BONFIGLIOLI act 401 Instruções de Operação descarregar pdf (Página 62)

06/05 61

5.5 Digital inputs EM-SxIND for speed sensor EM-ENC

The three digital inputs of the EM-IO-02 expansion module can be set via the parame-

ter

Operation mode Speed sensor 2 493 and selection of the corresponding operation

mode for the evaluation of a unipolar 24V two-channel speed sensor (incremental

speed sensor).

For parameter analog mode 553, the additional operation mode 4 – abs. value speed

sensor 2 can be selected, which can output the abs. value of the speed sensor si

nal 2

in the range from 0.00 Hz to

maximum frequency 419 via the multifunctional output

MFO1.

Assignment of the inputs:

− Digital input EM-S2IND: track A

− Digital input EM-S3IND: track B

− Digital input EM-S1IND: corresponding to the operation mode as a reference im-

pulse

With the help of parameter

Operation mode Speed sensor 2 493, the following opera-

tion modes are available:

Operation mode Function

0 -Off

Speed measurement is not active; the di

ital inputs are

available for further functions.

4 -Quadruple evaluation

Two-channel speed sensor with reco

nition of direction

of rotation via track signals A and B;

four signal edges are evaluated per division mark.

104 -

Quadruple evaluation

inverted

s operation mode 4; the actual speed value is in-

verted. (Alternative to exchanging the track signals).

1004 -

Quadruple evaluation

with reference im-

pulse

Two-channel speed sensor with reco

nition of direction

of rotation via track signals A and B;

four signal edges are evaluated per division mark;

the reference impulse is used for sensor monitoring.

1104 -

Quadruple evaluation

inverted with refer-

ence impulse

s operation mode 1004; the actual speed value is

inverted.

(Alternative to exchanging the track signals).

5.5.1 Division marks

he number of increments of the connected speed sensor can be ad

usted via the

parameter

Division marks speed sensor 2 494. The number of division marks of the

speed sensor is to be selected according to the speed range of the application.

The maximum number of division marks S

max

is defined by the limit frequency of

max

= 150 kHz of the digital inputs EM-S2IND (track A) and EM-S3IND (track B).

max

min60

000150

HzS ⋅=

max

= Max. speed of the motor in RPM

To ensure a good true running of the drive mechanism, a sensor si

nal must be

evaluated at least every 2 ms (si

nal frequency f = 500 Hz). The minimum number o

division marks S

min

of the incremental speed sensor for a required minimum speed

min

can be calculated from this requirement. The evaluation of four si

nal ed

es pe

mark is firmly defined in the function of speed sensor 2.

min

min60

500

HzS

⋅

⋅=

min

A =

Min. speed of the motor in RPM

4 (quadruple evaluation)

Parameter Setting

No. Description Min. Max. Fact. sett.

494 Division marks speed sensor 2 1 8192 1024

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 72 73

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