MAN0878-09-EN_XLE_XLT_UserManual
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12.4.4 HSC (High Speed Counter)
When either Q1 or Q2 is configured for HSC operation, HSC1 or HSC2 totalize functions are
extended to allow respective direct output control based on a comparison of the current
count and a preset value (PV). See totalize in the HSC section above for more information.
12.4.5 Stepper Function
When Q1 is configured for Stepper, the stepper function is enabled at the Q1 output. Only one
stepper function and output is available.
NOTE: When Q1 is configured for stepper operation, Q2 operation is limited to direct digital
output.
The Stepper requires five parameters (%AQs) to be set for operation. These parameters may
be set at run-
time but are ‘latched’ when the stepper is commanded to start.
Start Frequency (cycles per second
)
This value (%AQ1) sets the frequency for the first cycle during the acceleration phase
and the frequency of the last cycle during the deceleration phase. When an acceleration
or deceleration count is specified, the Start Frequency must be greater than zero (0)
and must not exceed the run frequency or an error is generated.
Run Frequency (cycles per second)
This value (%AQ2) sets the frequency for the last cycle during the acceleration phase,
the consistent frequency during the run phase, and the frequency of the first cycle
during the deceleration mode. The Run Frequency must be greater than zero (0) and
must not exceed 5000 cycles/sec. or an error is generated.
Acceleration Count
This value (%AQ3-4) sets the number of cycles to occur within the acceleration phase.
The frequency of the cycles within this mode will vary linearly between the specified
Start and Run frequency. The Accel count must not equal 1 or an error is generated.
Setting this value to zero (0) disables this phase.
Run Count
This value (%AQ5-6) sets the number of cycles to occur within the run phase. The
frequency of the cycles within this mode is constant at the specified Run frequency. The
Run count may be any value. Setting this value to zero disables this phase.
Deceleration Count
This value (%AQ7-8) sets the number of cycles to occur within the deceleration phase.
The frequency of the cycles within this phase will vary linearly between the specified
Run and Stop frequency. The Decel count must not equal 1 or an error is generated.
Setting this value to zero disables this phase.