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6A
User Manual
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Bray 6A User Manual

SERIES 6A
ELECTRO-pnEumATIC pOSITIOnER
OPERATION AND MAINTENANCE MANUAL
Series 6A Operation & Maintenance – Table Of Contents
CONTENTS
6A O & M : 2
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Series 6A Operation & Maintenance – Safety
SAFETY INFORMATION - DEFINITION OF TERMS
indicates a potentially hazardous situation which, if not avoided, could result in
Q WARNING
Q CAUTION
death or serious injury.
indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
NOTICE
Hazard-free use
This device left the factory in proper condition to be safely installed and operated in a hazard-free manner. The notes and warnings in this document must be observed by the user if this safe condition is to be maintained and hazard-free operation of the device assured.
• Take all necessary precautions to prevent damage due to rough handling, impact, or improper storage. Do not use abrasive compounds to clean, or scrape its surfaces with any objects.
• Conguration and calibration procedures are described in this document. Proper conguration and calibration is required for the safe operation.
• The control system in which the unit is installed must have proper safeguards to prevent injury to personnel, or damage to equipment, should failure of system components occur.
• This document does not cover every detail about every version of the product described. It cannot take into account every potential occurrence in installation, operation, maintenance and use.
• If situations transpire that are not documented in sufcient detail, please request the required information from the Bray Distributor or Representative responsible for your area.
used without the safety alert symbol indicates a potential situation which, if not avoided, may result in an undesirable result or state, including property damage.
Qualified Personel
A qualied person in terms of this document is one who is familiar with the installation, commissioning and operation of the device and who has appropriate qualications, such as:
• Is trained in the operation and maintenance of electric equipment and systems in accordance with established safety practices.
• Is trained or authorized to energize, de-energize, ground, tag and lock electrical circuits and equipment in accordance with established safety practices.
• Is trained in the proper use and care of personal protective equipment (PPE) in accordance with established safety practices.
• Is trained in rst aid.
• In cases where the device is installed in a potentially explosive (hazardous) location – is trained in the operation, commissioning, operation and maintenance of equipment in hazardous locations.
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
6A O & M : 3
Series 6A Operation & Maintenance – Introduction
INTRODUCTION
The Bray S6A is a microcontroller based positioner for pneumatic actuators. The S6A converts an analog current signal into a valve position pressure signal and offers positioner, valve and actuator diagnostics using a variety of communication protocols. Optional modules can be added for full range valve position feedback, valve open/close verication, preset alarm warnings and electromagnetic compatibility.
Principles of Operation
The operation of the S6A can be described in three parts; the user dened setpoint, the pneumatic actuator air supply, and the S6A internal controller. The user dened setpoint, which is provided by the incoming analog signal or the communication protocol, tells the positioner where to set the actuator. The pneumatic actuators air supply provides the power to work the valve, and the S6A internal microcontroller monitors the actuator position and provides diagnostics to the end user.
When the microcontroller sees a deviation between the actual position of the actuator and the provided setpoint it will pulse the internal piezo electric valve in order to let air ll the corresponding actuator chambers and drive the actuator from the pneumatic supply lines. Once this deviation is within a desired tolerance or “dead band” the microcontroller will stop the pulsing. Using this process, the S6A only consumes air when it is needed, meaning it will pay for itself within a short period of time.
Electrical Operation
The standard S6A requires 4 to 20mA loop power for all of the internal electronics. It can be installed in a two wire, three wire, or four wire architecture. There is no need to run separate power and signal wiring. The S6A positioners with communication modules get their power directly from the network. All of the wiring diagrams for the different versions of the S6A and any optional modules are shown in the “Field Connections” portion of this manual.
Mechanical Operation
The S6A requires a pneumatic supply in the range of 20 - 102 psi (1.4 - 7 BAR). Using this pneumatic supply, the S6A will position the actuator and valve precisely where it needs to be to regulate the process. Once in the settled state, the S6A has one of the lowest air bleed rates in the market. The S6A requires a pneumatic sup­ply rated at Class 2 in accordance with ISO 8573-1. An optional lter can be installed upstream of the S6A to clean incoming air. Diagrams are provided showing how to make the pneumatic con­nections in the “Field Connections”portion of this manual.
6A O & M : 4
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Series 6A Operation & Maintenance – Installation
INSTALLATION
Mounting to an Actuator
All Bray S6A positioners are suitable for mounting on Bray pneu­matic actuators with the use of a standard mounting bracket. With proper mounting hardware, the S6A positioner can be installed onto other linear or quarter turn pneumatic actuators. The stan­dard mounting position is to orient the unit directly over the pneumatic actuator using the NAMUR mounting arrangement in such a way that the LCD and pushbuttons are easily accessible. If the positioner is to be mounted on a vertical pipe, it is recom­mended that the unit be positioned with the conduit entries on the bottom to prevent condensation from entering the positioner by way of conduit. In all cases, the conduit should be positioned to prevent drainage into the positioner.
Tools Needed:
• 5mm Allen Key
• 5/16" Wrench
Parts Needed:
Item Qty.
The positioner should be mounted to the actuator as follows:
1. Turn the positioner upside down and align the provided mount­ing bracket over the positioners output shaft. The bracket should align with the four threaded holes around the output shaft.
2. Using the 5mm allen key afx the mounting bracket to the positioner using the four lockwashers and mounting bolts [A].
3. Turn the positioner right side up and position the output shaft so that the atted side is facing you.
4. Insert the coupler over the output shaft, ensuring that the couplers set screw is in alignment with the at of the shaft. Tighten the couplers set screw.
5. Place the yellow indicator on the base of the coupler.
6. Mount the positioner on top of the actuator and tighten it using the 5/16" wrench and the four mounting bolts [B].
Refer to the S6A Quick Start Guide for details.
Mounting Bolts [A] (4)
Lockwashers (4)
Mounting Bolts [B] (4)
Mounting Bracket (1)
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
6A O & M : 5
Series 6A Operation & Maintenance – Field Connections
4 ... 20 mA
BE1 = Binary Input
7 8 9
10
+
–
J
6
4 ... 20 mA
BE1 = Binary Input
7 8 9
10
+
–
J
6
2
3
4 5
+
–
J
6 7 8 9
10
4 ... 20 mA
BE1 = Binary Input
4 ... 20 mA
BE1 = Binary Input
7 8 9
10
+
–
J
6
1) Jumper between 5 and 7 only for three-wire system
2
3
4 5
+
–
J
6 7 8 9
10
4 ... 20 mA
0/4 ... 20 mA
2
3
4 5
+
–
6 7 8 9
10
18 ... 30 V
J
+
–
BE1 = Binary Input
BE1 = Binary Input
1)
4 ... 20 mA
BE1 = Binary Input
7 8 9
10
+
–
J
6
HART modem
PC/Laptop
R 250 W if req.
1)
3
Only required with current sources not conforming to HART1)
2
3
4 5
+ –
I
l
y
= 4 ... 20 mA
6 7 8
l
W-
l
H+
1) Jumper between 5 and 7 only for three-wire system
2
3
4 5
+
–
J
6 7 8 9
10
4 ... 20 mA
0/4 ... 20 mA
2
3
4 5
+
–
6 7 8 9
10
18 ... 30 V
J
+
–
BE1 = Binary Input
BE1 = Binary Input
1)
FIELD WIRING
Each S6A is provided with two conduit entries for power/incom­ing analog signal of the main unit and any optional modules.
Please refer to the wiring diagrams referenced in this docu­ment when connecting the positioner and any optional modules. It is essential to install the optional modules before connect­ing the positioner electrically. Refer to the following “Technical Description” portion of this manual for relevant power distribu­tion sizing information when installing a S6A positioner and its optional modules.
Safety Notes:
• Local regulations regarding hazardous environments must be followed when installing this device in a hazardous location.
• The conduit connections must be properly sealed to maintain the weatherproof integrity of the actuator enclosure.
• Never connect the current input (terminals 6 and 7 as shown on the diagrams to the right) to a power source; the positioner will probably be destroyed in that case. Always use a current source with a maximum output current of I = 20 mA.
• To maintain auxiliary power, the input current must be a min­imum of 3.6 mA.
Note: The plastic enclosure is metallized from inside to increase the electromagnetic compatibility (EMC) with respect to high-frequency radiation. The shield is connected to the threaded bush shown in Figure 1 such that it is elec­trically conductive. This protection is effective only if you connect at least one of the bushes to the grounded control valves through electrically conductive (bare) attachments.
1.
2.
3.
Figure 1.
Tools Needed:
• Instrument Screwdriver
I. General Area
1. Two Wire
+
4 ... 20 mA
J
6 7
–
8 9
BE1 = Binary Input
10
2. Two Wire Connection When Using a 2/3/4 Wire Device
2
+
J
4 ... 20 mA
3
4 5
6 7
–
8
BE1 = Binary Input
9
10
3. Three/Four Wire
+
2
18 ... 30 V
J
1) Jumper between 5 and 7 only for three-wire system
0/4 ... 20 mA
3
–
4 5
1)
+
6 7
–
8 9
10
BE1 = Binary Input
4. HART
1)
l
= 4 ... 20 mA
y
2
l
H+
3
4 5
6
l
7
W-
8
PC/Laptop
I
Only required with current sources not conforming to HART1)
3
R 250 W if req.
+ –
HART modem
5. Probus DA/DP, Foundation Fieldbus
≤ 30 V
+ –
≤ 24 V
+
–
Input for safety shutdown (activated using coding jumper)
1)
1)
81 82
6 7
9
BE1 = Binary Input
10
6A O & M : 6
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
4 ... 20 mA
BE1 = Binary Input
7 8 9
10
+
–
J
6
Input for safety shutdown (activated using coding jumper)
1)
≤ 30 V
≤ 24 V
+ –
BE1 = Binary Input
7
9
10
+
–
6
1)
81 82
1)
HART modem
PC/Laptop
R 250 W if req.
1)
3
Only required with current sources not conforming to HART1)
2
3
4 5
+ –
I
l
y
= 4 ... 20 mA
6 7 8
l
W-
l
H+
1) Jumper between 5 and 7 only for three-wire system
2
3
4 5
+
–
J
6 7 8 9
10
4 ... 20 mA
0/4 ... 20 mA
2
3
4 5
+
–
6 7 8 9
10
18 ... 30 V
J
+
–
BE1 = Binary Input
BE1 = Binary Input
1)
Series connection of 2 positioners, e.g. split range (auxiliary power wired separately), EEx i
Series 6A Operation & Maintenance – Field Connections
II. Hazardous Area (Intrinsically Safe)
A. Two Wire
Non-hazardous area Hazardous area, Zone 1
EEx
Intrinsically safe power source
4 to 20 mA
B. and C. Two Wire Connection When Using a 2/3/4 Wire
Device and HART
Non-Hazardous area
EEx
I
Intrinsically safe power source
Hazardous area, Zone 1
+
4 to 20 mA
6
7 8 9
10
2 3 4 5
6 7 8 9
10
HART Communicator 6A-6DR52**-*E*** only
#
Positioner
E
A
#
Positioner
Binary input 1
Binary input 1
Multiple Positioners Field Wiring
Split Range
Auxiliary power
Intrinsically safe power sources
Entire positioning
Non-hazardous area Hazardous area, Zone 1
EEx
EEx
L+
V
I
I
range I
+ 18 to 30 V
M
y
M
+ 0/4 to 20 mA
y
2
3
4
5
6
7
8
9
10
2
3
4
5
6
7
8
9
10
Positioning range 1
BE1
#
Positioning range 1
BE1
#
D. Three/Four Wire
Non-hazardous area Hazardous area, Zone 1
18 to 30 V
+
EEx
I
EEx
I
Intrinsically safe power source
E. Probus DA/DP, Foundation Fieldbus
Non-Hazardous Hazardous area, Zone 1
Power Supply
4 to 20 mA
+
*)
–
+
2
3 4 5
6
*)
7 8 9
10
HART Communicator 6A-6DR52**-*E*** only
≤ 24 V
–
Input for safety shutdown (activated using coding jumper)
Positioner
E
A
#
*) Three-wire connection only
81 82
6 7
9
BE1 = Binary Input
10
Binary input 1
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
6A O & M : 7
Series 6A Operation & Maintenance – Field Connections
Connecting Pneumatic Supply Lines
Refer to the Technical Data portion of this manual for specica­tions regarding air quality.
The S6A is equipped with three pneumatic connections, Y1, Y2 and PZ. PZ is for the pneumatic supply and Y1 and Y2 are used to supply the pneumatic actuator. The S6A can also be equipped with a pressure gauge block for monitoring supply and actuating pressure and a lter to ensure that the S6A is receiving clean air.
Proceed as follows to make the pneumatic connections:
Refer to Figure 2.
Y1
PZ
Y2
E
Figure 2. - Pneumatic connection on the standard controller
1. If required, connect the pressure gauge block for supply air and actuating pressure.
2. Connect supply air to PZ.
Connection using female thread G1/4 DIN 45141 or 1/4" NPT:
• PZ supply air 20psi to 102psi (1.4 to 7 bar)
• Y1: actuating pressure for single and double-acting actuators
• Y2: actuating pressure for double-acting actuators
• E: exhaust air outlet; remove the attenuator if required.
For double-acting actuators, connect actuating pressures Y1 or Y2 depending on the desired safety position. The three pneumatic connections will go to the following safety position in case of electrical auxiliary power sup­ply failure:
• Y1: single-acting, depressurized
• Y1: double-acting, max. actuating pressure/supply air pressure.
• Y2: double-acting, depressurized
Note: Besides continuous air consumption, the positioner may try to compensate the position deviation due to leakage. This will lead to premature wear in the entire control unit. To prevent this ensure that all pneumatic connections are properly sealed and perform regular maintenance on their ttings.
6A O & M : 8
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Series 6A Operation & Maintenance – Field Connections
1
2
3
Restrictors
The S6A is equipped with air restrictors to reduce the air output to achieve actuating times of T > 1.5 s for small actuators. Restrictors 1 and 2 are used for this purpose.
Tools Needed:
• Hexagon socket 2.5 mm
Refer to Figure 3.
When turned clockwise, they reduce the air output and nally shut it off.
In order to set the restrictors, it is recommended to close them and then open them slowly.
In case of double-acting actuators, ensure that both restrictors have approximately the same setting.
Purging
The S6A is equipped with a purge air switch that allows the actuator to purge air either inside of the unit or directly outside. When the enclosure is open, the purge air switch above the pneumatic terminal strip on the pneumatic block can be accessed.
Tools Needed:
• Instrument Screwdriver
Refer to Figure 4.
In the IN position, the enclosure is ushed from inside with a small volume of clean and dry instrument air.
In the OUT position, the purge air is directed towards outside of the unit.
Figure 3. - Air Restrictor
➀Restrictor for Y1
➁Restrictor for Y2, only in the version for double-acting
actuators
➂Hexagon socket-head screw 2.5 mm
Figure 4. - Purge Air Switch
➀Purge Air Switch
➁Pneumatic Block
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
6A O & M : 9
Series 6A Operation & Maintenance – Field Connections
Natural Gas as an Actuator Medium
The S6A can also be operated with natural gas as an actuator medium. When operating the positioner with natural gas, you must follow and adhere to the following safety notes:
1. Only the “EEx ia” version of the positioner and optional modules with the “EEx ia” type of protection may be operated with natural gas. Positioners with other types of protection, i.e. ameproof enclosures for zones 1 and 2 are not permitted.
2. Do not operate the positioner with natural gas in closed spaces.
3. Natural gas is continuously blown off in the servo-drive depending on the model. Special care must therefore be taken during maintenance activities near the positioner. Always ensure that the immediate surroundings of the positioner are adequately ventilated.
4. The mechanical limit switch module may not be used when operating the positioner with natural gas.
5. Depressurize the devices operated with natural gas adequately during maintenance activities. Open the cover in an explosion­free atmosphere and depressurize the device for at least two minutes.
Normally you operate the positioner with compressed air. Natural gas has been approved as an actuator medium for intrinsically safe positioners with the “EEx ia” type of protection. Only use natural gas which is clean, dry and free from additives.
The positioner releases the used natural gas through the exhaust air outlet E (see Figure 2). The exhaust air outlet E is equipped with an attenuator. As an alternative to this standard conguration, the exhaust air outlet can be replaced with a G¼ screwed tting. You have to dismantle the attenuator for this purpose. Natural gas escapes parallel to the exhaust air outlet E, from the enclosure vent at the bottom side of the device, and from the control air outlet near the pneumatic connections. This escaping natural gas cannot be collected and carried off. When using natural gas as an actuator medium refer to Figure 5 for maximum bleed off values.
Optional Accessories
1. Pressure Gauges – used to measure and indicate supply and
actuating pressures
2. Filter – used to clean the supply medium
3. Non Contacting/External Position Detection System – used
for harsh environments
4. SIMATIC PDM Operation Software – used for online
diagnostics of the S6A
Contact your Bray representative for specic requirements for your intended application.
Figure 5. Maximim bleed off values
Bleeding process Operating
Bleed the enclosure volume through the bottom side of the device. Purge air switch is at "IN":
Bleed through the control air outlet near the pneumatic connections:
Bleed through the exhaust air outlet E
6A O & M : 10
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
ode
m
Operation,
typical
Operation,
max.
Error case,
max.
Operation,
typical
Operation,
max.
Error case,
max.
Operation,
max.
Error case,
max.
6A-6DR5*1*-
*E***
Single-acting Double-acting
[
Nl/min] [Nl/min]
0.14 0.14
0.60 0.60
60.0 60,0
1.0 2.0
8.9 9.9
66.2 91.0
358.21) 339
6
A-6DR5*2*-
*E***
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32.1 62.1 ]l[ .xaM emuloV
Series 6A Operation & Maintenance – Calibration & Commissioning
CALIBRATION AND COMMISSIONING
Installing a New Unit
Please refer to the S6A Quick Start Guide for the Standard Unit.
Replacing a Unit
The S6A can be replaced in a running system where a S6A was already in use without interrupting the process. By copying and transferring the device and initialization data, it is possible to commission a replacement positioner without needing to initial­ize it. The S6A uses the communication interface to transfer data. When this is performed, it is crucial to perform a standard initial­ization of the replacement positioner as soon as possible because the following properties can be ensured only after initializing:
• Optimum adjustment of the positioner as per the mechanical and dynamic properties of the actuator.
• Unrestricted accuracy and dynamic behavior of the positioner.
• Deviation-free position of the hard-end stops.
• Accuracy of the maintenance data
Copy the initialization data and the device parameters as follows:
1. Read in the initialization data and the device parameters of the
positioner to be replaced. Use a suitable parameterization tool for this purpose.
2. Save the data in the parameterization tool.
Note: If the positioner to be replaced has already been initialized or congured using the parameterization tool, you need not read in and save the device data.
Proceed as follows to replace a positioner in a running system:
3. Fix the actuator at its current position mechanically or
pneumatically.
4. Determine the actual position value.
– Read the actual position value on the digital display of
the positioner to be replaced.
Take note of the read value.
– If the electronic unit of the positioner is defective, mea-
sure the actual position value at the actuator or the valve. Take note of the read value.
5. Dismantle the positioner.
6. Attach the lever arm of the positioner to be replaced to the
replacement positioner.
7. Install the replacement positioner on the control valve.
8. Set the transmission ratio selector of the replacement positioner
to the same position as that of the positioner to be replaced.
9. Use the parameterization tool to transfer the saved device and
initialization data to the replacement positioner.
10. If the displayed actual position value differs from the noted value, correct the deviation by moving the friction clutch.
11. The replacement positioner is ready for operation when the displayed and the noted values match.
Operation
Reading the LCD screen
The S6A digital display has two lines, one on the bottom and one on top. Each element on the top line has seven segments while each element on the bottom line has fourteen. Contents of the dis­play depend on the selected mode. Figure 6 below provides an example of what the display will look like when the unit is pow­ered on.
Figure 6. Example Display
Note: When operated in temperature ranges below 14°F (-10°C), the liquid crystal display of the positioner becomes sluggish and the repetition rate display is reduced considerably.
Using the pushbuttons
The S6A is manually operated using three pushbuttons. The cover of the positioner has to be removed in order to operate the buttons.
Note: The function of the buttons depends on the current Operating Mode. As a general rule the following applies:
The operating mode button is used to select the modes and to
forward the parameters.
The decrement button is used to select parameter values when
conguring. You can use this button to move the actuator in the manual mode.
The increment button is also used to select parameter values
when conguring. You can use the increment button to move the actuator in the manual mode.
+ *Parameters are activated in the reverse order by press-
ing the operating mode button and the decrement button at
the same time
Note: The IP66/NEMA 4x degree of protection is not ensured as long as the positioner is open.
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
6A O & M : 11
Series 6A Operation & Maintenance – Calibration & Commissioning
Operating Modes
The S6A has ve different operating modes described in detail below. Refer to Figure 7 to navigate between modes.
Operating Mode Display
P- manual operation
change position with
Congure
select parameter
with
or +
change value with
Manual Operation
change position with
Automatic
> 5 s
> 5 s > 5 s
1x
PRST
> 5 s
> 2 s
1x
Configuration and initialization mode
To get to the “Conguration” mode, press the operating mode button for at least 5 seconds. You can use the “Conguration” mode to adjust the positioner individually as per your actuator and start commissioning or initialization. The positioner reports the “Conguration” mode with a congurable fault message. A position feedback or display of limits A1 and A2 is not possible.
Note: If electrical auxiliary power supply fails when conguring, the positioner responds as follows until the power supply is reestablished:
• The positioner switches to the rst parameter.
• Settings of the values already congured are retained.
In order to save the changed parameter values, exit the “Conguration” mode or switch to another parameter. When the “Conguration” mode is restarted, the control in the digital display switches to the last activated parameter.
Diagnostics
Figure 7. Operating Modes Display
> 2 s
> 2 s
> 2 s
P-manual mode (as-delivered condition)
The “P-manual mode” is preset for the positioner in the as-delivered condition. The digital display of the positioner shows the current potentiometer position in the upper line. “NOINI” blinks in the second line of the digital display. You can move the actuator using the decrement and increment buttons. Switch to Conguration” and “Initialization mode” to adapt the actuator as per the positioner.
Alarms or position feedbacks can be triggered only after initializing the positioner completely.
Manual mode (MAN)
You can move the actuator using the decrement and increment buttons in this mode. The setting selected here is retained irrespective of the setpoint current and leakages, if any.
Note: To accelerate the actuator movement keep one of the two direction buttons pressed and simultaneously press the remaining direction. In the event of a failure of the power supply, once the power is reestablished the positioner switches to “Automatic” mode.
6A O & M : 12
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Series 6A Operation & Maintenance – Calibration & Commissioning
Automatic (AUT)
Automatic is the standard mode. In this mode, the positioner compares the setpoint position with the actual position. The positioner moves the actuator until the control deviation reaches the congurable dead zone. A fault message is displayed if the dead zone cannot be reached.
Diagnostics
Proceed as follows to call the “Diagnostics” mode from the “Automatic” or “Manual” modes:
Press the three buttons of the positioner at the same time for at least 2 seconds.
Current operating data can be called and displayed in this mode, e.g.:
• Stroke number
• Number of changes in direction
Using the built in Diagnostics
The S6A has various monitoring functions with which changes on the actuator and valve can be detected and signaled if applicable when a selectable limit has been exceeded. This information may be important for diagnosis of the actuator or valve and will help to schedule preventative maintenance. The measuring data that is monitored is listed below:
• Travel integral
• Number of changes in direction
• Alarm counter
• Self-adjusting dead zone
• Valve end limit position (for detection of valve seat wear or deposits)
• Operating Hours (also according to temperature and travel ranges) as well as min./max. temperature
• Operating Cycles of piezoelectric valves
• Valve positioning time
• Actuator leakages
The diagnostics display has similar structure to that of the “Conguration” mode:
• The upper line shows the value of the diagnosis variable.
• The lower line shows the number and the abbreviation of the displayed variable.
• Number of fault messages
Note: The “Automatic” and “Manual” modes remain set when switching to the “Diagnostics” mode. The positioner responds as per the set mode:
• The predened setpoint is used as a control variable in the automatic mode.
• The last reached position is retained in the manual mode.
Some diagnostics values can be greater than 99999. In such a case, the display switches over to the exponential view. Example: The value “1234567” is shown as “1.23E6”.
In the event of a fault an error code will be shown on the lower left hand corner of the display. There is a fault table in the “Troubleshooting” section of this manual which explains what each of these codes represents.
The following table provides an overview of values that can be displayed. The last column contains “X” if the value can be set to zero.
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc. The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
6A O & M : 13
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