3BDH000530R1處理器,PM803F使用書
HSS模塊將MFP模塊連接到伺服閥或I/H轉換器，為MFP模塊提供位置控制
燃料節(jié)流閥或蒸汽調節(jié)閥。HSS mod ule微處理器承擔工作負載。它能夠執(zhí)行借助模塊支持電路完成多項任務。微處理器提供所需的智能（固件）要中繼來自MFP模塊的位置需求，請讀取位置反饋信息，設定輸出目標，并呈現直接手動將模塊狀態(tài)信息發(fā)送給MFP模塊控制并執(zhí)行自檢診斷。有七個功能塊（見圖2-2）：
?輸入/輸出擴展器總線接口。
?狀態(tài)和數據緩沖區(qū)。
?微處理器。
?定位需求和輸出。
?位置反饋輸入。
?LVDT振蕩器。
3BDH000530R1處理器數字I/O所有支持電路塊都有助于微處理器指導模塊活動和控制接口環(huán)電源通過模塊安裝進入電路板裝置底板。輸入/輸出擴展器總線接口提供輸入/輸出與多功能處理器的模塊通信單元位置需求電路執(zhí)行位置需求的數字到模擬轉換，而輸出電路放大驅動伺服閥線圈的電流。A.
抖動振蕩器防止燃油閥在一個位置凍結。位置反饋塊解調來自的反饋LVDT次級并將其從模擬信號轉換為數字數據。頻率可選（400赫茲至15千赫）振蕩器為LVDT一次側提供勵磁電壓。
數字輸入/輸出電路為手動控制渦輪機節(jié)流閥提供隔離直流輸入。如果MFP和HSS模塊之間存在通信故障，則該電路使操作員能夠控制渦輪機速度。數字輸入/輸出電路提供了手動控制液壓系統(tǒng)的方法通過向伺服發(fā)送升高或降低信號來確定執(zhí)行器位置閥門或I/H轉換器。
The HSS module interfaces the MFP module to a servo valve or
I/H converter, providing the MFP module with position control
of a fuel throttle valve or steam governor valve. The HSS mod
ule microprocessor carries the workload. It is able to perform
multiple tasks with the help of the module support circuitry.
The microprocessor provides the intelligence (firmware) needed
to relay position demands from the MFP module, read position
feedback information, set targets for the output, and present
module status information to the MFP module, direct manual
control and perform self-check diagnostics. There are seven
functional blocks (see Figure 2-2):
?
I/O expander bus interface.
?
Status and data buffers.
?
Microprocessor.
?
Position demand and output.
?
Position feedback input.
?
LVDT oscillator.
Digital I/OAll the blocks of the support circuitry help the
microprocessor direct module activity and interface the control
loop. Power enters the board by way of the module mounting
unit backplane. The I/O expander bus interface provides I/O
module communication with the multi-function processor
module. The position demand circuitry performs digi
tal-to-analog conversion of position demands, while the output
circuitry amplifies the current driving the servo valve coils. A
dither oscillator prevents fuel valves from freezing in one posi
tion. The position feedback block demodulates feedback from
the LVDT secondary and converts it from an analog signal to
digital data. A frequency selectable (400 hertz to 15 kilohertz)
oscillator supplies the excitation voltage for the LVDT primary.
The digital I/O circuitry provides isolated DC inputs to manu
ally control the turbine throttle valve. If there is a communica
tion failure between the MFP and HSS modules, this circuitry
enables the operator to control turbine speed. The digital I/O
circuitry provides a means to manually control the hydraulic
actuator position by sending a raise or lower signal to servo
valve or I/H converter.
