Horner-apg XLt OCS Manual de usuario descargar pdf (Pagina 48)

100

CH. 10 MAN0878-04-EN

August 12, 2009 Page 48 of 100 ECN # 979

The stepper provides two Boolean registers to provide stepper status

Ready/Done

A high indication on this register (%I30) indicates the stepper sequence can be started (i.e. not

currently busy).

Error

A high indication on this register (%I31) indicates that one of the analog parameters specified

above is invalid or the stepper action was aborted before the operation was complete. This

The stepper requires one discrete register (%Q1) to control the stepper action. Setting this register starts

the stepper cycle. This register must remain set to complete the entire cycle. Clearing this register

before the cycle is complete aborts the step sequence and sets the error bit.

Note that setting the PLC mode to Stop while the stepper is in operation causes the

stepper output to immediately drop to zero and the current stepper count to be lost.

Note that stepper output level may cause damage or be incompatible with some motor

driver inputs. Consult drive documentation to determine if output level and type is

compatible.

10.5 PWM functions register map

%AQ1 Start Frequency

%AQ2

PWM1 Duty Cycle (32-

bit)

HSC1

Preset Value

Run Frequency

%AQ3

%AQ4

PWM2 Duty Cycle (32-

bit)

HSC2

Preset Value

Accel Count

(32-bit)

%AQ5

%AQ6

PWM Prescale

(32-bit)

Run Count

(32-bit)

%AQ7

%AQ8

PWM Period

(32-bit)

Decel Count

(32-bit)

%Q1 Run

%I30 Ready/Done

%I31

Error

10.6 PWM Examples

All of the PWM examples use the following formula.

Frequency =

()

tPeriodCounescale ×+1Pr

000,000,16

Example 1

To get a 50% Duty Cycle @ 10 kHz waveform on PWM1:

Set %AQ1-2 = 50 (duty cycle count)

Set %AQ5-6 = 15 (prescale count)

Set %AQ7-8 = 100 (period count)

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 99 100

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Horner-apg XLt OCS Manual de usuario Pagina 48

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