PM803F控制器,ABB使用手册PM803F
FCS模块通过计算脉冲来检测涡轮机速度
从涡轮轴上的磁性传感器接收。此外，它还保留了一个24位计时器值，对应于脉冲计数。它将这些值存储在缓冲区中，并设置数据可用状态位，用于通知MFP模块其已当前数据。FCS模块操作是自动的；它会持续更新计数并为MFP模块保留。为了使MFP模块与FCS模块协同工作，它需要其配置中的功能代码145。功能代码145定义模块地址、高速/低速报警和高速/低变化率警报。块输出的频率为以赫兹为单位的输入脉冲。频率计数器连续检查自身并在发生故障时通知MFP模块。
PM803F控制器MFP模块MFP模块是控制回路的控制模块并根据用户。MFP模块向FCS模块请求数据计算涡轮机速度。如果FCS模块具有可用数据，则将其发送给MFP模块。如果没有可用数据MFP模块必须发出另一个请求。如果涡轮机速度高于或低于MFP mod ule配置中的速度设定点，MFP模块将发送位置需求连接到HSS模块以调整节气门。这个过程在MFP模块的循环时间连续重复。
用户设置涡轮机速度限制和高/低速MFP模块和输入/输出模块配置期间的警报。此外，用户校准液压执行器和LVDT变压器。用户还启动自动调整解调器增益。比例增益手动调节（解调器增益也可以手动调谐）。MFP模块向操作员发送数据、模块状态和警报正常操作期间的接口。操作员可以监控系统操作并启动自动或手动控制通过操作员界面。
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.
