Operation Mode; Cautions For Use - Panasonic LH2H Manual

Operation mode

Operation mode
• Elapsed value does not clear at power ON.
(Power outage countermeasure function)
• The output remains ON even after the
Totalizing ON delay
power is OFF and restarted.
G
• Clears elapsed value at power ON.
• Time delay starts at start ON and output
resets at start OFF.
Signal ON delay
• Time delay starts at reset OFF and power
B
ON while start is ON.
• Clears elapsed value at power ON.
• Time delay starts at start ON.
• After timer completion, control output
Signal Flicker
reverses, elapsed value clears, and time
F
delay starts.
• Ignores start input during time delay.
• Clears elapsed value at power ON.
• Time delay starts at start ON.
• After timer completion, control output is
Pulse ON delay
ON.
E
• Ignores start input during time delay.

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 timer operating time,
use contacts with as short a bounce time
as possible.
5
Start
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.
V = Min. 20 V
CEO
I = Min. 20 mA
C
I = Max. 6 µA
CBO
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.
3. Power failure memory
The EEP-ROM is overwriting with the following timing.
Operation mode
G (Totalizing ON delay) Change of preset value or when power is
mode OFF after start and reset input turns ON
When power is OFF after changing preset
Other modes
value
Explanation
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 start input terminal is
approximately 5 mA and from the reset
input terminal is approximately 1.5 mA.)
Also, the open-circuit impedance should
Reset
input
be more than 100 kΩ.
Start
input
(3) Input wiring
When wiring, use shielded wires or
metallic wire tubes, and keep the wire
lengths as short as possible.
Restoration Preset values after
procedure restoration
Preset value at
start-up before the
Enter front
CPU malfunction
reset key or
occurred
restart hour
meter
0
Overwrite timing
ON
OFF
Power supply
ON
OFF
Output
T
ON
Reset OFF
ON
Start OFF
ON
OFF
Power supply
T
ON
OFF
Output
ON
Reset OFF
ON
Start OFF
ON
OFF
Power supply
ON
OFF
Output
T
ON
Reset OFF
ON
Start OFF
ON
OFF
Power supply
ON
OFF
Output
T
ON
Reset OFF
ON
Start OFF
5
Reset
1 2 3 4
input
6
4. 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 hour meter 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
Time chart
T=t1+t2
t1 t2
T
ta
T T
T
2) Output connection
Since the transistor output of hour meter
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
LH2H
T>ta
ta
T>ta
T
Load's power
supply
Load's power
supply
127