Woodward ProAct P Series FL, Инструкция по установке, программированию и устранению неисправностей, Страница: 37 / 110

Manual 26659 ProAct P-Series FL Position Controller
Woodward 27
Figure 3-2. Functional Overview
Position Command Signal
The ProAct P-Series FL can accept either a single position command or a
redundant position command. A redundant command uses two position
commands, one as the primary command and one as a backup. If the primary
should fail, the unit could continue to run using the backup command. The
command source can be sent over CAN, as a PWM command signal input, or an
analog (4 to 20) mA, (0 to 5) V (dc), or (0 to 200) mA command signal input,
depending on how the software application is configured.
The position demand input can be optionally set to use a non-linear mode which
provides a 5-point curve relationship between position signal and desired
position. The same curve relationship will be used for any demand input type.
The unit can be configured to either alarm or shut down on detection of a position
command failure (loss of all position command inputs). Failure of one command
source, when redundant commands are used, will result in an alarm and the unit
will continue to operate using the remaining healthy command signal.
PWM Position Command
The PWM position command input will function with either a low-side open
collector or push-pull driver. It will handle a PWM frequency range from 300 Hz to
2000 Hz at amplitudes ranging from 4.0 V up to battery voltage. The scaling from
duty cycle to commanded position is user-configurable.