line represents insulation boundary.
4. MOUNTING AND WIRING
Please refer to Figure 2 for cutout dimensions and clearance requirements. Locate the two mounting
brackets packed with the instrument and have them available.
1. Remove instrument from case. To accomplish this, spread the two locking tabs located on either
side of the case . The instrument will move forward past the locked position. Grasp the bezel
and slide the instrument from the case. Depending on the options chosen, you may find that
one or two boards appear to be loosely mounted. This patent-pending design allows the
instrument to be removed from the case without having to overcome the friction of all terminals
on all boards at one time. Initially the CPU board and alarm board will be released, followed by
the I/O and digital communication boards.
ATC770 Microprocessor-Based Pressure/Process Controller 19
Fig. 2 ATC770 Outline Drawing
20
2. Slide the instrument case into the cutout, being sure that it is right-side-up (terminal 1 at the
top). Attach the panel mounting hardware at diagonally opposite sides of the top and bottom of
the case, tightening the threaded rod until the case is secure against the panel.
3. Carefully slide the instrument back into its case, until the locking tabs have engaged. An audible
click will be heard as each tab engages.
4. Refer to the model number to determine the hardware and options included as part of your unit.
Please refer to Section 4.1 for the terminal assignments. Terminals are accessed by opening the
terminal covers from the side with the “OPEN” legend.
NOTE 1:
The ATC770 is equipped with screw terminals, and no connectors are necessary when wiring the
unit
NOTE 2:
When wiring the alarms, wire to the Common and NO (normally open) terminals to maintain a failsafe configuration. Remember to configure the software for failsafe operation.
Fail-safe denotes a situation where the alarms relay coils are activated in a no-alarm situation. As the
relay coil is energized, terminals that are normally open are closed and can cause completion of a
circuit when used as an interlock. Should the alarm threshold be exceeded, OR should power be
lost to the instrument the contacts will open, and the circuit will be broken. If the alarm is a latching
alarm, it will require an external reset signal to be activated again.
If the alarm is used to provide a contact to an alarm device (light, buzzer, etc.), when the threshold
is exceeded, wiring should be to the Common and NC (normally closed) terminals. Activation of the
relay coil will cause the contacts to open in a non-alarm situation, and on alarm, or if power is
interrupted to the instrument. If the alarm is a latching alarm, it will require an external reset signal
to be activated again.
NOTE 3: Relay outputs
The contact rating of all outputs is equal to 2A/240 VAC on resistive load.
•To avoid electrical shock, connect power line at the end of the wiring procedure.
•For power connections use No 16 AWG or larger wires rated for at least 75°C.
• Use copper conductors only.
NOTE 4: Power line
Before connecting the instrument to the power line, make sure that the line voltage corresponds to
the description on the identification label.
•To avoid electrical shock, connect power line at the end of the wiring procedure.
•For supply connections use No. 16 AWG or larger wires rated for at least 75°C
• Use copper conductors only
ATC770 Microprocessor-Based Pressure/Process Controller 21
• Don’t run input wires together with power cables
•For 24 V DC the polarity need not be observed.
The power supply input is fuse protected by a sub miniature fuse rated T, 1A, 250V.
When the fuse is damaged, it is advisable to verify the power supply circuit. It may be necessary to
send back the instrument to Dynisco for service.
The safety requirements for Permanently Connected Equipment say:
•a switch or circuit-breaker shall be included In the building installation;
• it shall be in close proximity to the equipment and within easy reach of the operator
• it shall be marked as the disconnecting device for the equipment
NOTE 5:
A single switch or circuit breaker can drive more than one Instrument.
•When a neutral line is present, please connect it to terminal 54.
• Protective conductor terminals shall be connected to earth.
Fig. 3 ATC770 Wiring - 4-20 mA Transmitter Internal 24 VDC Power Supply
22
4.1 TERMINAL ASSIGNMENTS
3. Linear - Remote Setpoint Input
4. Linear +
12. Strain Gage Signal + or Linear +
13. Strain Gage Signal - or Linear -
14. Calibration 2 Primary Input
16. Excitation +
17. Excitation -, Calibration 1
21. Main Output mA/V +
22. Main Output mA/V -
23. Remote Reset
24. Remote Reset
45. Alarm 1. NO
46. Alarm 1, Common
47. Alarm 1. NC
48. Alarm 2, NO
49. Alarm 2. Common
50. Alarm 2, NC
51. Alarm 3, Common OPTIONAL
52. Alarm 3. NC/NO
53. 100-240 VAC OR 24 VAC OR 24 VDC (Polarity need not be observed)
54. Line Neutral Line Neutral 24 VDC
55. Protective Ground Protective Ground
56. Retransmission Output, mA/V +
57. Retransmission Output. mA/V -
OPTIONAL
58. 24 VDC Auxiliary Power Supply +
59. 24 VDC Auxiliary Power Supply -
60. RS-485: A/A’
61. RS-485: B/B’ OPTIONAL
62. RS-485: DIG In Common
63. DIG 1
64. DIG 2
OPTIONAL
65. DIG 3
66. DIG 4
24
5. START-UP PROCEDURE
5.1 CONFIGURATION
The ATC770 is shipped with the hardware jumpers set for the following:
1. Main Input (Pressure) - Strain Gage
2. Main Output - V oltage
3. Secondary Output - Voltage
In addition, the DIP switches controlling the software security lock codes are in the “OFF” positions.
Please ensure that the correct jumper settings for the input(s) and output(s) used in your particular
application are selected. It is necessary only to select the category (e.g. Voltage or Current). The
specific range will be chosen in the software menu.
On special order the ATC770 can be powered from a 24 VAC or VDC supply (not to be confused
with the on-board 24 volt power supply used to power transmitters). If operating with a 24-volt
power supply, connect to terminals 53 and 54 as normal.
5.2 PARAMETERS
The ATC770 parameters are grouped in five sections guarded by three security levels. The more
common parameters are in the first groups, with the higher Group numbers for those parameters an
operator would not normally modify. Each group can be reset to its default value by two keystrokes.
This also resets the parameters of any lower numbered group to default. If GROUP 5 is set to default,
the entire instrument is reset to its default parameters. If a unit does not have a particular option, its
parameters will not appear. For example, an instrument that does not have RS-485 communications
will skip those parameters related to communications. Likewise, if a particular function is turned off,
its other parameters will not appear. For example, if Alarm 2 link
(A2.lNK)
is turned to
OFF
in Group
3, the hysteresis, reset, filter, type, and threshold functions will not appear on screen. Nor will the
alarm appear on the bar graph display.
5.2.1 GETTING READY
Apply power to the cabinet and allow the system to stabilize for about 30 minutes. When the
instrument is turned on, it will go through a self-test during which the front panel will illuminate.
The instrument will then be in the normal display mode showing the value of the main input on the
upper display, usually near zero, and the Output % on the lower display, usually 0.0%. In the event
that no input device is connected, or if the transducer is amplified, the upper display will show
OPEn
, and the bar graph display will be at 100% with the last segment flashing. Turn the power to
the instrument off and connect an input device to the appropriate terminals. Upon turning the
instrument back on, the displays should have a numeric value, close to zero pressure on the
pressure display. Depressing FUNC will go automatically into the GROUP 1 parameters.
ATC770 Microprocessor-Based Pressure/Process Controller 25
Successively pressing FUNC will scroll through all the parameters of GROUP 1. The last two
parameters of each group allow the default parameters to be restored, and returns to
GROUP
. If
nonE
is chosen in the group access function, the instrument will return to normal operating mode
after pressing of the FUNC key.
5.2.2 KEYBOARD DESCRIPTION
The keyboard is composed of four push buttons, covered by a silicone protective operator, labeled
▼, ▲, FUNC and A/M.
These keys must be pressed and released to move about in the configure screens. Do not press and
hold a key unless told to do so; simply press the key and release it to advance to the next screen.
The arrow keys ▼ or ▲ may be held down to advance rapidly through the values.
The ▼ is called the “Down Arrow Key”, and is used to decrement or modify the parameter value. In
manual mode it is used to decrement the output value. When pressed for more than 3 seconds in
automatic mode, it used to access and decrease the set point parameter
The ▲ is called the “Up Arrow Key”, and is used to increment or modify the parameter value. In
manual mode it is used to increment the output value. When pressed for more than 3 seconds in
automatic mode, it is used to access and decrease the set point parameter. When pressed for less
than 3 seconds in automatic mode, it used to switch the lower display from set point value,
deviation value, output value (%), output value (RPM) and peak value if enabled.
The FUNC (“function”) key is used to access the parameter to view and acts as an “Enter key” when
a value has been modified.
The A/M key is used to switch the controller from automatic to manual mode (and back again)
when depressed for more than 1 second. When monitoring / modifying control parameters, it is used
to return to the normal display mode without storing the parameter changes.
Pressing ▼ and FUNC together may be used to reset the stored peak value and to reset the alarms.
This function is disabled when the device is controlled by serial link.
Pressing ▼ and A/M together, or the ▲ and A/M may be used to jump to maximum or minimum
parameter values when the instrument is in function mode.
Pressing ▲ and ▼ together, or FUNC and A/M together, may be used on power-up when the
instrument detects a parameter error; the upper display shows
Err
and the lower display shows the
parameter name.
If the wrong parameter is a run-time parameter (i.e. from SP to
RO.TYP
), pressing the ▲ and ▼ push-
buttons will have the instrument load the default parameters for all groups of parameters.
NOTE: All of the actions explained above that require two or more keystrokes must follow the
button pushing sequence exactly.
26
5.2.3 OPERATING MODE DESCRIPTION
The FUNC key is used to access the parameters organized in five groups. Use the FUNC
pushbutton to access the Group 1 parameters; the last entry (showing
Group
and
nonE
) is intended
to access the other groups of parameters, or pressing FUNC again returns to the normal display
mode. Each group has its own family of parameters, loosely grouped around the decreasing need to
change the parameters. Each group (except Group 9) also has the ability to load its own default
parameters and the default values of the lower number groups.
To reset a specific group (and lower numbered groups) to the default factory settings, press the
FUNC key until
nonE
and
GROUP
show on the display. Press the ▲ key until the appropriate group
number appears in the upper display. Press the FUNC key to enter the appropriate group. Press the
FUNC key until
DEFLT
shows on the lower display and
OFF
shows on the upper display. Press the
▼ or ▲ key until
ON #
(where # is the Group number). Press the FUNC key to load the factory
parameters for that group (and lower numbered groups; for example selecting Group 5 resets groups
1, 2, 3, 4 and 5).
5.3 SETTING THE INSTRUMENT’S BASIC CONFIGURATION
The example below shows those parameters by group, which will permit an ATC770 to control a
motor. A modification of any other of the default parameters is not needed. Please note in the Value
column, the final values used in your process for future set-up use.
Fig. 4 Basic Parameter Table
Group # Function Mnemonic Choices Default Value
Group 5 Primary Input Selection PI.TYP Str, 0-20, 4-20, 0-5, 0-10 Str
Group 5 Control Output Selection CO.TYP 0-20, 4-20, 0-5 0-10, -10-10 0-10
Group 4 Shunt Calibration SHUNT OFF,On On
Group 4 Shunt Value SHNT% 40.0 TO 100.0% 80.0%
Group 4 Line Frequency LINE.F 50, 60 50
Group 3 Input Full Scale Value PI.FSV 10 TO 99.950 10000
Group 3 Input Low Scale Value PI.LSV ±25% OF FSV 0
Group 3 Input Decimal Point Position PI.DP None, 1,2,3,4 places None
Group 3 Secondary Input T/C Type Sl.TC tc J, tc CA, tc L, tc n tc J
Group 2 Zero Calibration ZERO.C OFF, On, CLEAr OFF
Group 2 Span Calibration SPAN.C OFF, On, CLEAr OFF
Group 2 Type of Automatic Tuning AT.TYP PID, PI PI
Group 2 Self-Tuning SMART OFF, On On
Group 1 Setpoint SP SP.LO to SP.HI SP.LO
5.3.1 SETTING THE SHUNT CALIBRATION:
For transducers and transmitters with a shunt calibration function (internal or external), the various
ATC770 Microprocessor-Based Pressure/Process Controller 27
values must be set and the shunt capability enabled. The Shunt Calibration value is a percentage of
the full scale transducer range. If the Shunt Value is supplied as a pressure, it must be converted to
percent.
To enter the Shunt Calibration value, the shunt should first be enabled by pressing the FUNC key
until
nonE
and
GROUP
show on the display. Press the ▲ key until 4 shows in the upper display.
Press the FUNC key until the lower displa y shows
SHUNT
. Press the ▼ or ▲ key until the upper
display shows the ON. Press the FUNC key to set the value and move to the next parameter, Shunt
%
(SHNT.%)
. Press the ▼ or ▲ key until the upper display shows the appropriate percentage for the
shunt value (normally 80%). Once the percentage value is set, press the FUNC key to set the value
and press the A/M key to go back to the active display.
5.3.2 SETTING THE LOGIC INPUT CONFIGURATION (IF SUPPLIED):
If the unit does not have the logic input option, skip to Section 5.3.4.
NOTE: Alarm and peak reset is only available when A/M in Group 1 is set to Local.
The Logic Input can be off, can be set to function as an alarm reset, a peak reset, or it can reset both.
To verify this parameter or to change it, press the FUNC key until
nonE
and
GROUP
show on the
display. Press the ▲ key until 4 shows in the upper display. Press the FUNC key until the lower
display shows
LI.TYP
. Press the ▼ or ▲ key until the upper display shows the correct selection:
OFF
,
AL
- alarms reset, P - Peak reset or
AL-P
). Press the FUNC key to set the value and move to the next
parameter, or press the A/M key to go back to the active display.
5.3.3 SETTING THE LOGIC INPUT STATUS (IF SUPPLIED)
The Logic Input Status can be set to Open or Closed as the active state. To verify this parameter or to
change it, press the FUNC key until
nonE
and
GROUP
show on the display. Press the ▲ key until
4
shows in the upper display. Press the FUNC key until the lower display shows
LI.STS
. Press the ▼ or
▲ key until the upper display shows the correct selection:
CLOSE
, or
OPEn
. Press the FUNC key to
set the value and move to the next parameter, or press the A/M key to go back to the active display.
5.3.4 SETTING THE STATUS OF AUTO/MANUAL SELECTION (IF SUPPLIED)
If the unit does not have the Digital Input option, skip to Section 5.3.5.
NOTE: Remote Auto/Manual is only available when Auto/Manual in Group 1 is set to CNCT.
The ATC770 Pressure/Process controller has four digital inputs that can switch between Manual and
Automatic control (DIG 1), increase (DIG2) or decrease (DIG3) the control output value and switch
from Automatic to Manual setting the control output to zero (DIG4). The Auto/Manual Selection
parameter determines the status of the communication protocol. Select
LoCAL
to use the front push
buttons or RS-485 to control switching from manual to automatic, or Select
CnCt
to use external
means to control switching from manual to automatic.
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