Table of Contents
Advertisement
Functions/operation via PROFIBUS PA
Local Overlay (LO)
.
Out of Service
(O/S)
!
.
136
To allow the drive to insist on maintaining the current position, the
positioner can be set using the PDM to "Local Overlay". In this mode
the positioner valves will not be activated, although they can detect any
leakage. Perform the following settings:
Open the "Operating mode" register
S
Set the target mode to "Local Overlay (LO)".
S
Upload the settings into the positioner.
S
Successful uploading will the reported in the positioner display by "LO".
On loss of electrical power, the drive will discharge the air and remain
in this position until power is restored.
NOTE
Return the device to the target mode "Automatic" in order to re--establish
the effectiveness of the cyclic master setpoints.
Irrespective of the cyclical communications the positioner can be taken
out of service using the PDM.
CAUTION
To avoid personal injuries and equipment damage, note that this action
will cause the drive air to be discharged.
Perform the following settings:
Open the "Operating mode" register
S
Set the target mode to "Out of Service (O/S)".
S
Upload the settings into the positioner.
S
Successful uploading will be reported in the positioner display by
"OS ----".
Even in this target mode the positioner can be switched locally into
manual mode and the drive operated using the keys. The display will
then show "MAN ----". After switching back into automatic mode the "
Not in service mode" (display "OS ----") will be maintained.
After switching back into automatic mode the " Not in service mode"
(display "OS ----") will be maintained.
After a loss of electrical power the drive will remain depressurized.
NOTE
For the cyclical master's setpoints to take effect again, the target mode
must be set to "Automatic".
SIPART PS2 PA Manual
A5E00127926--05
Advertisement
Table of Contents
