LINK Systems Microlink User Manual

MicroLink

OPERATOR TERMINAL

SETUP AND OPERATION

MANUAL

(Revision 1.0)

LINK ELECTRIC & SAFETY CONTROL COMPANY
444 McNALLY DRIVE, NASHVILLE TN 37211
PH (615)-833-4168 FAX [phone]

www.linkelectric.com

Table of Contents

1. INTRODUCTION ...............................................................1-1

2. BASIC MICROLINK INTERFACE.................................................2-1

2.1 Number Keys ............................................................2-1

2.2 Arrow Keys .............................................................2-1

2.3 CLEAR Key .............................................................2-1

2.4 ENTER Key ............................................................. 2-1

2.5 EXIT Key ...............................................................2-1

2.6 DOWN TIME CODE Key ..................................................2-1

2.7 HELP Key ..............................................................2-2

2.8 Contrast Key - ..........................................................2-2

2.9 RUN/PROG Key Switch ................................................... 2-2

2.10 Soft Keys ..............................................................2-2

2.11 Method of Editing Text ..................................................2-2

2.12 Menu Tree ............................................................ 2-3

3. INSTALLATION ...............................................................3-1

3.1 Mounting the MicroLink Unit ...............................................3-1

3.2. Wiring the MicroLink Unit .................................................3-3

4. CONFIGURATION.............................................................. 4-1

5. OPERATION...................................................................5-1

5.1 Counters ................................................................5-1

5.1.1 Part Counter .....................................................5-2

5.1.2 Batch Counter .................................................... 5-2

5.1.3 Quality Counter ...................................................5-2

5.1.4 Scrap Counter .................................................... 5-2

5.1.5 Stroke Counter ...................................................5-2

5.2 Job Storage and Recall .....................................................5-2

5.2.1 Store Job ........................................................ 5-3

5.2.2 Recall Job ....................................................... 5-3

5.2.3 Erase Job ........................................................5-3

5.2.4 LinkNet: Job Storage and Recall ..................................... 5-4

5.3 Auxiliary Equipment Support ...............................................5-4

6. ACCESS CODES ...............................................................6-1

6.1 Access Code Screen .......................................................6-1

6.2 Functional Modes of the RUN\PROG Key .....................................6-1

6.2.1 RUN/PROG Key Exclusive Mode .................................... 6-2

6.2.2 RUN/PROG Key Required Mode .....................................6-2

6.2.3 RUN/PROG Key Not Required Mode .................................6-2

6.2.4 RUN/PROG Key Accesses All Mode ..................................6-2

6.3 Access Timeout ..........................................................6-3

6.4 User Description ......................................................... 6-3

6.4.1 User Configuration: User ...........................................6-3

6.4.2 User Configuration: Code ........................................... 6-3

6.4.3 User Configuration: Used ..........................................6-3

i

6.4.4 User Configuration: Permissions .....................................6-4

7. DIAGNOSTICS ................................................................. 7-1

APPENDIX A. INSTALLATION OF MICROLINK FIRMWARE.......................... A-1

APPENDIX B. ELECTRICAL SPECIFICATIONS ......................................B-1

B.1 MicroLink / MultiSet Enclosure .............................................B-1

B.2 801-1 MicroLink Logic Board ..............................................B-1

B.3 801-3 Air System Control Board ............................................B-1

B.4 801-4 Rotary Shut Height Control Board ......................................B-1

B.5 801-5 Linear Shut Height Control Board ......................................B-1

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List Of Figures

Figure 1.1: MicroLink Keypad and MultiSet Operational Screen ............................1-1

Figure 2.1: Editing Text on Job Storage Screen..........................................2-2

Figure 2.2: Menu-Tree of the MicroLink Operational Screens .............................. 2-3

Figure 3.1: Dimensional Drawing for Panel Mount of MicroLink Enclosure ...................3-1

Figure 3.2: Dimensional Drawing of Remote Mount Enclosure (Hinge on Lower Edge) ..........3-2

Figure 3.3: Wiring Connections Inside the MicroLink Unit ................................3-3

Figure 4.1: OIT Configuration Screen ................................................. 4-1

Figure 4.2: Communications Setup Screen..............................................4-2

Figure 5.1: Main Options Screen .....................................................5-1

Figure 5.2: MicroLink Counters Screen ................................................5-1

Figure 5.3: Job Setups Screen........................................................ 5-3

Figure 5.4: MicroLink Job Recall Screen...............................................5-3

Figure 5.5: MicroLink Job Erase Screen ............................................... 5-4

Figure 5.6: MicroLink Feed Interface Screen ............................................5-4

Figure 6.1: Access Code Screen......................................................6-1

Figure 6.2: Access Code Configuration Screen .......................................... 6-3

Figure 7.1: OIT Diagnostic Screen .................................................... 7-1

Figure A.1: Mounting Screws on Plug on Board ........................................ A-1

Figure A.2: Location and Orientation of Firmware ...................................... A-1

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MicroLink: Operator Interface Terminal

1. INTRODUCTION

The Link Systems MicroLink unit is a machine to
operator interface terminal that is used as a
convenient method of controlling some metal
forming press functions. The MicroLink system
can be used to interface with feeds, connect to the
LinkNet networking system, or perform
counterbalance/die cushion and slide adjust
control with the MultiSet module.

The MicroLink system consists of a 16 line, black
on white LCD (liquid crystal display), a numeric
keypad, along with the circuit boards and software
that form the core of the system. The MicroLink
system has the on-board memory for job storage
of up to 250 jobs. The system has built-in network
connections for the LinkNet press networking
system, which provides virtually unlimited job
storage, user defined downtime codes,
maintenance tracking, and other benefits.

to move through the different screens of the
MicroLink system easily. The HELP key on the
keyboard provides instant access to helpful
information tailored for most user screens. The
system also has a special diagnostics section with
information about the status of the hardware.
When the MicroLink system asserts a stop output,
a section of the screen shows that the stop is
active. This enables the user to quickly determine
if the MicroLink system has stopped the press, so
the problem can quickly be isolated and the press
can be returned to normal production.

The MicroLink system can utilize access codes
assigned by a supervisor to control the ability of
different users to make changes to set points,
configuration data, and other critical information.
If a user does not have the correct user code, then
no changes can be made. The access code system
can be bypassed in facilities that would not
benefit from this flexibility.

The software for the MicroLink system includes
counters for part, batch, quality, and stroke as
well as a method for counting scrap parts and
deducting them from the part count. The intuitive
screens use menus with soft keys that enable users

All of these features combine to make the
MicroLink system easy to use. The overall
advantage is more efficient use of press auxiliary
systems, which results in better press utilization.

Figure 1.1: MicroLink Keypad and MultiSet Operational Screen

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MicroLink: Operator Interface Terminal

2. BASIC MICROLINK INTERFACE

The MicroLink system is designed to facilitate the
operation of the press to which it is attached. The
operator terminal has the job of conveying
information to the user and providing a method of
entering information in the system. The operator
terminal has 25 keys that allow the user to enter
information. The 20 keys on the right side of the
MicroLink operator terminal are labeled and have
dedicated functions. The 5 keys next to the liquid
crystal display (LCD) are special keys that change
their functions for different screens. The functions
of these 5 keys are defined in software, instead of
hardware, so the keys are called soft keys.

Another central aspect of the MicroLink interface
is the usage of multiple screens. A screen consists
of the information displayed on the LCD for a
particular sub-system. For instance, the MultiSet
system has a screen that shows the current air
pressure and the current shut height, as well as
information about the system set points and
system faults. The screens are arranged in a menu
tree, which is described in more detail in Section

2.12. The keys on the MicroLink operator
terminal are described in the following sections.
The keypad layout is shown in Figure 1.1.

mode, so the arrow keys are only effective in edit
mode. The arrow keys will not change anything
when the cursor is not present unless they are
used with the CONTRAST key (Section 2.8).

2.3 CLEAR Key

The CLEAR key is used to erase an entered
number when an edit field is being modified. The
MicroLink system allows a user to change
numeric values using the number keys (see
Section 2.1). The CLEAR key enables the user to
erase incorrect numbers that were entered and
start again.

2.4 ENTER Key

The ENTER key is typically used to tell the
MicroLink system that an editing process is
complete. When a number is being changed, such
as the shut height set point, pressing the ENTER
key indicates that the changed number should be
the new set point. The ENTER key is also used to
select an option from a list of choices. Use the
arrow keys to position the cursor on the desired
option and press the ENTER key.

2.5 EXIT Key

2.1 Number Keys

The ten number keys on the keypad enable the
user to easily enter numeric values such as set
points, limits, and job numbers. The number keys
are only active when the system is in edit mode.
When the system is in edit mode there will be a
blinking cursor on the screen, which means that
the system is ready to accept data. If the item
being changed is a number, then a new value can
be entered by pressing the appropriate numbers on
the keypad. When the system is not in edit mode,
pressing the number keys will not change
anything.

2.2 Arrow Keys

The arrow keys are primarily used to move the
blinking cursor to different parts of the screen.
The cursor is only present when the user is in edit

The EXIT key is used for two primary functions.
One function is to leave an edit field, and the
other function is to leave a screen. Pressing the

EXIT key while changing a number, such as the

shut height set point, will end the edit process and
return the set point to the value that was there
before the edit process began. If the user is not
changing a value, then pressing the EXIT key will
cause the MicroLink system to leave that screen.

2.6 DOWN TIME CODE Key

DOWN TIME CODE key brings up a special

The
screen dedicated to entering down time codes
over a LinkNet connection. This special screen is
covered in full detail in the LinkNet manual. If the
LinkNet press networking system is not installed,
then pressing this key will bring up a message that
says “Network NOT on line”. Press the
to return to the previous screen.

EXIT key

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MicroLink: Operator Interface Terminal

2.7 HELP Key

The HELP key brings up a special screen that
explains some of the information about the
system. This information is tailored to match the
screen that the user is viewing when the
key is pressed. Press the EXIT key to return to the
normal user screen.

2.8 Contrast Key -

The contrast key is primarily used to adjust the
background intensity of the liquid crystal display
(LCD). In some situations the user may want to
make the background brighter. This is
accomplished by holding down the contrast key
and the up arrow key simultaneously. Conversely,
to make the background darker, hold down the
contrast key and the down arrow key
simultaneously.

The contrast key has a second function related to
access codes. Pressing the contrast key while in
an access protected mode will cause the system to
immediately leave the protected mode (log out).
This special function is explained in more detail
in the access code timeout section. (Section 6.3).

HELP

One usage of soft keys is for screen navigation. If
the text on the display next to a soft key is a
screen name, then pressing that soft key will pull
up that screen. For instance, pressing the soft key
next to the label that says Counter will bring up
the screen with the counter information.

Another usage of soft keys is for performing
certain screen related tasks, such as Change

Number, Store Job

cause the system to perform the action described
by the text beside the soft key. The action soft
keys are described in detail with each screen
description throughout the manuals.

2.11 Method of Editing Text

The MicroLink keypad is designed to maximize
ease of use while minimizing size and clutter, so
there are no letter keys on the keypad. The system
uses an on-screen letter selection window and the
5 soft keys to edit text. The primary usage of the
edit text system is creating descriptions for job
data before it is stored. The screen in Figure 2.1
shows the edit text system for editing a job
description.

, or Jog Up. These soft keys

2.9 RUN/PROG Key Switch

The RUN/PROG key switch located below the
keypad is used to limit the ability of unauthorized
personnel to change parameters. The key must be
in the program (PROG) position in order to make
most changes to the system. The exact
functionality of the RUN/PROG key switch can
be affected by Access Codes, which are covered
in detail in Chapter 6.

2.10 Soft Keys

The remaining 5 keys on the keypad are called
soft keys. The soft keys are solid grey and are
located in a single column beside the screen. The
function of a soft key is described by the text
written on the screen next to the soft key. If the
area of the screen next to a particular soft key is
blank, then that soft key does nothing on that
screen.

Figure 2.1: Editing Text on Job Storage Screen

The letters are selected by using the arrow keys
on the keypad to position the pointer arrow
beneath the desired letter. When the pointer arrow
is in position, press the Select Letter soft key. The
selected letter will be added to the text description
where the black cursor is located. The cursor in
the letter description automatically moves to the
next position after a letter has been selected.
Continue to select letters in the same manner. If

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MicroLink: Operator Interface Terminal

you need to leave a blank space in your
description, press the

Left

and Cursor Right soft keys can be used to

Space soft key. The Cursor

position the cursor in the letter description. This is
typically used to go into a description and change
a single letter without entering the entire sequence
of letters again. The Abort Edit soft key will exit
the edit text system without applying any changes.

2.12 Menu Tree

The operation and configuration screens are
arranged in a structure called a menu tree. This
name is used because the structure of the screens
is similar to a tree with a main trunk, large
branches, and smaller branches. The main trunk is
like the main screen of the MicroLink system,
which has screens that are reached when the
appropriate soft key is pressed. These secondary
screens are like the big branches off of the main
trunk in a real tree. Other screens are reached
from these secondary screens by pressing the soft
key that matches the screen name. The screens
branch out in this fashion until all of the relevant
screens for that branch are covered.

The menu-tree for the MicroLink system is shown
in Figure 2.2. Each of the boxes in the figure
represents one of the screens in the MicroLink
system. The lines connecting the boxes show how
the screens are linked. For instance, to bring up
the job recall screen if you are currently in the
MultiSet screen requires three steps. First, press

EXIT key to go up one level to the main

the
screen. Second, press the

Job Setups soft key to

go to the job memory screen. Finally, press the

Recall Job soft key on that screen to go to the job

recall screen.

The HELP screen and the DOWN TIME CODE
screen are not part of the menu-tree screen
structure. They can be accessed from any screen
by pressing the dedicated keys on the keypad. For
instance, press the

HELP key to get to the HELP

screen. The EXIT key returns the system to the
previous screen.

Figure 2.2: Menu-Tree of the MicroLink Operational Screens

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MicroLink: Operator Interface Terminal

3. INSTALLATION

The first step of the installation of the MicroLink
system is the physical mounting of the unit. The
first two sections of this chapter show the
mounting options. After the mounting is
completed, the necessary wiring can be installed.
The basic wiring for the MicroLink system is
covered in the last section of this chapter. The
wiring for the MultiSet system is covered in the
separate MultiSet manual.

3.1 Mounting the MicroLink Unit

There are two mounting options that allow the
user to match the installation of the unit to their
particular application. The unit can be mounted in
a panel or it can be mounted in a separate
enclosure.

The flush mount option allows the system to be
located in a control enclosure with other press
electrical systems. The advantage of this
mounting arrangement is that all of the press
electrical systems can be located in one central
area for easier operation. Another advantage of
this option is that the system can be installed
within a custom made enclosure. The dimensions
for flush mounting the MicroLink system in a
panel are shown in Figure 3.1.

Figure 3.1: Dimensional Drawing for Panel Mount of MicroLink Enclosure

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MicroLink: Operator Interface Terminal

The second mounting option is to install the
MicroLink system in a separate enclosure that can
be purchased from Link Systems. This typically
allows the system to be mounted closer to the
press bed, which helps the user to see the screen
more readily and to more easily use the
information from the unit. The physical
dimensions of this enclosure are shown in Figure

3.2. The MicroLink system mounts in the door of
the enclosure, which is hinged on the lower edge.
When the unit is mounted on the machine,
rubberized shock mounts must be used.

Figure 3.2: Dimensional Drawing of Remote Mount Enclosure (Hinge on Lower Edge)

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MicroLink: Operator Interface Terminal

Figure 3.3: Wiring Connections Inside the MicroLink Unit

3.2. Wiring the MicroLink Unit

After the enclosure has been installed, the
MicroLink system is ready for wiring. The system
uses a single power connection of 115 VAC
inside the enclosure. The power connection inside
the unit should be made as shown in Figure 3.3.
This figure represents the inside of the MicroLink
unit and the three pin connector for the AC power.
Note that high voltage (115 VAC) should be run
in a separate conduit from low voltage DC
signals, such as communication and sensor
connections.

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The MicroLink unit has an optional counter input
that is used only if there is no MultiSet system on
the back access cover. The MultiSet system has a
dedicated “Top” input that performs the function
of the counter input when the MultiSet system is
installed. The input connector inside the
MicroLink unit is the green four-pin connector
next to the black keypad connection. “IN1" on this
connector is used for the RUN/PROG key switch.
The counter input in the MicroLink unit is labeled

“IN2". The wiring connections for “IN2" are

shown in Figure 3.3. This input is only used if
there is no MultiSet unit on the back access cover

MicroLink: Operator Interface Terminal

of the MicroLink system. “IN3" is for future
product expansion and is not currently used.

The other four pin connector in the MicroLink
unit is for the on board relay. If there is no air
adjust or air adjust and slide adjust boards
installed, this relay will function as a stop relay.
When the counter limits are reaches, this relay
will send a stop signal to the press control. There
are two sets of relay contacts available. One set is
normally open. The other set is normally closed.
When used, the stop relay is energized (turned-on)
during run conditions, and de-energized (turned­off) during stop conditions. When the relay is
energized (turned-on), the normally open contacts
are closed and the normally closed contacts are
open.

There are three serial port connections on the
main board and two serial port connections on the
‘piggy-back’ board inside the MicroLink
enclosure. The green connectors with three pins
on the main board are for special purposes, such
as a roll-feed interface, and are covered in a
separate communications manual, called the Feed
Interface manual. One of the five pin connectors
on the ‘piggy-back’ board is reserved for future
applications, the other is a LinkNet connection,
which is covered in the separate LinkNet manual.
Contact Link Systems for more information on
these special purpose serial communication ports.

There are no other wiring connections inside the
MicroLink unit. The MultiSet system is wired into
the connectors on the back access cover of the
unit. Complete installation information for the
MultiSet system is covered in the separate
MultiSet manual.

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MicroLink: Operator Interface Terminal

4. CONFIGURATION

The MicroLink unit has a configuration screen
that allows the supervisor to change some basic
settings. The operator interface terminal (OIT)
configuration screen is reached by pressing the

Diagnos soft key on the main screen, then with

the RUN/PROG key in the program position press
the Config OIT soft key and enter the code. The
code is provided separately from the manual for
administrative control. There are seven settings
that can be changed for the OIT configuration.
There are also four special reset options that erase
parts of the system memory. The OIT
configuration screen looks similar to Figure 4.1.

Figure 4.1: OIT Configuration Screen

Store Ctrs With Job - The first setting on the

screen allows the supervisor to store the current
counter information with each job. If this setting
is enabled, then recalling a job will automatically
set the limit, the quantity, and the state of each of
the counters to the values they held when the job
was saved. This includes the part, batch, quality,
and scrap counters. The stroke counter is not
affected because it is intended to count total
strokes of the machine. See Section 5.1 for more
information on counters. This option is typically
disabled.

Machine Number - The next setting allows the

supervisor to assign a machine number to this
MicroLink unit. The machine number is used for
LinkNet applications. LinkNet identifies each unit
on the press room network with a machine
number. This value is not used for applications
that do not have a LinkNet connection. See the

LinkNet manual for more information.

Date / Time - The correct date and time are

entered like any other value in the MicroLink
system. Position the cursor on the value to be
changed, type the new value, and press the

ENTER key.

Backlight Timeout - This refers to the number of

minutes that the MicroLink system will sit idly
before the backlight in the display automatically
turns itself off. When no keys are being pressed
and the machine is not stroking, the system will
initiate the backlight timeout count down. Once
the timeout limit is reached the display will
become dark as the backlight turns off. The
backlight automatically comes on again when a
key is pressed or the machine makes a stroke.
This feature extends the life of the backlight.

MultiSet Air Sys / MultiSet Slide Sys - The final

two settings indicate to the MicroLink unit that a
MultiSet system has been installed. The MultiSet
system has a separate air system control and a
slide system control. If either of these systems is
to be controlled, then the MicroLink configuration
for that system must be enabled. For instance, if a
counterbalance air system is to be controlled, but
not the slide adjust system, the air system should
be enabled and the slide system should be
disabled. When a system is disabled it will not be
monitored, so if a system is installed it should be
enabled on this screen.

Reset - The last four items on this screen are reset

options. The Reset Stroke Counter option allows
the supervisor to make the total stroke count go to
zero. Typically, the stroke counter should not be
reset, but under some circumstances, such as a
major machine rebuild, it may be desirable. The
code is provided separately from this manual for
administrative control. The remaining reset
options on this screen are for erasing segments of
memory. These options should only be used when
instructed to do so by Link personnel.

The two soft keys on the OIT configuration screen
provide links to the serial port and access code
configuration screens. Pressing the

Access Codes

soft key brings up a screen that allows the

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MicroLink: Operator Interface Terminal

supervisor to configure the access code system.
See Chapter 6 for more information.

Pressing the “Serial Ports” soft key brings up a
screen similar to Figure 4.2. This screen shows
each of the five communication ports in the
MicroLink unit. The soft keys on this screen are
used to configure the communication tasks, such
as a roll feed interface, a LinkNet connection, or a
programmable logic controller (PLC) interface.
See the feed manual or the LinkNet manual for
more information. Contact Link Systems for other
applications.

The MultiSet system has separate configuration
and calibration procedures. See the MultiSet
manual for more information.

Figure 4.2: Communications Setup Screen

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MicroLink: Operator Interface Terminal

5. OPERATION

The MicroLink system has built-in counters, job
information storage, diagnostics, and auxiliary
equipment communications. The screen shown in
Figure 5.1 is the main options screen for the
MicroLink system. This screen is the starting
point for going to any of the system screens. The
chart in Figure 2.2 shows the connections between
screens. This chapter describes the operation of
the counters and the job information storage and
recall. The access code system is explained in
Chapter 6 and the diagnostic features are covered
in Chapter 7. The auxiliary equipment
communications are explained in the separate
Feed Interface Manual and the MultiSet system is
covered in the separate MultiSet manual.

The stop condition will be output in one of two
ways. If there are no air adjust board or no air
adjust and slide adjust boards installed, the stop
relay in the MicroLink terminal will be used to
signal the stop. The wiring of this relay is
described in Section 3.2. If there is an air adjust
board or an air adjust and slide adjust board
installed, the Top Stop relays whose contacts are
accessible on the terminal strip located on the
back access cover will be used to signal the stop.

Figure 5.1: Main Options Screen

5.1 Counters

The MicroLink system uses an input to indicate
the top of the stroke. This “

Top” input is used by

the system to count strokes of the press. The
“Counter” screen is reached by pressing the soft
key next to the “

Counter” label on the main

screen. After this soft key is pressed the screen
will look similar to Figure 5.2.

This screen has five counters that can have three
properties. The “
strokes that the press has made. The “

Quantity” is the number of

Limit” for a

counter is the quantity at which the MicroLink
system will assert its top stop relay. This will stop
production when the required number of parts
have been made.

Figure 5.2: MicroLink Counters Screen

The “State” of the counter determines whether the
quantity will be updated when a press stroke is
made. If the state is set to “On” then the counter
increases normally, but if the state is “Off” then the
counter does not change.

The current quantity of any counter, except the
stroke counter, can be set to zero by pressing the

Clear Counter soft key.

The

Clear Tripped soft key only appears when a

counter has reached its limit. This soft key will
reset the counters that have reached their limits
and that are in the “On” state. Pressing this soft
key also removes the stop output for the counter
limit, which allows the press to be returned to
production

The limit, quantity, and state parameters can be
changed with the RUN/PROG key or an access
code (depending on access code set up). This
allows the supervisor to control who can change
these parameters. Use the arrow keys on the
keypad to position the blinking cursor on the item
that you wish to change and press the appropriate

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MicroLink: Operator Interface Terminal

soft key. The Change Limit soft key allows you to
enter a new number for the limit. The Change

Count

soft key allows you to enter a new number

for the current count. The Change Setting soft
key will switch the state between on and off.

The counter information can be stored and
recalled on a per job basis. This option must be
enabled on the OIT configuration screen (see
Chapter 4). The default option does not store the
counter information, but the counter quantities are
reset when a new job is recalled. This is the best
choice for the majority of applications.

A description of the usage of each counter is
found in the following sections. The “Inc Scrap”
soft key is described in the scrap counter section
(Section 5.1.4).

5.1.1 Part Counter

5.1.4 Scrap Counter

This special counter tracks the number of bad
parts and it requires direct input from the
operator. The MicroLink system counts parts
based on a

“Top of Stroke” input. Each time this

input is activated the system increases the
counters by one, even if the press has made a bad
part (scrap). The

Inc Scrap soft key. If a stroke does not produce a

“Scrap” counter works with the

good part, then the operator should press the Inc

Scrap

soft key. This will not only increase the

“Scrap” counter, it will also decrease the “Part”

and “Batch” counters if they are “On”. These
counters are decreased because they track the
number of good parts, so the scrap part will be
subtracted from the total count. Each time the Inc

Scrap

soft key is pressed the appropriate counters
are changed by one, so the key should be pressed
once for each bad part that was formed.

This counter is used to track the total number of
parts to be made. For instance, if a manufacturer
needs to produce 10,000 parts of a particular type,
then the part limit should be set to 10,000.

5.1.2 Batch Counter

This counter is used to track the number of parts
in the current batch. This is typically a smaller
number than the part counter. It might correspond
to the number of parts required to fill a parts bin
before a new one must be used. Continuing with
the earlier example, if the parts bin holds 1000
parts, then the

“Batch” limit should be set to 1000.

5.1.3 Quality Counter

This counter is used to track the number of press
strokes that occur before performing a quality
check. The manufacturer in this example may
want to perform a quality check every 250 parts,
so the

“Quality” limit should be set to 250. After

250 parts (press strokes) a stop output is asserted
and the display tells the operator that it is time to
perform a quality check. The operator
acknowledges the reason for the stop and resets
the “Quality” counter, typically after performing
the quality check. Then the operator can begin
production again.

5.1.5 Stroke Counter

This is the total number of strokes that the press
has made since the most recent initialization of
the counter. This counter provides an indication of
how much the press has been used, which can be
an important part of preventive maintenance
tracking. Generally, this counter is reset only if
the press itself has been completely rebuilt.
Therefore, the operator can not reset the “Stroke”
counter in this screen. It can only be reset in the
OIT configuration screen.

5.2 Job Storage and Recall

One of the primary advantages of a flexible
operator interface terminal, such as the MicroLink
system, is the ease of entering and viewing set up
information. The logical extension of entering the
information is the ability to store the information
for repeated usage. The MicroLink system
provides information storage for up to 250 jobs,
as well as general system configuration
information. The ability to store set up
information on a job by job basis is a vital feature
for any intelligent
production equipment because it saves time
during job changeovers. It also reduces the
likelihood of entering incorrect values because the

Manual Revision 1.0 4/20/99 5-2

MicroLink: Operator Interface Terminal

same values are recalled each time a job is
performed.

The job storage and recall functions for the
MicroLink system are on the “Jobs” screen, which
is found by pressing the Job Setups soft key on
the main “Options” screen. After pressing this soft
key the screen will look similar to Figure 5.3

Figure 5.3: Job Setups Screen

This screen shows the current job number and the
description of that job. The ability to store, recall,
or erase jobs can be limited using access codes.
They enable the supervisor to allow a user to
recall a job, but not to store a job. See Chapter 6
on access codes for more information. Each of the
soft keys on this screen are explained in more
detail in the following sections.

time and it will not change unless the job is
explicitly erased or overwritten.

5.2.2 Recall Job

Recall Job soft key brings up a screen similar

The
to Figure 5.4, which has a list of all of the jobs
that have previously been stored. The basic
options for recalling a job are to either enter the
job number or to scroll through the list of jobs.
The

Recall By Num soft key is used when the job

number of the desired job is already known. Enter
the job number in the pop up box and press the

ENTER key. If the job number is not known, then

use the Next Page and Prev Page soft keys and
the up and down arrow keys to place the cursor on
the job to be recalled. When the correct job
number is highlighted by the cursor, press the

Select soft key. Always read the warning that

appears and use it to double check the job number
and job description. If the correct job has been
selected then choose “Yes”. The screen will pop
up a box that informs the user that the job was not
recalled if the user chooses “No” on the warning
screen.

5.2.1 Store Job

The Store Job soft key brings up a screen similar
to Figure 5.3, but it allows the user to change the
job number and the job description. Then the job
can be stored to the battery powered memory
device on the circuit board with the given job
number and description. The job will not actually
be stored until the user presses the

Store Job soft

key. If a job with the same job number already
exists, the MicroLink system will ask the user for
permission to overwrite the old job. Choosing

“Yes” will store the new job and destroy the old

job! If “No” is chosen, then the job will not be
stored. The screen will always report a successful
job storage with a message box. If this box does
not appear, then the job storage operation failed.
Once the job is stored it can be recalled at any

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Figure 5.4: MicroLink Job Recall Screen

5.2.3 Erase Job

The Erase Job soft key brings up a screen similar
to Figure 5.5, which is a list of all of the
previously stored jobs. Note that this screen is
essentially the same as the “Recall Job” screen,
but that screen can only recall jobs and this screen
can only erase jobs. The method of selecting a job
to erase is the same as the method of choosing a
job to recall. The user can either use the

Num

soft key or the cursor and the Select soft

Erase By

MicroLink: Operator Interface Terminal

key. When a job is selected, the MicroLink
system will pop up a box asking the user to verify
that the selected job should be erased. If the user
chooses “Yes” then the job will be destroyed. If
the user chooses “No” then the job will not be
affected. The screen will pop up a box that
informs the user of whether the job was erased or
not.

Figure 5.5: MicroLink Job Erase Screen

screen that reports the status of any auxiliary
equipment. The “Feed” soft key on that screen
will bring up a screen similar to Figure 5.6. This
screen allows the user to change the feed length
and the feed speed by entering numeric values on
the appropriate lines with the RUN/PROG key in
the PROG mode. The feed length can also be
adjusted in small increments by using the Micro

Adj Up

status, the feed angle used, and the feed mode are
also reported on this screen. Contact Link
Systems for more information on feed and PLC
support.

and Micro Adj Dn soft keys. The system

5.2.4 LinkNet: Job Storage and Recall

A MicroLink system that is running with LinkNet,
the Link Systems data network for metalforming
facilities, will have more soft key options on the

“Store Job” and the “Recall Job” screens. These

soft keys provide the option of storing and
recalling jobs over LinkNet to a remote host
personal computer. The LinkNet specific soft
keys will include the word “Network” on their
labels. The non-LinkNet storage and recall soft
keys will include the word
The full details on using LinkNet for network job
storage and recall are included in the LinkNet
manual, which is included with the LinkNet
software.

5.3 Auxiliary Equipment Support

The MicroLink system can interface with some
external auxiliary equipment, such as some roll
feeds and some programmable logic controllers
(PLCs). This capability is built into the system
through the communications ports inside the
MicroLink unit. If the MicroLink system has been
configured to support any auxiliary equipment,
then there will be a “Aux Equip” soft key on the
main screen. Pressing this soft key will bring up a

“Local” on their labels.

Figure 5.6: MicroLink Feed Interface Screen

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MicroLink: Operator Interface Terminal

6. ACCESS CODES

The increasing flexibility of press controls and
automation equipment has led to the need to
designate the access capabilities of different users
and supervisors. The MicroLink system addresses
this need with the option of using access codes.
Access codes provide a method of controlling
which settings within the MicroLink a particular
user can change. The different functions and
settings of the system are divided into zones that
are accessed using numeric codes entered by the
user. Some examples of these different zones are:
configuration parameters, set point parameters,
job storage, and job recall.

The access code system of the MicroLink
terminal could be used to allow one group of
users to recall job information, but not change
setpoint parameters or save job information. This
group might be familiar with operating the press,
but not with set-up tasks, so the access code
allows them to recall job information (like the
shutheight setpoint), but not to change the
shutheight that has been saved for that job.
Another group of users may have an access code
that is configured to allow them to recall job
information, to change set points, and to save job
information. This group of users would typically
be the ones responsible for job set-up.

This individualized approach to access provides
flexibility and only requires a few configuration
steps for each user group. The MicroLink terminal
can also be configured to use just the “Run/Prog”
key for all access areas.

The access code system is simple to use. When
the cursor is on a field that requires an access
code, there will be a
this soft key and use the arrow keys to highlight
the desired user, then press the
Enter the correct code and access will be given.

6.1 Access Code Screen

The access code screen is used to configure the
individual access codes that are used in the
MicroLink system. In order to get to the access
code screen, the user must have the RUN/PROG

Supply Code soft key. Press

Select soft key.

key switch in the PROG position. From the main

“Options” screen, press the Diagnos soft key. On

the diagnostics screen, press the “Config OIT” soft
key, which is only present when the RUN/PROG
key is in the PROG position. The MicroLink
screen will pop up a window that tells you to
“Enter Pass Code.” This is a special pass code
that is set by Link Systems and is included
separately from this manual for administrative
control. The user must enter the pass code here
and press the ENTER key on the keypad. If the
code is wrong then the system will display a
message that says “Incorrect Code!”. If the correct
pass code is entered, then the system will enter the
OIT Configuration screen (see Figure 4.1). Press
the Access Codes soft key and the screen should
look similar to Figure 6.1. The RUN/PROG key
switch must remain in the PROG position on this
screen.

Figure 6.1: Access Code Screen

6.2 Functional Modes of the RUN\PROG Key

A primary objective of the access code idea is to
provide supervisors with greater flexibility by
allowing them to configure the system according
to their needs. This flexibility starts with setting
the functional mode of the RUN/PROG key to
one of the four optional settings. There are some
operations in the MicroLink system that require
the user to enter a number or to select an option,
such as setting count limits, choosing job
numbers, or changing the time and date. All of
these operations are considered edit operations
because the user is editing or changing some
information. The information that is highlighted
during the edit operation is called a field. The

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MicroLink: Operator Interface Terminal

setting of the functional mode of the RUN/PROG
key determines what is required for a user to edit
a field. Each of the four functionality settings is
briefly described below and more detail is given
in the subsections that follow.

Exclusive - The RUN/PROG key must be in the
PROG mode. Access codes are not used at all.

Required - The RUN/PROG key must be in the
PROG mode, and a valid access code must be
entered.

Not Required - The RUN/PROG key is not
required, but a valid access code must be entered.

Accesses All - Either the RUN/PROG key must
be in the PROG mode or a valid access code must
be entered.

6.2.1 RUN/PROG Key Exclusive Mode

This mode does not require user configurable
access codes, but it does require the RUN/PROG
key in order to edit fields. The “Exclusive” mode
operates the same as some other Link Systems
products, such as the OmniLink Press Control, the
System 1100 Tonnage Monitor, and the System
2500 Die Protection and Programmable Limit
Switch. Anyone familiar with these Link Systems
products will be familiar with the operation of the
“Exclusive” mode.

Simplicity is the primary advantage of this
approach. There are no access codes to enter and
there are only two user groups. Users with a key
can edit items, and users who do not have a key
can not edit items. The “Exclusive” mode may
work well for smaller facilities that have only a
few users. The disadvantage of this approach is
that if someone obtains the key to make any
changes, they also have access to all edit fields
because the individual user groups and their
access privileges are not being used. This mode
may also present some problems in larger
facilities because it may be more difficult to keep
track of who has keys.

6.2.2 RUN/PROG Key Required Mode

a valid access code, which takes the “Exclusive”
mode another step. A user must have the
RUN/PROG key in PROG mode and have the
access code of a user group that has been
authorized to edit that particular area before they
can edit a field.

Control of who has edit access for a particular
field is the primary advantage of this mode. It
provides the greatest protection from someone
making unauthorized changes.

6.2.3 RUN/PROG Key Not Required Mode

This mode does not use the RUN/PROG key at all
for most edit operations, but a valid access code is
required. The primary advantages of this mode are
that the users do not have to carry an actual key
and the access codes can be changed if a user
group changes. This allows the RUN/PROG key
to be kept in the control of a few supervisors,
since it is only used for special configuration
settings in this mode.

6.2.4 RUN/PROG Key Accesses All Mode

This mode does not require the RUN/PROG key
for most edit operations, but a valid access code is
required. If the user has the RUN/PROG key in
the PROG mode, then an access code is not
required. This is similar to the “Not Required”
mode in normal usage. The difference is that the
RUN/PROG key can be used to override the
access code system.

If the RUN/PROG key is used, it saves time by
avoiding the steps of choosing a user group and
entering a valid access code. This time savings
would be useful for people who make many
changes. The access codes are still defined by
user group and can be set up to give different
users access to different areas as with the other
modes. The RUN/PROG key functions like a
‘master’ code that has access to every area. Since
the key has full access in the “Accesses All”
mode, even without a valid access code, it is
important to control possession of the
RUN/PROG key.

This mode requires both the RUN/PROG key and
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6.3 Access Timeout

MicroLink: Operator Interface Terminal

After a user has entered edit mode with a valid
access code, the MicroLink system remains in edit
mode while the user is making changes. The
system must leave edit mode when the user is
finished with their changes. This logout operation
can be done either by the user or automatically by
the MicroLink system. The user can leave the edit
mode explicitly by pressing the contrast key on
the keypad (see Section 2.8). The automatic
logout is based upon either the amount of elapsed
time (seconds) or the number of press cycles
(strokes) since the most recent key press on the
MicroLink keypad. These parameters are set on
the “Access Timeout” lines on the access code
configuration screen shown in Figure 6.1.

For instance, if the “Access Timeout” is set to 30
seconds or 5 strokes and a user changes a set point
(in edit mode) and then does not press any more
keys, the system automatically leaves the edit
mode after either 30 seconds or 5 press cycles
(strokes), whichever is first. Alternatively, the
user could have pressed the contrast key (see
Section 2.8) to immediately leave the edit mode,
instead of waiting for the automatic access
timeout.

The “Access Timeout” is only meaningful when
access codes are being used. If the RUN/PROG
key setting is “Exclusive”, then the access code
settings do not matter because they are not used.

6.4 User Description

The access code system provides 8 user groups.
Each user group can have an unlimited number of
individual users. The description and access areas
of a user group are changed by moving the cursor
to the desired user group and then pressing the

Select soft key. After pressing this soft key the

screen will look similar to Figure 6.2.

Figure 6.2: Access Code Configuration Screen

6.4.1 User Configuration: User

The “User” line can be selected in order to change
the text that appears on the list of user groups.
This description may describe who uses the
access code, such as “Set Up” or “Operators”, or it
may be anything else that helps a user to quickly
identify the desired group from the list of all user
groups.

6.4.2 User Configuration: Code

The “Code” line is where the access code is
entered or changed. This is the number that a user
is required to enter after selecting a user group.
The number can be from 1 digit up to 4 digits. On
other screens, access codes only appear as
asterisks when the user enters them. As with any
pass code, this number should not be easy to
guess, but it should be reasonably easy to
remember.

The access code can be changed or viewed in this
screen at any time by someone with the
appropriate access. If the access code for a user
group needs to be changed because the user group
has changed, then changing the “
only necessary step.

Code” line is the

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6.4.3 User Configuration: Used

The “Used” line is for setting whether this
particular user group is available on the list of
user groups. If this line is set to
user group does not appear on the normal list of
user groups during operation. Typically, this will
be set to “Yes” once this group has been defined;

“No”, then this

MicroLink: Operator Interface Terminal

however, the user group can be disabled without
changing the rest of the configuration by setting
this to “No”.

6.4.4 User Configuration: Permissions

The permissions section of the screen is used to
set the level of access for a particular group. The
list of areas in the permissions section
corresponds to the areas that require an access
code. Each user group can be given clearance for
a particular area by choosing “Y” (yes) or denied
access by choosing “N” (no). For example, a user
group such as daily operators may need access to
recall jobs, but not to store jobs. The “Recall

Jobs”

line would have “Y” and the “Store Jobs”

line would have “N”.

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MicroLink: Operator Interface Terminal

7. DIAGNOSTICS

The MicroLink system includes diagnostic
features to help solve problems with the operation
of the system. The diagnostics section helps a user
to verify that the circuit boards have been
installed and detected by the MicroLink unit. It
also contains information about the status of the
inputs, outputs, and the last memory recall of the
MicroLink system.

The diagnostic information is located on the
screen that comes up when the Diagnos soft key is
pressed on the MicroLink main screen. The
diagnostic screen looks similar to Figure 7.1

The next two lines indicate whether the last
memory recall of the job information and of the
machine information were successful. These lines
will say
and the time are given on this screen also.

Note that this screen only reports information and
no data can be changed directly in this screen. The
soft keys are only used to go to other screens. The

Config OIT soft key is only present when the

RUN/PROG key is in the PROG position.
Pressing this key will take the user to the
configuration screen for the MicroLink system.
The View Stops soft key will take the user to a list
of all current stop conditions from the MicroLink
system. The Next Page soft key will take the user
to the MultiSet air and slide adjust system
diagnostic screens, if these systems are installed.
(See the MultiSet manual for more information.)

“Ok” under normal operation. The date

Figure 7.1: OIT Diagnostic Screen

The first line of the screen shows the version
number of the firmware. This makes it possible to
determine the firmware version number without
opening the MicroLink unit. This information is
useful when contacting Link Systems for
troubleshooting help. The next three lines show
the status of the three main board inputs,
including the RUN/PROG key. When the
RUN/PROG key is in the PROG position, that
line will say
given on the next line.

The next three lines show which system boards
have been detected. The “Aux Comm Board” plugs
into the MicroLink main board and should always
be detected. The
boards are part of the MultiSet system and should
be detected if they have been properly installed.

“Program”. The output relay status is

“Air System” and “Slide System”

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MicroLink: Operator Interface Terminal

APPENDIX A. INSTALLATION OF MICROLINK FIRMWARE

Firmware for the MicroLink display and MultiSet system is contained on an integrated circuit (also
called a chip) within the MicroLink display. Please follow the instructions listed below for replacing the
MicroLink firmware.

1. Remove all power from the MicroLink display. Changing firmware with the power on will damage
the unit. Warning! The connectors from the back access cover to the air valve and slide motor

starter carry 120 VAC! Be certain that power is also removed from all of these sources.

2. Remove the two screws from the back access panel of the MicroLink operator terminal, and carefully
tilt the back access panel outward. Disconnect the ribbon cable that is plugged into the circuit board on
the back access panel.

3. Unscrew the four screws on the small board inside
the display, and unplug the board. See Figure A.1.

4. Locate the integrated circuit (chip) labeled “801-A”,
“801-B”, or “801-C” and note the location of the notch
on this chip. Gently, remove the chip that is being
replaced. See Figure A.2.

5. Insert the new integrated circuit (chip) carefully to
avoid damaging any of the pins on the chip. Verify
that the notch on the chip is as shown in Figure A.2
and that the correct socket has been used.

6. Plug the small board onto the main board. The
mounting holes on the small board must line-up
exactly with the metal standoffs. If they are not aligned then remove the small board and move it to
obtain the correct alignment. Screw each of the four screws into the board once the appropriate
alignment is obtained. Refer to Figure A.1 again.

7. Connect the ribbon cable to the board on the
back access cover. Be sure to line-up the
polarizing tab on the ribbon cable connector with
the slot on the board connector.

8. Put the access cover back into place and add the
two screws to it.

Figure A.1: Mounting Screws on Plug on
Board

Figure A.2: Location and Orientation of Firmware

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MicroLink: Operator Interface Terminal

APPENDIX B. ELECTRICAL SPECIFICATIONS

B.1 MicroLink / MultiSet Enclosure

Size: 11.2" wide, 7.2" high, 4" deep

Operating Temperature: 45°C (113°F) Maximum Ambient

B.2 801-1 MicroLink Logic Board

Input Power Supply: Voltage: 115VAC ± 15VAC, 60 Hz, Single Phase

Fuse: 250 mA, Slow Blow, (5mm x 20mm)

Electromechanical Relay: Voltage: 120VAC, 60 Hz

(or) 30VDC

Current: 5Amp Continuous (AC or DC)

B.3 801-3 Air System Control Board

Electromechanical Relay: Voltage: 120VAC, 60 Hz

(or) 30VDC

Current: 5Amp Continuous (AC or DC)

Normally Open, Energized Closed

AC Solid State Relays: Voltage: 120VAC, 60 Hz

Current: 1Amp Continuous

20 Amp 16ms
5 Amp 75ms

Fuse: 2 Amp Fast-Blow Picofuse

B.4 801-4 Rotary Shut Height Control Board

AC Solid State Relays: Voltage: 120VAC, 60 Hz

Current: 1Amp Continuous

20 Amp 16ms
5 Amp 75ms

Fuse: 2 Amp Fast-Blow Picofuse

B.5 801-5 Linear Shut Height Control Board

AC Solid State Relays: Voltage: 120VAC, 60 Hz

Current: 1Amp Continuous

20 Amp 16ms
5 Amp 75ms

Fuse: 2 Amp Fast-Blow Picofuse

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