Rockwell-automation 1746-HSCE2 Multi-Channel High Speed Counter Module Manual de usuario descargar pdf (Pagina 68)

Publication 1746-UM002B-EN-P - August 2004

4-18 Configuration and Programming

CNTR No.: Counter Number Bits

(Word 1, Bits 08 and 09)

These two bits select the counter to which this programming block is

applied.

Minimum/Maximum Rate Value Words

(Words 1 to 4)

The valid range of this parameter is dependent on the operating class

of the module.

If the calculated rate value is less than the minimum value, a rate

underflow bit is set in the input image table. If the calculated rate

value is greater than the maximum value, a rate overflow bit is set in

the input image table. Outputs assigned to the counter still function

normally.

Operating Class

The format of the minimum/maximum rate values depends on the

operating class of the module.

Class 1

When the module is operating as Class 1, the minimum/maximum rate

values are programmed in two-word integer format.

Table 4.8 Counter Number Bit Settings

Bit 09 Bit 08 Counter Number

0 0 Counter 1

0 1 Counter 2

1 0 Counter 3

1 1 Counter 4

Class 1 Rate Value (Hz) Class 4 Rate Value (Hz)

Minimum -32,767 to +32,766 Minimum -1,000,000 to +999,999

Maximum (Min. Value +1) to +32,767 Maximum (Min. Value +1) to +1,000,000

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 139 140

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Rockwell-automation 1746-HSCE2 Multi-Channel High Speed Counter Module Manual de usuario Pagina 68