DESCRIPTION (Cont’d)
The program disable DIP switch, the code value, and an external user input
selected for Program Disable can be utilized to provide multi-level protection
against unwanted changes to data values and unit configuration.
The Legend Plus features enhanced serial communications. The serial port
can be configured for connection to RS485 or RS232 devices. It can be used for
data retrieval and for programming various data values.
Optional Legend Plus Programming Software for IBM
compatible PCs is
available to program all the Legend configuration parameters, such as messages,
count modes, etc. The software allows unit configurations to be created,
uploaded, downloaded and saved to a file for rapid programming of the Legend
unit.
The six programmable User Inputs can be configured to provide a variety of
functions. Four user inputs are located on the upper rear terminal block and the
other two inputs are front panel function keys. The User Inputs can be
configured to provide functions such as:
Count
Inhibit
Reset
Message Request
Message Cancellation
Output
Activation Output
Deactivation
Program Disable
View/Freeze Display
Print Request
Skip Presets(outputs)
The units offer a choice of seven programmable counting modes for use in
applications requiring Bi-directional, Anti-coincidence, and Quadrature
counting. The count inhibit function can be utilized with all of these input
response modes by programming User Input 4 for the Inhibit Count function.
The input circuitry is switch selectable to accept signals from a variety of
sources. In the Anti-coincidence mode both inputs are monitored simultaneously,
so that no counts are missed, and the final count can be chosen as the sum or
difference of the two inputs.
Rate, Process and Total displays have separate scaling and decimal point
placement, for readouts in different units. The Counter Load feature enables the
operator to modify the count value. This is useful when flawed material has
been counted and it is necessary to adjust the count value accordingly.
The rate operates in the time interval method (1/tau) to calculate the rate
value. This method insures high resolution at all input rates. Averaging can be
accomplished by programming the Minimum and Maximum Update Time for
the desired response. Extensive scaling capabilities allow practically any
reading at very slow input rates.
The construction of the Legend Plus unit is a lightweight, high impact plastic
case with a clear viewing window. The sealed front panel with silicone rubber
keypad meets NEMA 4X/IP65 specifications for wash-down and/or dusty
environments, when properly installed. Plug-in style terminal blocks simplify
installation and wiring change-outs.
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.
MODEL - LGPB
The process counter is used to monitor the count within the batch. Presets 1
through 4 can be assigned to the process counter or the rate indicator. Presets 3
and 4 can also be assigned to either the batch counter or totalizer.
Presets 1 and 2 can activate relay outputs 1 and 2 respectively. Presets 3 and
4 can activate the NPN open collector outputs O3-SNK and O4-SNK
respectively.
MODEL - LGPM
The Multi Preset unit has 6 presets which can control NPN open collector
outputs 01-SNK to 06-SNK respectively. Presets 1 through 6 can be assigned to
either the rate or count display.
SPECIFICATIONS
1.
DISPLAY:
2x8, 0.3" (7 mm) high characters, negative image transmissive
LCD, with Single (green or red) or Dual Color (green and red) LED
backlighting.
2.
POWER:
AC Operation
: 115/230 VAC ±10%, 50/60 Hz, 10 VA, switch selectable.
DC Operation
: +12 VDC ±20% @ 250 mA max.
3.
MEMORY:
Non-volatile memory retains all programming information.
Count and Preset values are written to non-volatile memory when power is
interrupted. All other programming parameters are written to memory when
programming mode is exited. If power is removed while in the programming
menu’s the parameters are stored to previously saved settings.
Data Retention
: 10 yr. min.
Message/Mnemonics Memory
:
792 (LGPB) / 804 (LGPM) bytes available (with factory settings loaded).
4.
SENSOR POWER:
+12 VDC ±25% @ 100 mA.
5.
INPUTS A and B:
DIP Switch selectable to accept count pulses from a
variety of sources including switch contacts, outputs from CMOS or TTL
circuits, magnetic pickups and all standard RLC sensors.
LOGIC
: Input trigger levels V
IL
= 1.5 V
MAX
; V
IH
= 3.75 V
MIN
.
Current sinking
: Internal 7.8 K
pull up to +12 VDC, I
MAX
= 1.9 mA.
Current sourcing
: Internal 3.9 K
pull-down, 7.3 mA
MAX
@ 28 VDC.
Debounce
: Damping capacitor provided for switch contact bounce.
Limits count speed to 50 Hz and input pulse widths to 10 msec min.
MAGNETIC PICKUP
:
Sensitivity
: 200 mV peak.
Hysteresis
: 100 mV.
Input impedance
: 3.9 K
@ 60 Hz.
Maximum input voltage
: ±50 Vp
Note: For magnetic pickup input, the sink/source DIP switch must be in the
SRC position.
6.
RATE ACCURACY:
±0.01%
7.
RATE MINIMUM INPUT FREQUENCY:
0.01Hz.
8.
MAXIMUM COUNT RATE IN KHz:
MODEL
CNT + DIR
QUAD
ADD/ADD
ADD/SUB
X1
X2
X1
X2
X4
X1*
X1*
LGPB (Batch)
15
7
7
5.5
3
14
7
LGPM (Six Preset)
13
6
6
5
2.5
12
6
LGPBF (Foot-Inch)
15
7
7
5.5
3
15
7
Notes:
1. Maximum count rates given are for Process counter set for Auto reset with
the auto cycle preset set to an equivalent of 100 count pulses or greater.
With auto cycle presets less than 100 counts the maximum count rates may
be lower. The actual Preset value for 100 count pulses, with Count
SF=0.5000 and Count Scale Multiplier=X1, would be 50.
2. Maximum count rate given for X2 & X4 count modes are given for 50%
duty cycle signals and Quad signals with 90° phase shift.
*
Inputs A & B count rates summed.
9.
MAXIMUM COUNT CAPACITY:
Process or Count
: 9 digits internal (non-scaled), 6 digits displayable (scaled)
Batch Count
: 6 digits
Total Count
: 11 digits internal (non-scaled), 8 digits displayable (scaled)
10.
CONTROL INPUTS:
Programmable user inputs (4)
:
USR INP 1 to 3
: Internal 10 K
pull-up to +5 VDC, V
IL
= 1.5 V
MAX
; V
IH
= 3.5 V
MIN
, response time = 30 msec typical, 100 msec max.
(count rate
dependent)
.
USR INP 4/INH
: Internal 10 K
pull-up to +5 VDC, V
IL
= 1.5 V
MAX
, V
IH
= 3.0 V
MIN
, response time = 30 msec typical, 100 msec max.
(count rate
dependent)
.
INHIBIT Response time = 50
μ
sec max.
User Inputs Programmed for Binary Message Request
: Debounce =
100 msec.
(Binary message request inputs must be stable for 100 msec
before a message is requested)
.
11.
SERIAL COMMUNICATIONS:
Type
: Jumper selectable RS485 or RS232.
Can connect up to 32 units when using RS485 interface.
Baud Rate
: Programmable from 1200 to 9600.
Maximum Addresses
: Programmable from 00 to 99. (Actual number on a
line is limited by hardware specifications)
Transmit Delay
: Programmable for 0.002 or 0.100 second.
Data Format
: 10 Bit Frame; 1 start bit, 7 or 8 data bits, 1 or no parity bit,
and 1 stop bit. Parity is programmable for ODD (7 data bits), EVEN (7
data bits), or NO Parity (8 data bits).
12.
OUTPUT(S):
Solid-State
: Current sinking NPN open collector transistor.
V
CE
= 1.1 V
SAT
@ 100 mA max. V
OH
= 30 VDC max.
(Internal Zener Diode Protection).
LGPM
RATE
PEAK
VALLEY
PROCESS
BATCH
TOTAL
(4 Presets)
RATE
PEAK
VALLEY
COUNT
(6 Presets)
LGPB & LGPBF
STANDARD INDICATION DISPLAYS
& PRESETS FOR EACH MODEL
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
