Input/Output Functions; Characteristics; Using Prescale Function - Omron H7CR-A Series Manual

H7CR

CHARACTERISTICS

Insulation resistance 100 MΩ min. (at 500 VDC) (between current-carrying terminal and exposed non-current-carrying metal
parts, and between non-continuous contacts)
Dielectric strength 2,000 VAC, 50/60 Hz for 1 min (between current-carrying terminal and exposed non-current-carrying
metal parts)
Impulse voltage Between power terminals: 1 kV for 24 or 12-24 VDC power supply, 3 kV for others
Between current-carrying terminal and exposed non-current-carrying metal parts: 1.5kV for
24 or 12-24 VDC power supply, 4.5 kV for others
±2 kV between power terminals, ±600 V between input terminals (square-wave noise via
Noise immunity
noise simulator; pulse width: 1µs; 1-ns rise)
Static immunity Malfunction: 8 kV; destruction: 15 kV
Vibration Mechanical durability: 10 to 55 Hz with 0.75-mm (0.03 in) single amplitude/55 to 150 Hz with 10 G 32
Malfunction durability: 10 to 55 Hz with 0.5-mm (0.02 in) single amplitude/55 to 150 Hz with 10 G 32
Shock Mechanical durability: 30 G
Malfunction durability: 10 G
Life Mechanical: 10 million operations min.
Electrical: 100,000 operations min. (at 3 A, 250 VAC general in use (p.f. = 0.7 to 0.8)
Weight Economical counters: AC types, approx. 230 g (8.1 oz.); DC types, approx. 150 g (5.3 oz.)
Standard and +/– range counters: Approx. 170 g ( 6 oz.)

Input/Output Functions

INPUTS
CP1/CP2
(count inputs)
Reset
Key protect
Count Input vs. Reset Input
When the RESET input is ON or the RESET key input is ON,
the count input is prohibited and the present value is reset.
However, when the key protect input is ON and the key protect
level is KP-2 or KP-4, no RESET key input is accepted.
OUTPUTS
Outputs 1 and 2 Outputs made according to designated output mode when corresponding preset is
reached.

Using Prescale Function

The prescale function converts the number of input counts into
a user-selectable value. The example below shows a system
that uses 250 encoder pulses to determine when an object has
advanced 0.5 meters. Here is how to convert pulses into a unit
of measure appropriate for your application:
1. Set the decimal point between the third and fourth digits.
2. Set a prescale value of 0.002. This is calculated by
dividing the unit of measure (0.5) by the number of pulse
counts (250).
min each in three directions
min each in three directions
• Count signal inputs.
• Up, Down, and Reversible (command, individual, or phase difference) inputs accepted.
• Maximum counting speed: 5 kcps.
• Present value reset (to zero in Up or Up/Down modes, to preset with 1-stage models
in Down mode and to preset 2 for 2-stage models in Down mode).
• Count inputs are not acknowledged while reset input is ON.
• Reset indicator lit while reset input is ON.
• Reset, Right Shift and Up keys are inoperative while key protect input is ON.
• Although Display key remains effective, only monitoring of settings is possible.
• Keys protected indicator lit while key protect input is ON.
• Effective when power supply is turned off.
Reset Time
Set to 1 ms if high-speed resetting is necessary. Set the reset
time to 20 ms if you need to prevent false signals caused by
electrical noise from affecting the counter.
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H7CR