Contec CNT24-2GY, User Manual

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3. Setup
22 CNT24-2(USB)GY
Counting Function
The functions supported by this product is listed below.
Because the count input multiplier and clear method can be set separately, the
supported modes are as follows: single-phase input is of 1 mode, 2-phase input is of 6
modes, single-phase input with gate control is of 2 modes.
Table 3.1. Count Functions
Input format Count input multiplier Clear Method
1
Multiplier
2
Multiplier
4
Multiplier
Asynchronous
Clear
Synchronous
Clear
Single-phase
input
Yes No No Yes No
2-phase input Yes Yes Yes Yes Yes
Single-phase
input with gate
control
Yes Yes No Yes No
Counter Operating Modes
Single-phase input
During single-phase input, the system counts up upon the input of an UP pulse, and
counts down upon the input of a DOWN pulse. A count fails if UP and DOWN
pulses occur simultaneously or both pulses happen to be LOW. In the application
that the pulses can be LOW simultaneously, we recommend you to count them
separately.
In the examination line for the product, it can be used to keep track of the number of
the good products and the inferior products, and to get the statistics of the defective
products.
Figure 3.7. Single-phase Input
Point
Phase-A counts up input, Phase-B counts down input.
Photoelectric tube
Reject amount
Photoelectric cell
4 5 6 7 8 9
CH0 phase-A
Reject amount
0
CH1 phase-B
1
Photoelectric tube