Flowserve Valtek StarPac 1 Intelligent Control Systems - Manual (Page 8)

41-8 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
the embedded software program on the StarPac sys-
tem to stop abnormal operation or clear persistent
errors. This includes errors sometimes caused by brief
power interruptions, or resetting the software after
changing the EPROM.
The reset switch forces the StarPac system through the
startup and diagnostics sequence that the system nor-
mally goes through on system power up, and it initial-
izes the program execution to the starting instruction.
The startup sequence also checks internal CPU regis-
ters and all of the volatile and nonvolatile RAM. While
initializing the system the local display shows the ver-
sion number of the EPROM currently installed in the
system. The last thing done by a reset is to clear and
initialize the watchdog timer on the CPU.
A reset can be done by powering the unit down for five
seconds or more and reconnecting the power, or by
resetting the system by pushing the 'Reset' switch down
(on) for five seconds and then moving the switch back
up (off).
NOTE: If the reset switch is left down (on) the CPU will
be halted until the switch is moved up (off).
The 'Initialize' switch (no. 2 or labeled INIT on the PC
board) resets some of the internal work registers to
known values and resets the EPROM checksum. The
switch also sets the command or setpoint source to
receive a 4 - 20 mA analog signal. The 'Initialize' switch
is only accessed by the CPU during a reset.
An initialization is done by setting the INIT switch
down (on) and then resetting the CPU as described
above. After an initialization the system is left in the
calibration mode, which is an out of service mode,
meaning that the system will not respond to normal
commands. StarTalk software must be used to put
the system back into an operating mode. The com-
mand or setpoint source must also be reset to
digital if that is the normal operating source.
If the INIT switch is left down (on), the system will
startup in the calibration mode each time power is lost
to the unit or the Reset switch is put in the on position.
This feature can be beneficial if it is desired to manually
reset the system after a power outage to ensure safe
startup.
If the system must be reset using the dip switch as
described above or initialized, refer to Figure 4 and
proceed as follows:
1. Make sure that the StarPac system and valve can
be taken off line without disrupt the process.
2. Remove the large cover from the StarPac elec-
tronic housing.
WARNING: Never remove the StarPac cover in
explosive atmospheres; otherwise potential
injury may result to personnel and equipment.
Figure 9:
Shroud Retaining Screws / Local Display
4. Remove the white plastic protective shroud from
the electronic assembly by removing the two screws
from the display end of the assembly. For NT units,
locate the jumper I/P Bypass at the edge of Analog
board number 1. (Refer to Figure 8 and proceed to
step 9.)
5. Next, for SP units only, remove the third screw that
holds the board stack in place.
6. Carefully grasp the computer boards and gently
pull them away from the housing.
7. Locate the jumper on the bottom board (shown in
Figure 8), labeled J105. Remove the jumper from
the two pins and reinsert it onto only one pin for
storage if wanting the valve to fail immediately per
the actuator fail-safe spring configuration. To reac-
tivate the manual failure mode place the jumper
over the two pins labeled J105.
8. Carefully reinstall the top four computer boards
onto the assembly. Be certain the computer board
connector pins are lined up and securely attached
to the bottom board connector. Be certain the top
boards are in line with the bottom board.
9. Replace the protective shroud, install and tighten
the three computer board assembly retaining
screws.
10. Replace the StarPac electronics assembly cover.
Resetting or Initializing the StarPac
The 'Reset' and 'Initialize' switches are the first two dip
switches on the second switch block (see Figure 4). On
rare occasions it may be necessary to reset or initialize