Technical information

IM-P343-29 CH Issue 534
9.4 AUTOS - automatic autostroke commissioning
AUTOS
% Travel
(TRAVL
0-100% /
100-0%)
Autostroke activate
(AUTOS)
3 second
enter
Fig. 32
Programming notes
AUTOS provides access to:
1. Autostroke commissioning (AUTOS). 2. % travel display (TRAVL).
AUTOS
Autostroke provides an automatic commissioning routine which will take
approximately 1 to 3 minutes to complete.
Press and hold key for 3 seconds to start autostroke. The display will count
down the 3 seconds. When autostroke is active a flashing AUTOS message
will be displayed.
On completion of a successful autostroke the programme will automatically
return to AUTOS in the main menu and a will be displayed. In the event of
an unsuccessful autostroke routine a flashing ! will be displayed.
If during AUTOS inconsistent data is obtained due to mechanical problems, the
autostroke procedure will be terminated and ABORT will be displayed.
It is also possible to immediately abort during an autostroke routine by pressing
the key. ABORT will be displayed together with a flashing !.
Error messages:
ERROR 1 Indicates a wrong mechanical coupling between positioner and
actuator. Check the mounting is correct.
ERROR 2 Indicates that there is insufficient air pressure to achieve valve
movement. Check that the air supply is adequate to overcome the actuator
spring force. Fitting of a gauge block will aid the commissioning procedure.
ERROR 3 Indicates that the actuator will not deflate. Check that there is
no obstruction preventing the stem travel or air venting from the actuator.
ERROR 4 indicates that the stroke measured is less than the minimum
stroke allowed - 10 mm for linear valves, and 5° for quarter turn valves
(output 1 and output 2 for double action applications).
ABORT indicates mechanical problems have occurred during the Autostroke
procedure or the key has been pressed during Autostroke to abort the
procedure.
On completion of a successful autostroke it will be possible to advance to
SET, TUNE and RUN functions in the main menu. Press the key to advance
to these functions.
Commissioning notes
Prior to undertaking an autostroke routine, manual operation should be used to fully
inflate and deflate the actuator to ensure there are no obstructions to the full valve
movement. Autostroke is an automatic commissioning routine that checks for maximum
valve travel, signal response, valve characteristics, inflation / deflation times etc. Data
gathered will be automatically download into the embedded software to ensure optimum
performance of the valve / actuator combination.
Autostroke commissioning will take approximately 1 to 3 minutes to complete
depending on air pressure and actuator size etc.
Autostroke commissioning must be carried out on start-up or at any other time if the
valve performance is not satisfactory.