Red Lion C48C User Manual
THE 1/16 DIN COUNTERS
MODEL C48C INSTRUCTION MANUAL
INTRODUCTION
The C48 Counters (C48C) are a multi-purpose series of industrial control
products that are field-programmable for solving various applications. This
series of products is built around the concept that the end user has the capability to program different personalities and functions into the unit in order to
adapt to different indication and control requirements.
The C48C unit, which you have purchased, has the same high quality workmanship and advanced technological capabilities that have made Red Lion
Controls the leader in today’s industrial market.
Red Lion Controls has a complete line of industrial indication and control
equipment, and we look forward to servicing you now and in the future.
CAUTION:
Read complete instructions prior to
installation and operation of the unit.
CAUTION:
Risk of electric shock.
UL Recognized Component,
File # E137808
TABLE OF CONTENTS
GENERAL DESCRIPTION.............................................................................................................................................................1
Safety Summary.......................................................................................................................................................................1
Block Diagram ..........................................................................................................................................................................2
INSTALLATION & CONNECTIONS...............................................................................................................................................3
Multiple Unit Stacking ..............................................................................................................................................................3
Mounting Instructions ...............................................................................................................................................................4
Unit Removal Procedure ..........................................................................................................................................................4
Removing Unit Assembly ........................................................................................................................................................4
Installing Unit Assembly ...........................................................................................................................................................5
Output Board ...........................................................................................................................................................................5
Replacing Relay Output Board .........................................................................................................................................5
EMC Installation Guidelines ....................................................................................................................................................6
Wiring Connections .................................................................................................................................................................6
AC Versions (C48XX0X)....................................................................................................................................................7
DC Versions (C48CXX1X) .................................................................................................................................................7
Serial Communication Wiring ...................................................................................................................................................8
User Inputs ...............................................................................................................................................................................8
Output Wiring ...........................................................................................................................................................................8
Input A and Input/User B..........................................................................................................................................................8
Various Sensor Output Connections ......................................................................................................................................10
FRONT PANEL DESCRIPTION .................................................................................................................................................11
Keypad Functions ...................................................................................................................................................................11
BASIC OPERATION.....................................................................................................................................................................12
Single and Dual Preset Units.................................................................................................................................................12
3 Preset Batch Unit ................................................................................................................................................................12
Normal Operating Mode .........................................................................................................................................................12
Modifying A Secondary Display Parameter From the Front Panel ........................................................................................12
Protected Value Menu ...........................................................................................................................................................13
Front Panel Accessible Functions With Program Disable ....................................................................................................14
PROGRAMMING GENERAL DESCRIPTION .............................................................................................................................15
Programming Option Values ..................................................................................................................................................15
Programming Numeric Data Values.......................................................................................................................................15
Digit Entry ........................................................................................................................................................................15
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TABLE OF CONTENTS (Cont’d)
Auto Scrolling...................................................................................................................................................................15
Saving Program ...............................................................................................................................................................15
USER INTERFACE/PROGRAMMING MODES ...........................................................................................................................16
Programming Menu................................................................................................................................................................16
Numeric Value entry method ...........................................................................................................................................16
Access Prescaler Value ...................................................................................................................................................16
Prescaler (0.00001 - 9.99999*) .......................................................................................................................................16
Decimal Point Position .....................................................................................................................................................17
Count Input Mode ............................................................................................................................................................17
Count Modes .............................................................................................................................................................17
Counter (1) Operating Mode............................................................................................................................................18
Counter 2 Assignment (Batch Model only)......................................................................................................................20
Counter 2 Operating Mode (Batch Model only)...............................................................................................................21
Access Preset Values ......................................................................................................................................................22
Preset 1 Value .................................................................................................................................................................22
Preset 2 Value (Dual Preset/Batch Models only) ............................................................................................................22
Preset 3 Value (Batch Model only) ..................................................................................................................................22
Preset 1 Track Preset 2 (Dual Preset/Batch Models only) ..............................................................................................22
Access Output Time Values.............................................................................................................................................23
Output Resolution ............................................................................................................................................................23
Output 1 Time Value ........................................................................................................................................................23
Output 2 Time Value (Dual Preset/Batch Models only) ...................................................................................................23
Output 3 Time Value (Batch Model only) .........................................................................................................................23
Reverse Output Logic ......................................................................................................................................................23
Reverse Annunciator Logic..............................................................................................................................................24
Output Power-Up State....................................................................................................................................................24
User Inputs ......................................................................................................................................................................24
User Input 1 .....................................................................................................................................................................25
User Input 2 ....................................................................................................................................................................25
User Input B .....................................................................................................................................................................25
User F1 Key .....................................................................................................................................................................25
Programming / Protected Parameter Menu Code Value (0-199) ....................................................................................25
Scroll Display ...................................................................................................................................................................26
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TABLE OF CONTENTS (Cont’d)
Serial Baud Rate and Parity Settings ..............................................................................................................................26
Serial Unit Address (00-99) .............................................................................................................................................26
Serial Abbreviate Mnemonics ..........................................................................................................................................26
Print Options ....................................................................................................................................................................27
Print and Reset Count .....................................................................................................................................................27
Prescaler Output Pulse at [Prescaler Output Model Only] .............................................................................................27
Prescaler Output Pulse Length (1-9) [Prescaler Output Model Only] .............................................................................27
Factory Settings ...............................................................................................................................................................28
Factory Settings Chart...............................................................................................................................................28
User Settings Chart ...................................................................................................................................................29
RS-485 SERIAL COMMUNICATIONS.........................................................................................................................................30
Communication Format ..........................................................................................................................................................30
Sending Commands and Data...............................................................................................................................................30
Receiving Data .......................................................................................................................................................................32
Terminal Emulation Program For IBM®PC ...........................................................................................................................33
Serial Connections .................................................................................................................................................................33
Terminal Descriptions ......................................................................................................................................................33
Connecting To A Host Terminal .......................................................................................................................................34
Troubleshooting Serial Communications................................................................................................................................35
PRESCALER OUTPUT OPTION .................................................................................................................................................36
APPENDIX “A” - APPLICATION EXAMPLE ..............................................................................................................................37
APPENDIX “B” - SPECIFICATIONS AND DIMENSIONS ..........................................................................................................39
APPENDIX “C” - TROUBLESHOOTING ....................................................................................................................................43
APPENDIX “D” - CALCULATING THE PRESCALER................................................................................................................45
APPENDIX “E” - TERMINAL CONFIGURATIONS FOR C48 COUNTERS ...............................................................................46
APPENDIX “F” - ORDERING INFORMATION............................................................................................................................48
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GENERAL DESCRIPTION
The Model C48 Counter is available as a Standard Counter or a Batch
Counter. The Standard Counter is available with single or dual presets. The
Batch Counter has a main process counter with dual presets and a secondary
counter with a single preset. The secondary counter can be selected to function
as a batch or a total counter.
The C48C features a 7 segment, 2 line by 6 digit reflective or backlit LCD
display. For the backlit versions, the main display line is red and shows the
count value. When preset 3 or output 3 is viewed in the secondary display, the
Batch/Total value is viewed in the main display. The smaller secondary display
line is green and can be used to view the prescaler value, preset values, output
time values or Batch/Total count values (Batch model).
The C48C offers a choice of nine programmable counting modes for use in
applications requiring bi-directional, anti-coincidence, and quadrature counting.
The unit may be programmed to register counts on both edges of the input signal
providing frequency doubling capability. DIP switches are used for input
configuration set-up and to provide a Program Disable function.
Four front panel push-buttons are used for programming the operating modes
and data values, changing the viewed display, and performing user
programmable functions, i.e. reset, etc. The C48C can be configured for one of
two numeric data entry methods, digit entry or automatic scrolling. The digit
entry method allows for the selection and incrementing of digits individually.
The automatic scrolling method allows for the progressive change of one
through all digit positions by pressing and holding the “up” or “down” button.
The C48 Counter has programmable User Inputs and a programmable front
panel function key. The user inputs can be configured as sinking (active low) or
sourcing (active high) inputs via a single plug jumper. The following functions
are available for user inputs and the front panel function key.
The Program Disable DIP switch, a user-programmable code value, an
external user input (selected for Program Disable), and the Accessible value
parameters can all be utilized to provide multi-level protection against
unauthorized changes to data values and unit configuration.
The Standard Counter with Dual Presets is available with solid-state or Relay
outputs. The Single Preset model has a solid-state and relay output. The Batch
Counter has relay outputs for Output 2 and the Batch/Total Output (3), with
Output 1 available as solid-state. The Batch Counter is also available with three
solid-state outputs. For all C48 Counters, the solid-state outputs are available in
a choice of NPN current sinking or PNP current sourcing, open-collector
transistor outputs. All relay output boards are field replaceable.
A Prescaler Output model is available as a Dual Preset, with solid-state
outputs. The Prescaler Output is useful for providing a lower frequency scaled
pulse train to a PLC or another external totalizing counter. The Prescaler Output
provides an output pulse for every count, or every 10 counts registered on the
display.
Optional RS485 serial communication capabilities allow for interrogation
and modification of the preset, count, and prescaler values.
Optional programming software (SFC48) is available to program all unit
configuration parameters. The software allows unit configurations to be created,
uploaded, downloaded, and saved to a file for later use or multi-unit
programming.
The unit is constructed of a lightweight, high impact plastic case with a
textured front panel and a clear display window. The front panel meets NEMA
4X/IP65 specifications for indoor use, when properly installed. Multiple units
can be stacked horizontally or vertically. Modern surface-mount technology,
extensive testing, plus high immunity to noise interference makes the C48
Counters extremely reliable in industrial environments.
Safety Summary
All safety related regulations, local codes and instructions that appear in the
manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Do not use this unit to directly command motors, valves, or other actuators
not equipped with safeguards. To do so, can be potentially harmful to persons
or equipment in the event of a fault to the unit.
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Reset Print Request
Store and Reset Change Display
Program Disable Count Inhibit
Store Reset Outputs
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Figure 1, Block Diagram
BLOCK DIAGRAM
INSTALLATION & CONNECTIONS
The C48 Counter meets NEMA 4X/IP65 requirements for indoor use
to provide a watertight seal in steel panels with a minimum thickness of
0.09 inch, or aluminum panels with a minimum thickness of 0.12 inch.
The units are intended to be installed into an enclosed panel. The
complete unit assembly (i.e. PC boards and bezel), MUST be in the case
when mounting the unit.
Multiple Unit Stacking
The C48C is designed for close spacing of multiple units. Units can be
stacked either horizontally or vertically. For vertical stacking, install the
panel latch with the screws to the sides of the unit. For horizontal
stacking, the panel latch screws should be at the top and bottom of the
unit. The minimum spacing from center line to center line of units is 1.96”
(49.8 mm). This spacing is the same for vertical or horizontal stacking.
Note: When stacking units, provide adequate panel ventilation to ensure
that the maximum operating temperature range is not exceeded.
-3-
Figure 3, Multiple Unit Stacking
PANEL LATCH INSTALLED FOR
VERTICAL UNIT STACKING
PANEL LATCH INSTALLED FOR
HORIZONTAL UNIT STACKING
Figure 2, Panel Installation
Mounting Instructions
1. Prepare the panel cutout to the dimensions shown in Figure 3, Multiple Unit
Stacking.
2. Remove the panel latch from the unit. Discard the cardboard sleeve.
3. Carefully remove the center section of the panel gasket and discard. Slide the
panel gasket over the unit from the rear, seating it against the lip at the front
of the case.
4. Insert the unit into the panel cutout. While holding the unit in place, push the
panel latch over the rear of the unit, engaging the tabs of the panel latch in
the farthest forward slot possible.
5. To achieve a proper seal, tighten the panel latch screws evenly until the unit
is snug in the panel, torquing the screws to approximately 7 in-lbs.
Overtightening can result in distortion of the panel, and reduce the
effectiveness of the seal.
Note: The installation location of the counter is important. Be sure to keep it
away from heat sources (ovens, furnaces, etc.), and away from direct contact
with caustic vapors, oils, steam, or any other process by-products in which
exposure may affect proper operation.
Caution: Disconnect power to the unit and to the output control
circuits to eliminate the potential shock hazard when removing the
entire unit or unit assembly.
Unit Removal Procedure
To remove the entire unit with case from the panel, first loosen the panel latch
screws. Insert flat blade screwdrivers between the panel latch and the case on
either side of the unit, so that the latches disengage from the grooves in the case.
Push the unit through the panel from the rear.
Removing Unit Assembly
The unit assembly, shown in Figure 4, must be removed from the case to
change DIP switch settings or to replace the relay output board. To remove the
unit assembly, insert a flat blade screwdriver into the pry slot on either side of
the unit. Twist the screwdriver handle until the unit is ejected enough to allow
removal.
Caution: The unit assembly contains electronic circuits that can be damaged by
static electricity. Before removing the assembly, discharge static charge on
your body by touching an earth ground point. It is also important that the unit
assembly be handled only by the bezel. Additionally, if it is necessary to
handle a circuit board, be certain that hands are free from dirt, oil, etc., to
avoid circuit contamination that may lead to malfunction. If it becomes
necessary to ship the unit for repairs, place the unit in its case before
shipping it.
Installing Unit Assembly
To install the unit assembly, insert the assembly into the case until the bezel
is fully seated against the lip of the case. Properly installing the unit assembly
is necessary for watertight front panel sealing.
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Figure 4, Unit Assembly
Output Board
The C48C is supplied with an output board installed. The output board is
preconfigured for the type of output needed, based upon the Model ordered. See
Ordering Information, page 48, for available models. All relay output boards are
field replaceable.
Replacing Relay Output Board
1. Remove the unit assembly. (See Removing Unit Assembly, page 4).
2. Lift up on the top bezel board latch while gently pulling out on the
bezel/display board assembly. Do NOT remove the display board from the
bezel.
3. Remove the output board by pulling it away from the other boards. Replace
the output board by aligning the board to board connectors. Be certain
connectors are fully mated.
4. Connect the bezel/display board assembly by guiding the board ends into the
bezel latches. Slide the assembly on evenly until the display board connector
is completely engaged and bezel latches are fully seated onto the boards.
Note: When replacing the relay output board, be certain to install a new
output board of the same type.
-5-
Figure 6, Relay Output Board Replacement
Figure 5, Relay Output Board
EMC INSTALLATION GUIDELINES
Although this unit is designed with a high degree of immunity to ElectroMagnetic Interference (EMI), proper installation and wiring methods must be
followed to ensure compatibility in each application. The type of electrical
noise, source or coupling method into the unit may be different for various
installations. The unit becomes more immune to EMI with fewer I/O
connections. Cable length, routing and shield termination are very important
and can mean the difference between a successful installation or a troublesome
installation. Listed below are some EMC guidelines for successful installation
in an industrial environment.
1. The unit should be mounted in a metal enclosure, that is properly connected
to protective earth.
2. Use shielded (screened) cables for all Signal and Control inputs. The shield
(screen) pigtail connection should be made as short as possible. The
connection point for the shield depends somewhat upon the application.
Listed below are the recommended methods of connecting the shield, in order
of their effectiveness.
a. Connect the shield only at the panel where the unit is mounted to earth
ground (protective earth).
b. Connect the shield to earth ground at both ends of the cable, usually when
the noise source frequency is above 1 MHz.
c. Connect the shield to common of the unit and leave the other end of the
shield unconnected and insulated from earth ground.
3. Never run Signal or Control cables in the same conduit or raceway with AC
power lines, conductors feeding motors, solenoids, SCR controls, and
heaters, etc. The cables should be run in metal conduit that is properly
grounded. This is especially useful in applications where cable runs are long
and portable two-way radios are used in close proximity or if the installation
is near a commercial radio transmitter.
4. Signal or Control cables within an enclosure should be routed as far away as
possible from contactors, control relays, transformers, and other noisy
components.
5. In extremely high EMI environments, the use of external EMI suppression
devices, such as ferrite suppression cores, is effective. Install them on Signal
and Control cables as close to the unit as possible. Loop the cable through the
core several times or use multiple cores on each cable for additional
protection. Install line filters on the power input cable to the unit to suppress
power line interference. Install them near the power entry point of the
enclosure. The following EMI suppression devices (or equivalent) are
recommended:
Ferrite Suppression Cores for signal and control cables:
Fair-Rite # 0443167251 (RLC #FCOR0000)
TDK # ZCAT3035-1330A
Steward #28B2029-0A0
Line Filters for input power cables:
Schaffner # FN610-1/07 (RLC #LFIL0000)
Schaffner # FN670-1.8/07
Corcom #1VR3
Note: Reference manufacturer’s instructions when installing a line filter.
6. Long cable runs are more susceptible to EMI pickup than short cable runs.
Therefore, keep cable runs as short as possible.
7. Switching of inductive loads produces high EMI. Use of snubbers across
inductive loads suppresses EMI.
Snubbers:
RLC #SNUB0000
Wiring Connections
All conductors should meet voltage and current ratings for each terminal.
Also cabling should conform to appropriate standards of good installation, local
codes and regulations. It is recommended that power supplied to the unit (AC
or DC) be protected by a fuse or circuit breaker.
After the unit has been mechanically mounted, it is ready to be wired. All
wiring connections are made to rear screw terminals. When wiring the unit, use
the numbers on the label and those embossed on the back of the case, to identify
the position number with the proper function. See page 46 for terminal
descriptions. Strip the wire, leaving approximately 1/4” (6 mm) bare wire
exposed (stranded wires should be tinned with solder). Insert the wire under the
clamping washer and tighten the screw until the wire is clamped tightly.
Caution: Unused terminals are NOT to be used as tie points. Damage to the
counter may result if these terminals are used.
-6-
POWER WIRING
AC Versions (C48CXX0X)
AC Power Wiring
Primary AC power is connected to terminals 11 and 12, labeled AC. To
reduce the chance of noise spikes entering the AC line and affecting the counter,
an AC feed separate from that of the load should be used to power the counter.
Be certain that the AC power to the counter is relatively “clean” and within the
specified range. Connecting power from heavily loaded circuits or circuits that
also power loads that cycle on and off, (contacts, relays, motors, etc.) should be
avoided.
DC Power Wiring (Non PNP Output models)
The DC power is connected to terminals 9 & 10, marked COMM. and DC
OUT/IN. The DC power source must be capable of supplying the unit’s rated
current (150 mA max.) and be within the specified 11 to 14 VDC range. The
C48C has non-volatile memory that stores information on power down, thereby
eliminating the need for battery back-up.
Note: AC Versions with PNP outputs cannot be powered from DC.
DC Versions (C48CXX1X)
DC power (18 to 36 VDC) or low voltage AC power (24 VAC) is connected
to terminals 11 and 12, labeled DC+ (AC) and DC- (AC) respectively.
Output Power
For DC/ Low Voltage AC units that do not have PNP current sourcing
outputs, Terminal 10, DC OUT (V
SRC
IN), provides a DC output for sensor
power (+12 VDC +/-15%). The maximum sensor current is 100 mA.
For units with PNP current sourcing outputs, this terminal serves a dual
purpose depending on the application’s PNP output voltage level and current
requirements.
1. The terminal may be used as a +12 VDC output for sensor power. In this
case, the PNP output voltage level will be +12 VDC (±15%). A maximum
of 100 mA is available for the combination of sensor current and PNP
output sourcing current.
2. If a higher PNP output voltage level or additional output sourcing current
is desired, an external DC supply may be connected between the “DC
OUT (V
SRC
IN)” and “COMM.” terminals. This supply will determine the
PNP output voltage level, and must be in the range of +13 to +30 VDC.
An external DC supply can also provide the additional output sourcing
current required in applications where two or more PNP outputs are
“ON” simultaneously. However, the maximum current rating of 100
mA per individual output must not be exceeded, regardless of external
supply capacity.
-7-
CAUTION: Observe proper polarity when connecting DC
voltages. Damage to the unit will occur if polarity is
reversed.
Serial Communications Wiring
It is recommended that shielded (screened) cable be used for serial
communications. This unit meets the EMC specifications using Alpha #2404
cable or equivalent. There are higher grades of shielded cable, such as four
conductor twisted pair, that offer an even higher degree of noise immunity.
Refer to RS-485 Serial Communications, page 30, for wiring and operational
procedures.
User Inputs
The external user inputs are programmable inputs that can be configured as
current sinking (active low) or current sourcing (active high) inputs via a single
plug jumper. Programmable external user inputs are digital inputs. The use of
shielded cable is recommended. Follow the EMC Installation Guidelines for
shield connection. The active logic state of ALL user inputs is dictated by the
position of the User Input plug jumper. The plug jumper is located on the CPU
board to the left of the DIP switches (See Figure 7, User Input Jumper
Location). Input/User B can be programmed to be a user input when only
unidirectional counting is required (See CNT IN parameter, page 17). When
programmed as a User Input, Input B’s active logic level is also controlled by
the User SNK/SRC plug jumper.
OUTPUT WIRING
Relay Connections
To prolong contact life and suppress electrical noise interference due to the
switching of inductive loads, it is good installation practice to install a snubber
across the contactor. Follow the manufacturer’s instructions for installation.
Note: Snubber leakage current can cause some electro-mechanical devices to be
held ON.
Input A and Input/User B
Input A and Input B have identical circuitry and share the same “COMM.”
terminal. Each input has separate DIP switches that configure the circuitry to
accept various types of sensor outputs.
The input schematic shows the details of the input circuitry. Each input has
three DIP switches whose functions are listed below.
To access the DIP switches, the unit assembly must be removed from the
case. See Removing The Unit Assembly, page 4, for instructions.
INPUT A
SW1 - SNK: Provides a 7.8 KΩ internal pull-up resistor for sensors with
current sinking outputs.
SRC: Provides a 3.9KΩ internal pull-down resistor for sensors with
current sourcing outputs.
SW2 - HI FRQ: Removes damping capacitor and allows operation up to the
maximum input frequency.
LO FRQ: Connects damping capacitor for switch contact debounce.
Limits count speed to 50 Hz maximum and count pulse ON or OFF
times to 10 msec. minimum.
Note:The HI/LO FRQ selection switch must be set on “LO FRQ” when switch
contacts are used to generate count input signals. The “LO FRQ” mode also
provides very high immunity against electrical noise pickup. It is
recommended that this mode also be used, whenever possible, with electronic
sensor outputs. The “LO FRQ” mode can be used with any type of sensor
output, provided count pulse widths never decrease below 10 msec, and the
count rate does not exceed 50 Hz.
-8-
Figure 7, User Input Jumper Location
SW3 - HI BIAS: Sets input trigger levels at mid-range, to accept outputs from
2-wire proximity sensors, resistive photo-cells, and logic pulses
with full 0 to +12V swings.
Input trigger levels: VIL= 5.5 V max; VIH= 7.5 V min.
LO BIAS: Sets input trigger levels to low range, to accept logic pulses
with 0 to +5 V swings.
Input trigger levels: VIL= 1.5 V max; VIH= 3.75 V min.
Note: VILand VIHlevels given are typical values ±10%, when the counter
voltage at the DC OUT/IN terminal, is +12 VDC. These typical values will
vary in proportion to the variations in DC OUT/IN terminal voltage, caused
by line voltage and load changes.
INPUT B
SW4 - Same as SW1
SW5 - Same as SW2
SW6 - Same as SW3
SW7 - PGM.DIS.: See Front Panel Accessible
Functions With Program Disable,
page 14, for details.
-9-
Figure 9, Input Circuit Schematic
Figure 8, DIP Switches
Note: Input B uses
DIP switches SW4,
SW5 and SW6.
-10-
Various Sensor Output Connections
SENSORS WITH CURRENT SOURCE OUTPUT (PNP O.C.)
(COUNT ON TURN-OFF)
2 WIRE PROXIMITY SENSORS - CURRENT SOURCE CONNECTED
(COUNT ON CURRENT FALL)
OLDER STYLE SENSORS WITH E-F OUTPUT - CURRENT
SOURCE CONNECTED (COUNT ON FALLING EDGE)
SENSORS WITH CURRENT SINK OUTPUT (NPN O.C.)
(COUNT ON TURN-ON)
CURRENT SINK CONNECTED (COUNT ON CLOSING)
INTERFACING WITH CMOS CIRCUITRY (B TYPE)
NOTES:
1. SENSOR VOLTAGE AND CURRENT
The DC OUT/IN terminal can supply +12
VDC @ 100 mA max. within a ±15%
range, due to line and internal load
variations. Most RLC sensors will
accommodate this range.
2. HI/LO FRQ SELECTION
The HI/LO FRQ selection switch must be
set on “LO FRQ” when switch contacts
are used to generate count input signals.
The “LO FRQ” mode also provides very
high immunity against electrical noise
pickup. It is recommended that this mode
also be used, whenever possible, with
electronic sensor outputs. The “LO FRQ”
mode can be used with any type of sensor
output, provided count pulse widths never
decrease below 10 msec, and the count
rate does not exceed 50 Hz.
3. When shielded cable is used, connect the
shield to “COMM.” at the counter and
leave it disconnected at the sensor end.
4. Inputs A and B can accept source pulses
from other circuits up to +30 V in
amplitude. For voltages above +30 V, a
limiting resistor and zener diode should
be used to limit the voltage at the input
terminal.
INTERFACING WITH TTL
COUNT SWITCH OR ISOLATED TRANSISTOR OUTPUTS
CURRENT SOURCE CONNECTED (COUNT ON OPENING)
The front panel bezel material is flame and
scratch resistant, textured plastic with clear
viewing window that meets NEMA 4X/IP65
requirements, when properly installed.
Continuous exposure to direct sunlight might
accelerate the aging process of the plastic
material used in the bezel. The bezel should be
cleaned only with a soft cloth and neutral soap
product. Do NOT use solvents.
The display is a dual line, 6 digit LCD. On
units with backlighting, the upper Main
Display is red and the lower Secondary
Display is green.
There are up to seven annunciators available
in the lower display that illuminate to inform the operator of the counter and
output status. See Figure 10, Front Panel, for a description of the annunciators.
Four front panel keys are used to access different modes and parameters. The
following is a description of each key.
Do not use tools of any kind (screwdrivers, pens, pencils, etc.) to operate the
keypad of this unit.
Keypad Functions
D- This key is a user programmable key. When the key is pressed, the unit
performs the appropriate function as programmed. The RST printing on
this key is used as a quick reference for the operator if the function key is
selected for a reset function.
A - This key is used to access programming, enter changes to data values,
and scroll through the available parameters in any mode.
B - This key selects the next available mode option during programming.
When programming a numerical value in digit entry mode, this key is used
to increment the selected digit position. In auto scrolling entry mode, it
increments the value. When in the operating mode, this key is pressed to
allow changing of the data value viewed in the secondary display.
C - When programming a numerical value in digit entry mode, this key
accesses the value and selects the digit to the right. In auto scrolling entry
mode, it decrements the value. When in the operating mode, this key is
pressed to allow changing of the data value viewed in the secondary
display.
-11-
Figure 10 , Front Panel
FRONT PANEL DESCRIPTION
BASIC OPERATION
Single and Dual Preset Units
The C48CS and C48CD have one counter that keeps track of the input pulse
count. On each counter edge, the prescaler value is added to or subtracted from
the count value. This results in the desired reading value for the count display.
The counter has two reset action modes; Reset to Zero ( up-count modes) and
Reset to Preset (down-count modes). A reset can be a manual reset, using a
programmable user input, or it can be one of the programmable automatic reset
modes.
The counter displays the scaled number of pulses that have been entered.
When the count equals either preset 1 or 2, depending on the model, the
appropriate output activates. The count can be programmed to automatically
reset if desired.
3 Preset Batch Unit
The C48CB contains two counters that keep track of the Process Count, and
the Batch or Total Count. On each count edge, the prescaler value is added to or
subtracted from the count input value. This results in the desired reading value
for the process or total count displays. The batch count registers one count each
time the process is completed.
The process counter has two reset action modes; Reset to Zero (up-count
modes) and Reset to Preset (down-count modes). A reset can be a manual reset,
using a programmable user input, or it can be one of the programmable
automatic reset modes.
The batch counter displays the number of process cycles that have been
completed.
The total count is the total number of counts that have been received since the
total was last reset. It can be used to keep a running total of process units on a
desired per shift, per day, per week, etc. basis.
Normal Operating Mode
In the normal operating mode, the count or batch/total value is shown on the
main display. By successively pressing the A key, the accessible presets,
prescaler, output time values, or batch/total count can be viewed in the
secondary display.
With the exception of the batch/total count, each of the values can be
independently programmed to be viewable only, viewable and changeable, or
locked (not viewable) in the normal operating mode. On the batch models, if all
values are locked, only the batch/total count value is viewable in the secondary
display. On single or dual preset models, the display will be blank. Only from
the normal operating mode can access be gained to the Programming Menu or
Protected Value Menu.
Modifying A Secondary Display Parameter
From the Front Panel
Secondary display parameters can be modified from the normal operating
mode if the Operator Access privileges allow it.
To modify a parameter, it must be viewed in the secondary display. When the
parameter to be modified is viewed, press the B or C key. Leading zeros
appear and the least significant digit blinks. The value can now be modified as
described in Programming Numeric Data Values, page 15.
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