Flowserve Valtek StarPac 1 Intelligent Control Systems - Manual (Page 17)

41-17 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
housing base, being careful to connect the two air-
pressure connections and hallpot arm to their ap-
propriate places. Do not tighten the set screw
now. Reconnect the three wire harness connec-
tions. Attach the temperature sensor wires to the
terminal block, noting polarity.
9. Reattach the remaining top four computer boards,
being certain to reconnect the two wire harness
connections. Properly line up and fully seat the
interface connections.
10. Replace at least one of the three computer board
assembly screws and tighten to hold the stack in
place.
11. Turn on the power supply to the unit again.
WARNING: Do not turn on (energize) the StarPac
unit in explosive atmospheres with the assem-
bly cover removed. Injury to personnel may
result.
12. Use the StarTalk software to apply a stored con-
figuration table for the StarPac unit. Refer to the
Technician Support section of the StarPac manual
for details.
13. Use the Configuration menu of StarTalk software to
set the local display to show Position. Adjust the
hallpot shaft (arrow in Figure 14 within five percent
of the valve’s actual position (since the valve’s air
supply is shut off, this will be either 100 percent
open or closed). Tighten the hallpot set screw.
14. Replace the StarPac electronics assembly shroud.
Tighten the three shroud retainer screws. Restore
the air supply to the unit.
15. Replace the StarPac electronics housing cover.
16. After the new computer boards have been re-
placed, the unit will need to be recalibrated follow-
ing the procedures listed in the Calibration section
of the StarPac manual. Use Stroke Calibration
Section to finish calibrating the position feedback.
17. Reset the operational parameters to bring the sys-
tem back into service.
EPROM Replacement
Occasionally the need may arise to replace the EPROM
of the StarPac. The EPROM contains the operating
program code for the StarPac system. (If the StarPac
system has a special feature or custom program
EPROM, ensure that the new electronics board stack
has the proper EPROM.) The EPROM from the old
board can be traded with the EPROM on the new board
if needed. If the digital board of the faulty system is
suspected to be damaged, a replacement EPROM can
be ordered from a Flowserve representative. The bill of
material for the system will contain the unique part
number for the special EPROM.
If the EPROM needs to be replaced, refer to Figures 4
and 5 then proceed as follows.
CAUTION: This procedure should only be done by
personnel trained in the proper handling of sensi-
tive electronic components.
1. Make sure the valve is either by-passed or in a safe
condition.
2. Turn off the 24 VDC power to the StarPac and air
supply to the actuator.
3. Remove the StarPac electronics housing cover.
WARNING: Never remove the StarPac electron-
ics assembly cover if explosive atmospheres
are present; otherwise, injury to personnel can
occur.
4. Remove three circuit board assembly screws and
lift the protective shroud off the board assembly.
5. Carefully unplug the local display board (top) from
the rest of the board assembly. This exposes the
digital board with the EPROM. The EPROM is
located in a square holder at the edge of the board.
6. Remove the old EPROM by using a PLCC extrac-
tion tool. Notice that two opposite corners of the
EPROM socket are slotted. The fingers of the tool
slide all the way into these slots. The fingers of the
tool should catch under the corners of the EPROM.
Squeeze the tool to extract the EPROM and pull it
out from the socket.
7. Carefully remove the new EPROM from its protec-
tive carrier. Handle the EPROM carefully by the
corners and use whatever anti-static precautions
are available. A typical method is to keep one hand
on a grounded metal item and handle the device
with the other hand. The static sensitive device is
protected once it is in its socket. Notice that the
EPROM has one corner trimmed, one top edge
beveled, and a dot cast into the top. Align the
EPROM in the socket so that the dot and beveled
edge face the small square silk-screened on the
edge of the PC board. The trimmed corner should
be on the left as shown by the silk-screen outline.
CAUTION: The StarPac contains sensitive elec-
tronic components. Use proper antistatic
(grounding) precautions when handling the
EPROM and insert properly or the EPROM may
be damaged.
8. Firmly press the EPROM into the socket. It should
be slightly below the edges of the socket to be fully
seated.
9. On the dip switch, located next to the bus connec-
tor, set switch 2 INIT on by toggling the switch down.
10. Carefully plug the top display board back on the
stack making sure all pins are aligned in the bus
socket.