PICO Toµch Controller
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Icon Description
SYSTEM
(SYSTEM
password
required for
access)
Opens the SYSTEM screen, which provides access to the system-level settings.
Setting Description
PULSE OFFSET Sets a minimum time (in ms) difference allowed between the VALVE screen CYCLE
and PULSE settings. For example, if PULSE OFFSET is set to 3 and a user enters
1.00 (ms) for CYCLE, then the setting entered for PULSE must be 4.00 ms or greater.
MAX PULSER
Time
Sets the maximum time (in ms) that the CYCLE icon can be held active in the
Continuous mode or when purging.
SHOW VALVE
External
Adds EXTERNAL to the MODE selections available on the VALVE screen. Refer
to MODE under "VALVE Screen" on page 19 for additional information on the
external mode.
MIN CYCLE Time Sets a minimum time (in ms) that can be entered for CYCLE on the VALVE screen.
The controller automatically modies an entered CYCLE setting if it exceeds the safe
operating range of the connected valve. For example, for an SD valve, the controller
limits the CYCLE time to a minimum of 4 ms (250Hz).
Default: 30 (ms)
PULSE OK Time Sets how long the PULSE OK output signal (pin 14 on the 15-pin I/O connector) stays
on AFTER the current dispense parameters are executed.
Default: 6 (ms)
Range: 1–100 (ms)
CELSIUS or
FAHRENHEIT
Sets how temperature units are displayed (Celsius or Fahrenheit).
SERVICE Nordson EFD use only.
Show STACK
Temp.
When SHOW STACK TEMP is toggled on, the controller displays the actual
temperature of the piezo actuator stack on the VALVE screen. When SHOW STACK
TEMP is toggled off, the stack temperature is not displayed.
NOTE: This setting becomes useful when the valve is operating at the higher end
of its operating range. Stack temperature is a crucial variable that can cause the
controller to generate an alarm as it tries to protect the valve. For example, if an SD
valve is running at a high frequency, the stack temperature increases. Once the stack
temperature reaches 55° C (131° F), the controller generates an alarm because the
valve temperature is getting too hot.
PASSWORDS Opens the SET CONTROL PASSWORD screen, which provides access to the
password setup options. Refer to "Managing Password Protection" on page 36 for
additional information.
RESET Forces a reset of the LCD and re-initiates communication with the controller. All
settings return their factory default values. Performing a reset causes an LCD fault
alarm.
SYSTEM Screens
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