All information herein is proprietary and confidential 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 Installation, Operation & Maintenance
Calibration & Commissioning
6A O & M : 13
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 configurable 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
• 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 predefined setpoint is used as a control variable in
the automatic mode.
• The last reached position is retained in the manual
mode.
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 trav-
el 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
“Configuration” mode:
• The upper line shows the value of the diagnosis variable.
• The lower line shows the number and the abbreviation of
the displayed variable.
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.
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