Flowserve Worcester Controls Electri-SAFE DataFlo Manual do Utilizador descarregar pdf (Página 10)

10 Electri-SAFE DataFlo Digital Electronic Positioner FCD WCAIM2048-01

Flow Control

Worcester Controls

4.4.11 Positioner Deadband

The display will alternately display dEbA and the deadband

value.

The deadband is used to prevent oscillations about a setpoint

because of small fluctuations in either the setpoint signal or

the position feedback signal. The deadband represents a plus

and minus percentage of the full range of either the input

signal or the feedback signal. Fixed deadband values can be

selected from 0.1 to 10.0 (percent) of range. When the DOWN

switch is pressed when the right most digit is selected, the

display will show Auto. Pressing SEL while on that screen will

select Auto deadband.

A deadband setting of Auto will allow constant automatic

adjustment of the deadband in an adaptive fashion as required

for best performance. This is the recommended setting. The

lower Auto default value is .5 but this can be changed with

the manual setting. Whatever value has been set for the

manual deadband setting, becomes the lower limit for the

Auto deadband mode.

4.4.12 Loss-of-Signal Position and Delay Time

The display will alternately display SPOS and the position the

valve will move to if there is a loss of signal. A loss-of-signal

condition occurs in either of two situations: 1) When the

positioner is in analog position control and the input signal is

less than 2 mA; or 2) When the positioner is controlled by the

serial data link (digital control) and no signal has been

received within the SPt time period.

When a loss of signal occurs in the analog control mode, the

positioner will immediately go to the SPOS position. A HOld

option specifies the positioner is to hold its current position.

The positioner will hold the SPOS position until a valid analog

input signal is present for the SPt delay period. If the SPt

parameter is set to 0 seconds, restoration of the signal will

cause the positioner to work as normal with no time delay.

A loss of signal in PC CMD control mode means the

positioner has not received a valid command within the SPt

time period. In that case, the positioner will immediately go to

the SPOS position. A HOld option specifies the positioner is

to hold its current position. The positioner will hold the SPOS

position until a valid digital position command is received.

The display will alternately display SPt and the delay time (in

seconds). The time range is 0 to 9999 seconds. A time of 0 in

analog control mode disables the loss-of-signal option. A time

of 0 in digital control mode effectively disables the loss-of-

signal option by allowing an infinite time between received

commands. In digital-control mode, non-zero SPt time values

less than three seconds will use three seconds as the delay.

4.4.13 Power-On Position and Delay Time

When power is first applied to the positioner and the unit is in

analog signal control mode, it will go to the position specified

by the PPOS parameter for a time specified by the PPt

parameter. During that time, any input signal is ignored.

If the unit is in PC Cmd control mode and there is a valid PC

signal, the unit will respond to the signal immediately,

otherwise, it will go to the power on position for the PPt time

and then go to the SPOS position for the SPt time.

The display will alternately display PPOS and the position (in

percent) the valve will move to when power is first applied or

when power is restored. The actuator will hold that position

for the time specified in the next step. The position range is

0.0 to 100.0% and HOLd. A HOLd option specifies the

positioner is to hold the last position (i.e., the actuator will

not move).

The display will alternately display PPt and the time (in

seconds) that the PPOS position will be held. During that

time, the positioner will ignore any input signal and will hold

the PPOS position. The time range is 0 to 9999 seconds. A

time of 0 disables this option such that the positioner will

immediately respond to the input signal when power is first

applied or restored.

Free Free

Linear Curve #1 Curve #2 Free Free

Curve 1:25 1:50 Curve #3 Curve #4

Parameter (Lin) (FrE1) (FrE2) (FrE3) (FrE4)

SL 0 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %

SL 1 5.0 % 0.8 % 0.3 % 5.0 % 5.0 %

SL 2 10.0 % 2.1 % 0.8 % 10.0 % 10.0 %

SL 3 15.0 % 3.2 % 1.5 % 15.0 % 15.0 %

SL 4 20.0 % 4.9 % 2.6 % 20.0 % 20.0 %

SL 5 25.0 % 6.5 % 3.7 % 25.0 % 25.0 %

SL 6 30.0 % 8.4 % 5.0 % 30.0 % 30.0 %

SL 7 35.0 % 10.7 % 6.6 % 35.0 % 35.0 %

SL 8 40.0 % 13.2 % 8.4 % 40.0 % 40.0 %

SL 9 45.0 % 15.7 % 10.9 % 45.0 % 45.0 %

SL10 50.0 % 18.7 % 13.5 % 50.0 % 50.0 %

SL11 55.0 % 22.6 % 16.5 % 55.0 % 55.0 %

SL12 60.0 % 27.2 % 20.3 % 60.0 % 60.0 %

SL13 65.0 % 33.4 % 25.0 % 65.0 % 65.0 %

SL14 70.0 % 40.0 % 31.1 % 70.0 % 70.0 %

SL15 75.0 % 46.0 % 36.8 % 75.0 % 75.0 %

SL16 80.0 % 53.8 % 45.4 % 80.0 % 80.0 %

SL17 85.0 % 63.2 % 54.4 % 85.0 % 85.0 %

SL18 90.0 % 73.7 % 67.5 % 90.0 % 90.0 %

SL19 95.0 % 86.2 % 85.0 % 95.0 % 95.0 %

SL20 100.0 % 100.0 % 100.0 % 100.0 % 100.0 %

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

Comentários a estes Manuais

Sem comentários

Flowserve Worcester Controls Electri-SAFE DataFlo Manual do Utilizador Página 10

Comentários a estes Manuais

Manuais e produtos relacionados com Hardware Flowserve Worcester Controls Electri-SAFE DataFlo