Nordson EFD V3 User manual

The PICO®controller is a programmable device used for the
automatic control of dispensing processes involving small
amounts of variously viscous fluid media.
Read this operating manual thoroughly prior to the initial
operation of the dispensing system.
This manual also applies to the PICO controller V3 kit, which
includes the PROFIBUS communicator.
PICO Controller 2+2-XCH-V3
Operating Manual
™
Electronic pdf files of Nordson EFD
manuals are also available at
www.nordsonefd.com

You have selected a reliable, high-quality dispensing system from Nordson EFD, the world leader in fluid
dispensing. The PICO®controller was designed specifically for industrial dispensing and will provide you
with years of trouble-free, productive service.
This manual will help you maximize the usefulness of your PICO controller.
Please spend a few minutes to become familiar with the controls and features. Follow our recommended
testing procedures. Review the helpful information we have included, which is based on more than
50years of industrial dispensing experience.
Most questions you will have are answered in this manual. However, if you need assistance, please do
not hesitate to contact EFD or your authorized EFD distributor. Detailed contact information is provided
on the last page of this document.
The Nordson EFD Pledge
Thank You!
You have just purchased the world’s finest precision dispensing equipment.
I want you to know that all of us at Nordson EFD value your business and will do everything in our power
to make you a satisfied customer.
If at any time you are not fully satisfied with our equipment or the support provided by your Nordson
EFD Product Application Specialist, please contact me personally at 800.556.3484 (US), 401.431.7000
(outside US), or [email protected].
I guarantee that we will resolve any problems to your satisfaction.
Thanks again for choosing Nordson EFD.
Srini Subramanian, General Manager
Srini Subramanian
PICO Controller 2+2-XCH-V3
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Contents..........................................................................................................................................................................3
Introduction .....................................................................................................................................................................5
Product Description.....................................................................................................................................................5
How the V3 Controller is Different from the V2 Controller...........................................................................................6
Intended Use ...............................................................................................................................................................6
Applicability of this Manual..........................................................................................................................................6
Nordson EFD Product Safety Statement ........................................................................................................................7
Specifications..................................................................................................................................................................8
Standards........................................................................................................................................................................9
Operating Features........................................................................................................................................................10
Front Panel Components...........................................................................................................................................10
Back Panel Components ...........................................................................................................................................11
Installation .....................................................................................................................................................................12
Unpack and Inspect...................................................................................................................................................12
Make the System Connections..................................................................................................................................12
Connector Pin Assignments and Signal Levels.........................................................................................................13
Power Supply Socket Pins.....................................................................................................................................13
CAN Interface D-Subconnector Pins .....................................................................................................................13
Channels 1–4 D-Subconnector Pins......................................................................................................................13
Installation Example...................................................................................................................................................15
Setup .............................................................................................................................................................................16
Design and Interfaces................................................................................................................................................16
Signal Level Sources .................................................................................................................................................17
Device-Internal Potential ........................................................................................................................................18
External Potential ...................................................................................................................................................18
Output Impulses ........................................................................................................................................................19
Fieldbus Communication via CAN Interface..............................................................................................................21
Network Installation ...................................................................................................................................................21
The CAN Data Telegram............................................................................................................................................22
Structure of the 11-Bit Identifier.............................................................................................................................22
Structure of Data Bytes 0–7...................................................................................................................................22
CAN Communication Command Examples...........................................................................................................24
About Local Service Flags .........................................................................................................................................28
About the Transaction Number (TAN)........................................................................................................................28
PICO Controller Menu Structure................................................................................................................................29
PICO Controller Display.............................................................................................................................................30
PICO Controller Operating Controls ..........................................................................................................................31
Parameters and Value Ranges ..................................................................................................................................32
PICO Controller Menu Schematic .............................................................................................................................34
Control Programs ......................................................................................................................................................38
Program Cycles, Program Files, and Factory Settings ..........................................................................................38
Characteristics of a Control Program ....................................................................................................................40
Program Examples.................................................................................................................................................41
Operation.......................................................................................................................................................................44
Checklist for Initial Operation ....................................................................................................................................44
Changing the Temperature Setting Range ................................................................................................................45
Purging a Valve..........................................................................................................................................................45
Changing a Container................................................................................................................................................46
EMERGENCY OFF Functionality ...............................................................................................................................47
Service...........................................................................................................................................................................48
Maintenance ..............................................................................................................................................................48
Cleaning.....................................................................................................................................................................48
Replacing the Battery ................................................................................................................................................49
Part Numbers ................................................................................................................................................................49
Replacement Parts........................................................................................................................................................49
Troubleshooting ............................................................................................................................................................50
Technical Data...............................................................................................................................................................52
Circuit Diagram (Device Internal Potential) ................................................................................................................52
Circuit Diagram (External Potential)...........................................................................................................................53
PICO Controller Dimensions......................................................................................................................................54
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Contents

Contents (continued)
Product Description ......................................................................................................................................................55
Applicability of this Supplement....................................................................................................................................56
PROFIBUS Communicator Specifications ....................................................................................................................57
PROFIBUS Communicator Standards ..........................................................................................................................57
PROFIBUS Communicator Operating Features............................................................................................................58
PROFIBUS Communicator Installation .........................................................................................................................59
Inspect Kit Components............................................................................................................................................59
Make the System Connections..................................................................................................................................59
Installation Examples.................................................................................................................................................60
PROFIBUS Interface D-Subconnector Pins ..............................................................................................................63
PROFIBUS Communicator Status LED Indications...................................................................................................63
PROFIBUS Communicator Setup .................................................................................................................................64
Applicability of this Section .......................................................................................................................................64
Parameterization of the PICO Controller Via the PROFIBUS Communicator ...........................................................64
Organization of the Bus System/Parameterization ................................................................................................64
Integrating the Communicator in a Siemens S7 Project........................................................................................65
Siemens S7 Project Description ................................................................................................................................70
Overview of the Applied Data and Function Blocks ..............................................................................................70
Low-Level Drivers FB15 and FB16 ........................................................................................................................71
Function Block FB20..............................................................................................................................................72
High-Level Driver FB19 .........................................................................................................................................74
Important Information About PLC Blocks ..............................................................................................................75
Using FB20 to Write a Parameter ..........................................................................................................................75
Using FB20 to Read a Parameter ..........................................................................................................................76
Using FB20 to Initiate Dispensing..........................................................................................................................77
Using FB19 to Simultaneously Write Multiple Parameters ....................................................................................78
Value Codes and Admissible Value Ranges ..........................................................................................................79
Essential Addresses and Address Content............................................................................................................80
PROFIBUS Communicator Part Numbers ....................................................................................................................82
PROFIBUS Communicator Replacement Parts ............................................................................................................82
PROFIBUS Communicator Troubleshooting.................................................................................................................82
Supplement for the PICO Controller V3 Kit with PROFIBUS Communicator
PICO Controller 2+2-XCH-V3
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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.
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Applicability of this Manual
This operating manual applies only to the PICO controller V3 2CH/4CH (hereafter referred to only as the PICO
controller) as of
• Hardware release 2.x and software release 3.x, with activated fieldbus parameterization
The current software and hardware versions are shown under the
PICO controller’s System Data menu option.
A PICO controller with activated fieldbus parameterization can be identified as
follows:
• The PICO controller has a “Fieldbus READY” label above the display
• When switched on, an “F” is present in the upper right corner of the display.
Introduction (continued)
How the V3 Controller is Different from the V2 Controller
• Dispensing parameters can be changed more easily via the menu on the V3 controller.
• Spanish has been added to the Language options menu.
• The V3 provides improved connection to higher-level PLCs or a PC through a fieldbus communication interface
(via CAN bus). The fieldbus communication interface provides the following benefits:
- Allows direct writing/changing/reading of all parameters via PLC/PC
- Protects the V3 controller parameters from being changed locally at the controller by using the controller keys. In
other words, Local Service can be blocked through the PLC/PC.
• The SD card included in the scope of delivery contains the following files:
- An empty TXT file template that can be parameterized using a PC
- Two program files that allow you to switch the Temperature setting range between 0–100°C and 0–200°C (refer to
“Changing the Temperature Setting Range” on page45 for more information)
• The CAN communication protocol of the V2 controller is no longer supported, but the CAN functionality of the V2
controller is included in the V3 CAN protocol.
Intended Use
The electrical devices and machines described in this manual are intended for use in industrial systems.
The PICO controller is designed for operation via direct current of 24 VDC.
To ensure that the equipment functions properly, has a long service life, and complies with the intended use, the
operating conditions and instructions specified in this manual must be observed.
PICO Controller 2+2-XCH-V3
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Nordson EFD Product Safety Statement
Only qualified and trained personnel may work with the unit.
CAUTION
NOTE: Qualified personnel are persons who, due to their training, experience and instruction, as well as their
knowledge of relevant standards, provisions, accident prevention regulations and operating conditions, have been
authorized by the person responsible for the safety of the system to perform the required tasks and, in the process,
can identify and prevent potential risks (definitions for specialists according to VDE 105 or ICE364).
Equipment must be unplugged from voltage before any maintenance or repair work is performed. This applies
particularly to connecting and disconnecting cables to the PICO controller for maintenance and repair, or to prepare
for and perform maintenance and repair.
General engineering rules apply for the planning of use of the equipment.
The device should be installed such that the electrical interfaces are easily accessible and the operating and display
elements clearly visible.
The PICO controller has been designed with state-of-the-art technology and is reliable and safe to operate. Incorrect
handling by insufficiently qualified personnel can be hazardous. It is imperative that operating personnel be properly
trained.
CAUTION
To ensure safety, repairs and hardware changes to the unit may be made only by the manufacturer.
CAUTION
The PICO controller may be used only to control the PICO Toµch controller or an approved 24 V valve from Nordson
EFD. The operating conditions and parameters specified by the manufacturer and included in this manual should be
complied with.
Failure to comply with the safety instructions can result in a limitation or complete loss of liability on the part of the
manufacturer. This also applies to equipment and accessories that have been acquired from another party.
PICO Controller 2+2-XCH-V3
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Specifications
Enclosure
Material Plug-in cassette for 19-in. chassis; aluminum, anodized black
Dimensions (W x H x D) 142Wx 129Hx 171Dmm (3HE, 28 TE)
(5.6Wx 5.1Hx 6.7D")
Weight Approx. 1.5 kg (3.3 lb)
Operating temperature +5 to 50 °C (41 to 122 °F)
Storage temperature -20 to 70 °C (-4 to 158 °F)
Relative humidity, operation Maximum 80%
Relative humidity, storage Maximum 90%
Degree of protection IP20
Operating position Display in the front, sockets easily accessible
Electrical Data
Voltage supply 24 VDC ±10%
Power consumption 2-channel PICO controller: maximum 1.7 W (without load)
4-channel PICO controller: maximum 2.5 W (without load)
Electrical Connections
Voltage supply 4-pin male connector on the back panel
Inputs/outputs per channel 25-pin D-subconnector for each channel
CAN interface 9-pin D-subconnector, option for communicating with primary control device
Update interface 8-pin receptacle for software update
Operation
Nominal operating mode Continuous operation
Operation Operating menu in four languages (German, English, French, Spanish)
Manual input of parameters Via one dial and two operating keys
Display Graphic display, blue/white, 128 x 64 pixels
Data storage Non-volatile storage (EEPROM and flash storage); SD card
Signals
Pulse height Approx. 24 VDC
Time ranges Individually assigned by line and channel
Dispensing time Pulse duration: 0.05 to 9999.99 ms ±5 µs per pulse (increments of 10 µs)
Cycle duration: 0.17 to 9999.99 ms ±5 µs per cycle (increments of 10 µs)
Number of channels 2 (optionally 4) output channels, independent of one another
Status display 1 green LED per channel
Input Signals/Channels
1 analog input 0–10 V; for variable pause times (times between 0 and delay time; delay time = 0.12 to 9999.99 ms)
10 binary input signals To activate one pulse-pause line (or block) each
Stop/emergency off Immediate cancellation of current dispensing sequence
Temp. dispensing fluid Status when temperature limit for dispensing fluid is reached (signal from PICO Toµch controller to
primary control unit)
Dispensing sequence fault Alarm when fault in dispensing process sequence occurs (signal from PICO Toµch controller to
primary control unit)
Input impedances Per analog input: Ri > 300 kOhm
Per binary input: Ri > 5.3 kOhm
Logic levels of binary inputs L = 0–5 V
H = 12–30 V
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Standards
• The PICO controller is intended to be operated with 24 VDC and complies with EMC guideline 2014/30/EU-EMV/
EMC/CEM.
• The unit has the CE mark of conformity.
• The unit was inspected pursuant to the environmental testing method IEC 68.
Specifications (continued)
Output Signals/Channels
Pulse-pause outputs Electrical 24 V impulses to control dispensing sequences
System ready 0 V = not ready, 24 V = ready
End of pulse sequence 24 V pulse, duration 100 ms
Temp. dispensing fluid 24 V = fluid temperature okay, 0 V = fluid temperature not reached or exceeded
Dispensing sequence fault 24 V = normal, 0 V = dispensing sequence fault (container limit reached upon level check or
faulty/missing PICO Toµch controller)
Analog output Temperature (0–5 V for 0–100 ºC or 0–10 V for 0–200 ºC can be configured) setpoint for the fluid
Output load Per pulse output: max. 2 W (80 mA)
Per analog output: max. 10 mA
Per other output: max. 0.5 W (20 mA)
PICO Controller 2+2-XCH-V3
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Operating Features
Front Panel Components
[Dimensions W x H = approx. 142 x 129 mm (5.6 x 5.0 in.)]
SD card slot Status LEDs
(green) for
Channels 1–4
ESC (Escape)
key Menu dial with
integral Enter key
POWER switch/
supply voltage
| = ON
0 = OFF
Four outer M3 hexagon
screws for mounting the
front plate to the housing
Display Four captive screws for
mounting the PICO controller
on an electrical cabinet
Fieldbus READY
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Connection Comment
Power supply 4-pin socket (Binder, series 680) for power supply cable
Channels 1 to 4 One 25-pin D-subconnector per channel to connect the signals needed to control dispensing.
Channels 1 and 2 are standard; Channels 3 and 4 can be added if desired; the ducts for Channels
3 and 4 are ready and are covered with a label.
CAN bus 9-pin D-subconnector for optional connection of a higher-ranking control unit with CAN bus
communication
Update interface 8-pin socket (Binder, series 581) for Nordson EFD use only
Back Panel Components
[Dimensions W x H = approx. 138 x 106 mm (5.4 x 4.2 in.)]
Rating
plate
Connector
(Nordson EFD
use only)
Socket for power
supply cable
Refer to “Connector Pin
Assignments and Signal
Levels” on page13 for
detailed information.
D-subconnectors for
Channels 3 and 4 (if
present)
D-subconnector for
CAN bus cable
Refer to “Connector Pin
Assignments and Signal
Levels” on page13 for
detailed information.
D-subconnectors for
Channels 1 and 2
Refer to “Connector Pin
Assignments and Signal Levels”
on page13 for detailed
information.
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Installation
Unpack and Inspect
After unpacking the equipment, check that the scope of delivery is complete and that your operating conditions
comply with the information on the rating plate. The scope of delivery includes:
• One PICO controller V3
• One SD memory card with files
• One 2 m PICO controller power supply cable (P/N 7027455)
• One “PICO Controller V3 Operating Manual” on CD-ROM
Make the System Connections
Prior to conducting work on the system, ensure that running processes will not be interrupted. If necessary, turn off
the system. Only qualified and trained personnel may perform work on the system.
CAUTION
1. Turn off devices/systems/processes to avoid interrupting running processes.
2. Refer to the PICO Toµch controller operating manual to connect the valve(s) to the PICO Toµch controller.
3. Create a hardwire connection between the PICO controller and the PICO Toµch controller (Y-connection
cable, P/Ns 7028222 and 7012975). Refer to “Connector Pin Assignments and Signal Levels” on page13 for
connection details.
4. (Optional) Establish the fieldbus connection using the CAN cable. Refer to “Connector Pin Assignments and
Signal Levels” on page13 for connection details.
5. Establish the power supplies to the PICO controller (cable P/N 7027455) and the PICO Toµch controller (refer to
the PICO Toµch controller operating manual if needed).
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Connector Pin Assignments and Signal Levels
Channels 1–4 D-Subconnector Pins
NOTES:
• Each channel of the PICO controller has an associated 25-pin D-subconnector. The Y-connection cable (P/Ns
7028222 and 7012975) is normally used to connect the PICO controller/PICO Toµch controller to the PLC.
• The IN1 to IN10 and IN_STOP input signals are used to control the channel output signals (pulse-pause blocks).
These input signals can be generated by switches (hand or foot switch, limit switch, relay, light barrier, etc.) or by
electronic control devices (PLC or similar).
• A semi-conductor relay must be used to receive a clear, bounce-free signal.
• The terms input and output in the following table refer to the connections on the Y-connection cable (P/Ns
7028222 and 7012975).
Power Supply Socket Pins
CAN Interface D-Subconnector Pins
Through a CAN interface, the PICO controller can communicate with a primary device via the CAN bus. Without
communication, the unit operates autonomously.
Pin No. Signal Name Description
1 No assignment —
2 CAN_LOW Data line
3 CAN GND CAN reference potential
4 No assignment —
5 Housing, CAN cable shield —
6 No assignment —
7 CAN_HIGH Data line
8 No assignment —
9 No assignment —
Pin No. Signal Name Description
1 +24 V Operating voltage +24 VDC
2 No assignment —
3 No assignment —
4 GND Reference potential of the
operating voltage
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NOTES (about channel interfaces):
• Dispensing can be started only when high level (+12 to +30 V) is on pin 17. If the EMERGENCY OFF feature is
activated, the high level must also be on pin 15.
• Pins can be connected for tests without a PICO Toµch controller:
Pins 1 and 2: Elimination of galvanic isolation
Pins 3, 4, (15), and 17: Use of the internal potential and simulation of fault-free operation
Pin Signal Level Comment
Inputs
1 DGND 0 V Internal reference potential
2 GND_IO 0 V Reference potential for inputs and outputs
4 24 V_IO External supply of +24 V for the outputs
5 IN1 0 V/24 V To activate a block (reference GND_IO)
6 IN2 0 V/24 V To activate a block (reference GND_IO)
7 IN3 0 V/24 V To activate a block (reference GND_IO)
8 IN4 0 V/24 V To activate a block (reference GND_IO)
9 IN5 0 V/24 V To activate a block (reference GND_IO)
10 IN6 0 V/24 V To activate a block (reference GND_IO)
11 IN7 0 V/24 V To activate a block (reference GND_IO)
12 IN8 0 V/24 V To activate a block (reference GND_IO)
13 IN9 0 V/24 V To activate a block (reference GND_IO)
14 IN10 0 V/24 V To activate a block (reference GND_IO)
15 IN_STOP 0 V/24 V Emergency off: 24 V = unit ready 0 V = unit stopped
16* (0 V/24 V) Internal use [IN_TEMP_PLC]
17* (0 V/24 V) Internal use [IN_FAULT_PLC]
18 IN_ANALOG 0–10 V To control the pause time assigned between 0.12 ms and the delay time
(reference DGND)
25 DGND 0 V Internal reference potential
Outputs
3 24 V 24 V Unit’s internal 24 V supply is threaded out of the unit to be used as potential
for the binary inputs/outputs
19 OUT_READY 0 V/24 V
max. 20 mA Message indicating channel readiness (reference GND_IO); 24 V = Ready
20 OUT_LINE_END 0 V/24 V
max. 20 mA
Message indicating end of pulse output in the channel with 24 V/100 ms
(reference GND_IO)
21 OUT_TEMP_PLC 0 V/24 V
max. 20 mA
Status output temperature, comparison of actual and setpoint temperature of
valve;
24 V = Temp OK (reference GND_IO)
22 OUT_FAULT_PLC 0 V/24 V
max. 20 mA
Status output faults. Following functions are checked:
- Valve connection (ENA)
- Drive voltage
- Heater (short-circuit/broken cable)
- Temperature sensor (short-circuit/broken cable)
- Over-temperature
- Level check reached
24 V = OK, 0 V = fault
23 OUT_ANALOG 0–5/10 V
max. 10 mA
0–5 or 0–10 V analog output to specify the temperature to the PICO Toµch
controller; adjustable with software switch
24 PULS_OUT 0 V/24 V
max. 80 mA Output signal pulse-pause block (reference DGND) to PICO Toµch controller
*Pins 16 and 17: Do not connect externally.
Channels 1–4 D-Subconnector Pins (continued)
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Installation Example
The following diagram shows a system with 1 PICO controller, 2 PICO Toµch controllers, and 2 valves connected
to a PLC via CAN and HMI. The diagram also provides an example of how cable P/Ns 7012975/7028222 can be
configured.
Cable P/N 7012975 Cable P/N 7028222
PICO Toµch controllers and Pµlse valves
PICO
Controller V3,
2 channel
Binary path to/from robot
CAN path
Robot
Digital input/output Controller with CAN Analog input Power supply
PLC platform
with CAN
CAN
Cable 7028222 (x2)
HMI cable
CAN cable
Cable 7028222 and cable to/from robot
HMI
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Design and Interfaces
Setup
The PICO controller has the interfaces shown in the diagram above. Optional Channels 3 and 4 can be added later
with a plug-in card. When controlling with the PLC, it is advisable to supply the binary communication signals with
the external PLC operating voltage galvanically isolated from the PICO controller (refer to the circuit diagrams under
“Technical Data” on page52).
The PICO controller works on the basis of a microprocessor. Parameters are set using an ASCII TXT file and
SD card or by using the fieldbus communication interface. Parameters can also be adjusted locally on the PICO
controller (within set limits ) by using the Menu dial and the Enter and ESC (escape) keys on the front of the unit. The
display shows the current values.
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Input level Low 0 to + 5 V High +12 to +30 V
Affects IN1 to IN10 IN1 to IN10 not active IN1 to IN10 is activated
Affects IN_STOP IN_STOP active IN_STOP not active
= emergency off = no emergency off
Output level 0 V 24 V
Meaning of 0 V = controller not ready 24 V = controller ready
OUT_READY for start pulse or
start command
Meaning of
OUT_LINE_END 0 V = pulse output active 24 V pulse, duration 100 ms
= end of pulse output
Signal comes after last programmed pause time
OUT_TEMP_PLC 0 V = fluid temperature 24 V = fluid temperature reached
not reached
OUT_FAULT_PLC 0 V = process fault (check 24 V = process normal
PICO Toµch controller)
PULS_Out signal 0 V = no dispensing 24 V = dispensing sequence active
channels 1–4 sequence
Signal Level Sources
The signal levels/potentials of the binary input and output signals can be provided by the internal power supply of
the PICO controller or by a separate source (PLC, power supply unit, or similar device).
The switch stages of the binary input and output signals of the PICO controller are galvanically isolated from the
power supply at the factory. Depending on which source of potential is chosen, the following instructions must be
complied with when connecting to the 25-pin D-subconnector (Channels 1 to 4).
The following signal levels apply to the input and output signals.
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Device-Internal Potential
Use
Internal potential is provided by the PICO controller power supply. This version is used primarily when potential-free
switches and keys are used to activate the pulse sequences.
Action required for device-internal potential
NOTE: Refer to “Circuit Diagram (Device Internal Potential)” on page52.
To internally connect the potential, the following electrical points must be connected in the 25-pin D-subconnectors
for the respective channels:
DGND and GND_IO points (meaning connecting PIN 1 and 2) as well as
24 V and 24 V_IO points (meaning connecting PIN 3 and 4).
This eliminates galvanic isolation of the individual switch stages.
The 24 V potential is applied to make contacts (IN1 to IN10) and break contacts (IN_STOP) and, after actuation of
these switches, triggers the respective activations (start a pulse sequence or emergency off).
With this application, the output signals can be used, for example, as optical or acoustic indications to the operator.
The maximum load capacity of the outputs must be complied with (refer to “Specifications” on page8).
External Potential
Use
Separate potential is used primarily when the controlling device has its own power supply (PLC, control electronics,
etc.) and the inputs IN1 to IN10 as well as IN_STOP are triggered directly by binary signals. An electrical connection
should be established between the external voltage supply and the input and output stages of the PICO controller
for this purpose.
Action required for external potential
NOTE: Refer to “Circuit Diagram (External Potential)” on page53.
• 24 V_IO and GND_IO should be connected to the respective terminals of the external voltage supply.
• Input signals IN1 to IN10 should still be triggered directly.
• With this application, output signals OUT_READY and OUT_LINE_END serve primarily as acknowledgement for
the control program.
PICO Controller 2+2-XCH-V3
18 www.nordsonefd.com [email protected] [phone] Sales and service of Nordson EFD dispensing systems are available worldwide.

Output Impulses
Each channel has its own section in the program memory. A program for a dispensing sequence consists of 1to 99
lines. The lines and blocks are compiled with a text editor for each channel on a PC as a .txt file. They are buffered
on an SD card and then loaded into the memory of the PICO controller. Alternatively, the lines and blocks can be
programmed via fieldbus communication. A pulse-pause block is started with binary input signals IN1 to IN10 or
manually via the operating menu. Up to 99 pulse-pause lines can be started via fieldbus communication.
Pulse Pause Lines
• A pulse time can be 0 or at least 0.05 ms.
• A pause time can be 0 or least 0.12 ms.
• A continuous signal (continuous dispensing) can be programmed when the pause time is 0 ms. This enables an
uninterrupted line or a bead to be applied.
When the pause time parameter is set to “v,” the pause between two pulses can be changed during dispensing via
the IN_ANALOG 0–10 V external analog input signal on pin 18. Simultaneously, the value for Delay-Time must be
set in the TXT file or via fieldbus communication. Delay-Time is then the maximum possible pause time with 10 V
applied. The minimum pause time is achieved with 0 V and is 0.12 ms.
A constant drop interval at an alternating speed can be achieved with variable pause time.
The general course of a pulse-pause line is shown in the following illustration. The variables for a pulse-pause line
(= “line”) are dosing time, pause time, and number of pulses. To make fine adjustments easier, Cycle is set (at the
controller) instead of pause time. The pulse height is a steady +24 VDC; it cannot be modified.
A line can be activated individually or can be linked to a block.
Up to 99 different pulse-pause lines can be stored in the program memory of the PICO controller. A line is started
with a binary input signal, IN1 to IN10, passively by linking it to a previous line or by activating through the Manual
Mode menu option or by using fieldbus communication.
General momentum diagram for a pulse-pause-line (a line consists of 1 to 999 pulse-pause cycles).
Amplitude (V)
Start of the line/row
Start of a new
pulse interval
cycle
Cycle = Dosing Time + Pause Time
Time (t)
Pause Time
Dosing Time =
Pulse Time
PICO Controller 2+2-XCH-V3
19www.nordsonefd.com [email protected] [phone] Sales and service of Nordson EFD dispensing systems are available worldwide.

Pulse-Pause Blocks
A block of 2 to 99 pulse-pause lines is referred to as a pulse-pause block. A delay of 0 to 9.999 seconds (in
increments of 1 ms) can be inserted between two lines that are to be linked.
A block is started for each channel with binary signal IN1 to IN 10, through the PICO controller menu, or by using
fieldbus communication.
When lines are linked, the completed line activates the next (linked) line without an additional start signal (passive
activation). Infinite loops can also be programmed.
An infinite loop can be interrupted only with the signal IN_STOP or, in manual mode, with ESC. Always test
thoroughly.
CAUTION
Binary signals (start signals) can be generated by key, by hand, foot, or limit switches, or by a PLC, industrial PC,
etc. The binary signal (INx) that is to trigger the start of a line must be specified in the line program. The following
momentum diagram shows an example of a pulse-pause block consisting of three linked lines.
The block shown in Example 1 consists of three lines with different constant pulse and pause times as well as a
different number of impulse cycles per line. Line 1 is started with input signal IN1 to IN10. Linked lines 2 and 3 are
started after completion of the previous line. A delay was inserted between lines 1 and 2 as well as between lines 2
and 3.
A delay between 0 and 9.999 ms can be selected.
Amplitude (V)
Start of the block with an input signal
Time (t)
End of the bock
Example—Pulse-pause block with three lines/rows.
Row 1
(8 cycles)
Row 2
(6 cycles)
Row 3
(4 cycles)
Delay
time 2
Delay
time 1
Pulse 1 Pause 1 Pause 2Pulse 2 Pause 3
Pulse 3
PICO Controller 2+2-XCH-V3
20 www.nordsonefd.com [email protected] [phone] Sales and service of Nordson EFD dispensing systems are available worldwide.