Echelon I/O Model Reference for Smart Transceivers and Neu Manuel d'utilisateur télécharger pdf (Page 203)

I/O Model Reference 193

Timer/Counter Pulsetrain Output

The following sections list the possible choices for pulsetrain repetition

frequencies for pulsewidth short output and pulsecount output.

Series 3100 Pulsetrain Output

For pulsewidth long output, Table 70 lists the possible choices for pulsetrain

repetition frequencies. The table lists the values for a Series 3100 device with a

10 MHz input clock (the values scale for other clock rates).

Table 70. Series 3100 Timer/Counter Pulsetrain Output at 10 MHz

Clock Select Frequency Period

0 76.3 Hz 13.1 ms

1 38.1 Hz 26.2 ms

2 19.1 Hz 52.4 ms

3 9.54 Hz 105 ms

4 4.77 Hz 210 ms

5 2.38 Hz 419 ms

6 1.19 Hz 839 ms

7 0.60 Hz 1678 ms

To Calculate for Other Clock Rates:

•

Period =

⎟

⎠

⎞

⎜

⎝

⎛

InputClock

tClockSelec )(

131072

ClockSelect

= 0..7

InputClock

in MHz

Period

in seconds

•

Frequency = 1 /

Period

Frequency

in Hertz

Period

in seconds

Series 5000 Pulsetrain Output

For pulsewidth long output, Table 71 on page 194 lists the possible choices for

pulsetrain repetition frequencies.

The resolution and range values in Table 71 apply to all system clock settings,

that is, they do not scale with changes to the system clock.

1 2 ... 198 199 200 201 202 203 204 205 206 207 208 209

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