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OPERATION MODE
Output mode
Output control is maintained after count-up
completion and until resetting.
During that time, the count display does not
Output maintain/
change from that at count-up completion.
hold count
HOLD-A
Output control is maintained after count-up
completion and until resetting. However,
counting is possible despite completion of
Output maintain/
count-up.
over count I
HOLD-B
Output control is maintained after count-up
completion for a fixed time (approx. 1 sec.).
Counting is possible despite completion of
One shot/
count-up.
over count
SHOT-A
Output control is maintained after count-up
completion for a fixed time (approx. 1 sec.).
Counting is possible despite completion of
One shot/
count-up. However, reset occurs
recount I
simultaneous with completion of count-up.
While output is being maintained, restarting
SHOT-B
of the count is not possible.
Cautions for use
1. Input and output connection
1) Input connection
(1) Contact input
Use highly reliable metal plated contacts.
Since the contact's bounce time leads
directly to error in the count value, use
contacts with as short a bounce time as
possible. In general, select input to have a
maximum counting speed of 30 Hz.
5
Count
1
2
3
4
input
6
(2) Non-contact input (Transistor input)
Connect with an open collector. Use
transistors whose characteristics satisfy
the criteria given below.
2. Self-diagnosis function
If a malfunction occurs, one of the following displays will appear.
Output
Display
Contents
condition
Malfunctioning
Err-00
CPU
OFF
Malfunctioning
Err-01
memory*
* Includes the possibility that the EEP-ROM's life has expired.
Operation
VCEO = Min. 20 V
IC = Min. 20 mA
ICBO = Max. 6 µA
Also, use transistors with a residual
voltage of less than 2 V when the
transistor is on.
* The short-circuit impedance should be less
than 1 kΩ.
(When the impedance is 0 Ω, the current
coming from the count input terminal is
approximately 5 mA and from the reset
Reset
input
input terminal is approximately 1.5 mA.)
Also, the open-circuit impedance should
be more than 100 kΩ.
Count
input
Restoration
Preset values after
procedure
restoration
The preset value at
start-up before the
Enter front
CPU malfunction
reset key or
occurred.
restart
counter
0
Example when input mode is either addition or Subject:ubtraction
Output
Counting able/unable
Addition
0
1
n
n–1
Subtraction
Output
Counting able/unable
Addition
0
1
Subtraction
n
n–1
Output
Counting able/unable
Addition
0
1
n
n–1
Subtraction
Output
Counting able/unable
Addition
0
1
n
n–1
Subtraction
5
Reset
1
2
3
4
input
6
3. Terminal connection
1) When wiring the terminals, refer to the terminal layout and
wiring diagrams and be sure to perform the wiring properly
without errors.
2) After turning the counter off, make sure that any resulting
induced voltage or residual voltage is not applied to power supply
terminals (1) through (2). (If the power supply wire is wired
parallel to the high voltage wire or power wire, an induced voltage
may be generated at the power supply terminal.)
3) Have the power supply voltage pass through a switch or relay
so that it is applied at one time.
07/2004
OFF
Able
2
3
4
n–1
n–2
n–3
n–4
1
OFF
Able
2
3
n–2
n–1
n
n–2
n–3
2
1
0
One shot pulse width: approx. 1 sec.
OFF
Able
2
3
n–2
n–1
n
n–2
n–3
2
1
0
One shot pulse width: approx. 1 sec.
OFF
ON
Able
2
3
n–1
0
1
n–2
n–3
n
n–1
1
(3) Input wiring
When wiring, use shielded wires or
metallic wire tubes, and keep the wire
lengths as short as possible.
2) Output connection
Since the transistor output of counter is
insulated from the internal circuitry by a
photo-coupler, it can be used as an NPN
output or PNP (equal value) output.
As NPN output
Load
5
1
2
3
4
6
As PNP output
5
1
2
3
4
6
Load
LC2H
ON
Unable
n
0
n: Preset value
ON
n+1
n+2
n+3
–1
–2
–3
n: Preset value
ON
n+1
n+2
n+3
–1
–2
–3
n: Preset value
2
3
4
n–2
n–3
n–4
n: Preset value
Load's power
supply
Load's power
supply
83
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