Digital Acoustics ESBx-110 Especificaciones descargar pdf (Pagina 103)

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101

Core Software Operation

ADDvantage-32 PLUS ● AC to DC Power Converter

3-23

Calibrate the pulse train into a user value by using the following equation:

A***:SPEED IN 1=

[(INPUT FREQ) × (EDGE/PULSE) + (TACH 1 ZERO)] × (60) × (π) × (TACH 1 RDia)

(TACH 1 EPR) × TACH 1 GRat

EDGES/PULSE = 1 is used for one phase, one edge applications

2 is used for one phase, two edge applications

4 is used for two phase, two edge applications

For example, to calibrate the frequency input into feet per minute from the following

machine data:

2-phase, 240 PPR pulse generator mounted on the motor shaft

3.0 gear ratio from motor to roll

Roll diameter of 24 inches

1. Select the tach type required by setting Y***:TACH 1 TYPE=Q***:2

PHASE-S or Q***:TWO PHASE.

2. Set X***:TACH EPR = 960. Pulses per revolution of the pulse generator

times four edges per pulse.

3. Set X***:TACH GRat = 3.0 per the given machine data.

4. Set X***:TACH RDia = 2, which is the diameter of the roll in process

units (feet).

3.11 COUNTERS

X*** Parameters Y*** Parameters Analog Data Table

X***:COUNT 1 CAL Y***:CTR 1 RESET A***:FOOTAGE 1

X***:COUNT 2 CAL Y***:CTR 1 HOLD A***:FOOTAGE 2

Y***:CTR 2 RESET A***:DIF FOOTAGE

Y***:CTR 2 HOLD

Y***:DIF-CTR RST

Y***:DIF-CTR HLD

The frequency inputs correspond to an associated counter. The counter increases one unit

for every pulse edge detected. The increment value is determined as follows:

A***:FOOTAGE 1 = (1, 2 or 4 Edges/Pulse) (Pulses) X***:COUNT 1 CAL

Where: 1 - Is used when the frequency input is set up for 1 PHASE,

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 465 466

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Digital Acoustics ESBx-110 Especificaciones Pagina 103

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