Digital Acoustics ESBx-110 Especificaciones descargar pdf (Pagina 213)

100

101

Control Block Description

ADDvantage-32 PLUS

4-83

2. Outputs

OUT: Analog

RMP: Bit

3. Implementation

ZERO

bit is low, OUT = 0. When

ZERO

bit goes high, OUT ramps to REF by the

UP or DWN ramp rates. (Highest bit priority.)

If the RES bit is high, OUT = REF. (Second in priority.)

If the

HLD

bit is low, OUT is held at its present value. The rounding continues to

prevent a step response. When

HLD

goes high, OUT ramps to REF by the appropriate

rate.

The UP/DWN inputs are entered in units/second.

The following holds true while the

HLD

ZERO

bits are set high and the RES bit is low:

If REF is increasing faster than UP, the RMP bit is set high and OUT ramps at the UP

value. If UP is equal to zero, then the OUT ramps with the REF. If REF decreases faster

than DWN, the RAMP bit is set high and OUT ramps at the DWN value. If DWN is

equal to zero, then the OUT ramps with the REF. If neither of the preceding conditions

are true, the RMP bit is set low and OUT equals REF.

The RND input determines the amount of S-ramp to be applied to the OUT. This is

implemented as a low pass filter to the linear ramp. The RND value is entered as a time

constant in seconds. If RND < .005, no rounding will take place.

NOTE

On powerup, OUT = REF.

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Digital Acoustics ESBx-110 Especificaciones Pagina 213

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