PM803F控制器,ABB使用手冊(cè)PM803F
FCS模塊通過(guò)計(jì)算脈沖來(lái)檢測(cè)渦輪機(jī)速度
從渦輪軸上的磁性傳感器接收。此外，它還保留了一個(gè)24位計(jì)時(shí)器值，對(duì)應(yīng)于脈沖計(jì)數(shù)。它將這些值存儲(chǔ)在緩沖區(qū)中，并設(shè)置數(shù)據(jù)可用狀態(tài)位，用于通知MFP模塊其已當(dāng)前數(shù)據(jù)。FCS模塊操作是自動(dòng)的；它會(huì)持續(xù)更新計(jì)數(shù)并為MFP模塊保留。為了使MFP模塊與FCS模塊協(xié)同工作，它需要其配置中的功能代碼145。功能代碼145定義模塊地址、高速/低速報(bào)警和高速/低變化率警報(bào)。塊輸出的頻率為以赫茲為單位的輸入脈沖。頻率計(jì)數(shù)器連續(xù)檢查自身并在發(fā)生故障時(shí)通知MFP模塊。
PM803F控制器MFP模塊MFP模塊是控制回路的控制模塊并根據(jù)用戶。MFP模塊向FCS模塊請(qǐng)求數(shù)據(jù)計(jì)算渦輪機(jī)速度。如果FCS模塊具有可用數(shù)據(jù)，則將其發(fā)送給MFP模塊。如果沒(méi)有可用數(shù)據(jù)MFP模塊必須發(fā)出另一個(gè)請(qǐng)求。如果渦輪機(jī)速度高于或低于MFP mod ule配置中的速度設(shè)定點(diǎn)，MFP模塊將發(fā)送位置需求連接到HSS模塊以調(diào)整節(jié)氣門(mén)。這個(gè)過(guò)程在MFP模塊的循環(huán)時(shí)間連續(xù)重復(fù)。
用戶設(shè)置渦輪機(jī)速度限制和高/低速M(fèi)FP模塊和輸入/輸出模塊配置期間的警報(bào)。此外，用戶校準(zhǔn)液壓執(zhí)行器和LVDT變壓器。用戶還啟動(dòng)自動(dòng)調(diào)整解調(diào)器增益。比例增益手動(dòng)調(diào)節(jié)（解調(diào)器增益也可以手動(dòng)調(diào)諧）。MFP模塊向操作員發(fā)送數(shù)據(jù)、模塊狀態(tài)和警報(bào)正常操作期間的接口。操作員可以監(jiān)控系統(tǒng)操作并啟動(dòng)自動(dòng)或手動(dòng)控制通過(guò)操作員界面。
The FCS module detects turbine speed by counting pulses it
receives from a magnetic pickup on the turbine shaft. Additionally, it keeps a 24-bit timer value corresponding to the period of
the pulse count. It stores these values in a buffer and sets a
data available status bit to notify the MFP module that it has
current data. FCS module operation is automatic; it continuously updates the count and holds it for the MFP module.
For the MFP module to work with the FCS module, it requires
function code 145 in its configuration. Function code 145
defines the module address, high/low speed alarms and high/
low rate of change alarms. The block output is frequency of
input pulses in hertz. The frequency counter continuously
checks itself and notifies the MFP module if a failure occurs.
MFP Module
The MFP module is the controlling module of the control loop
and controls turbine speed according to the control strategy of
the user. The MFP module requests data from the FCS module
to calculate turbine speed. If the FCS module has data available, it sends it to the MFP module. If there is no data available
the MFP module must make another request. If the turbine
speed goes above or below the speed set point in the MFP module configuration, the MFP module will send a position demand
to the HSS module to adjust the throttle valve. This process
repeats continuously at the cycle time of the MFP module.
The user sets the turbine speed limits and high/low speed
alarms during configuration of the MFP module and I/O modules. Additionally, the user calibrates the hydraulic actuator
and LVDT transformer. The user also initiates auto tuning of
the demodulator gain. Proportional gain is tuned manually
(demodulator gain can also be tuned manually). The MFP module sends data, module status and alarms to the operator
interface during normal operation. The operator can monitor
system operation and initiate automatic or manual control
through the operator interface.
