H7CL
H7CL
10
Precautions
Power Supplies
When turning the power ON and OFF, input signal reception is pos-
sible, unstable, or impossible as shown in the diagram below.
Power
supply
Input
Impossible
Unstable
Possible
Impossible
Unstable
160 ms
0 to 90 ms
10 ms with
AC input type
0 to 500 ms
ON
OFF
Apply the power supply voltage through a relay or switch in such a
way that the voltage reaches a fixed value immediately.
Turn the power ON and OFF with relay with a rated capacity of 10 A
minimum to prevent contact deterioration due to inrush current
caused by turning the power ON and OFF.
Transistor Output
The transistor output of the H7CL is insulated from the internal cir-
cuitry by a photocoupler, so the transistor output can be used as
both NPN and PNP output.
AC Models
NPN Output
10
11
3
2
1
9
10
11
3
2
1
9
+
+
Load
Power supply for load
Power supply for load
PNP Output
Load
DC Models
NPN Output
PNP Output
1
2
3
4
5
1
2
3
4
5
+
+
Load
Load
Power supply for load
Power supply for load
Self-diagnostic Function
The following displays will appear if an error occurs.
Display
Error
Output
status
Correction
Set value
after
correction
Present
value
underflow
(see note)
No
change
Press RST
Key or reset
input
No change
e1
CPU
OFF
Press RST
Key or turn
power off
e2
Memory
and then
ON
0
Note:
Given when present value falls below the minimum value
(–999) in Down (decrement) Mode.
Operating Environment
When using the Counter in an area with excess electronic noise,
separate the Counter, wiring, and the equipment which generates
the input signals as far as possible from the noise sources. It is also
recommended to shield the input signal wiring to prevent electronic
interference.
Organic solvents (such as paint thinner), as well as very acidic or
basic solutions can damage the outer casing of the Counter.
Set Value Change
If the user changes the set value while the Counter is operating, the
user should be aware that the H7CL’s output will be ON when the set
value is the same as the present value.
Reset with a Set Value of 0
When the set value is 0, after the Counter is reset, the output is ON
(while reset, output is OFF).
Reset Time
It takes 1 ms or 20 ms (selectable) to turn the output OFF with the
following deflection ranges.
Time required for resetting
Deflection range
1 ms
0.8 to 1.2 ms (Reference value)
20 ms
15 to 25 ms (Reference value)
Output Delay
The following table shows the delay from when the present value
passes the set value until the output is produced.
Actual measurements in N and K modes.
Control output
Max. counting
speed
Output delay*
Contact output
30 cps
16.5 to 24.0 ms
5 kcps
3.7 to 5.6 ms
Transistor output
30 cps
12.0 to 20.0 ms
5 kcps
0.2 to 0.55 ms
*The variation in delays is due to different modes and conditions.
Flush Mounting
The H7CL’s panel surface is water-resistive (conforming to NEMA 4
(indoors) and IP66). In order to prevent the internal circuit from wa-
ter penetration through the space between the Counter and operat-
ing panel, attach a rubber packing (provided with the H7CL) be-
tween the Counter and operating panel and secure the rubber pack-
ing with the Y92F-30 flush-mounting adaptor.
ÉÉ
It is recommended that the space
between the screw head and the
adaptor should be 0.5 to 1 mm.
0.5 to 1 mm
Other
In case of performing a dielectric strength test, etc., on the H7CL
mounted to a control panel, disconnect the H7CL from the connect-
ing circuitry, or short-circuit all the terminals of the H7CL.
Otherwise the H7CL may be damaged.
Terminal 1 (power supply terminal) and terminal 6 (input common:
0 V for input) of DC model H7CL are internally connected to each
other.
