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Introduction
NOTE:
The PICO controller is also available in a kit that includes a PROFIBUS communicator. This kit is for
installations that use the PROFIBUS communication protocol. Refer to “Supplement for the PICO Controller V3 Kit
with PROFIBUS Communicator” on page 55 for all information specific to the use of the PICO controller with the
PROFIBUS communicator.
Product Description
The PICO controller 2+2-2CH-V3 (two-channel) or 2+2-4CH-V3 (four-channel) is an electronic device used for the
timed control of the PICO
Toµch
controller. The PICO controller transmits electronic signals in the form of pulse-
pause lines and pulse-pause blocks at a constant signal level for a variable (programmable) duration. These pulse
sequences directly affect the downstream devices.
The output pulse sequences consist of interlinked pre-programmed pulse-pause lines.
Variable parameters such as dispensing time, cycle duration, delay time, and number of pulses are entered via an
SD card or by using PLC/PC and fieldbus communication. Data is stored on the SD card using an external PC.
Operating parameters can be changed locally at the PICO controller (within the limits specified in the PICO controller
program) by using the Menu dial and integral Enter key and the ESC (Escape) key, which are located on the front of
the PICO controller.
Changing the operating parameters via PLC or PC is more convenient when using the fieldbus communication
interface of the PICO controller. The following additional benefits of using the fieldbus communication interface can
help improve process reliability:
• Local changes to the PICO controller operating parameters can be blocked via PLC/PC.
• The PICO controller’s active process parameters can be read and documented through the PLC/PC.
The PICO controller has a feature that calculates the fluid left in the container. Each dispensed amount is subtracted
from the original quantity of material in the container. When a customer-specified low-level limit is reached, a
message appears on the PICO controller display and a status signal is transmitted to a primary control device, such
as a programmable logic controller (PLC).
The controller is designed as a plug-in cassette for a 48.3-cm (19-in.) chassis. Pulse-pause signals are emitted via
two (optionally four) channels that work independently of one another. The control process (the beginning of the
control impulse output) performed by the PICO controller can be triggered by channel (for example, by the PLC, via
10 binary single signals, via fieldbus, or manually).
When the EMERGENCY OFF is actuated for a channel, the current dispensing pulse is either ended or stopped,
depending on the value set for the Stop parameter. Then, the transmission of additional control signals is
interrupted.
PICO Controller 2+2-XCH-V3
5
www.nordsonefd.com [email protected]
+1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.