MVME1604014说明书在线阅读工控DCS系统

速度设置点也可以从任一Modbus链路直接输入，但是，允许的范围在较小和较大调速器速度设置之间。如果机组正在驱动发电机且机组处于在线状态，则允许的设定值范围限制在较小负载和较大调速器设定值之间。速度设定点和Modbus输入速度设定点都可通过通信链路获得，为直接输入的Modbus值提供反馈。一旦涡轮机在较低调速器速度或额定速度下进行速度控制，可通过速度屏幕（屏幕4）、速度设定点上升或下降触点输入的ADJUST UP或DOWN前面板键调整速度设定点，或通过Modbus链路发出命令。此外，可以使用设置点显示器上的ENTER键或通过通信链路直接输入设置点（见上文的直接设置点输入）。以下速度控制指示可通过Modbus链路获得：控制中的速度PID和较低调速器或以上的速度。除这些指示外，还可获得速度设定点、实际涡轮机速度、速度传感器#1输入、速度传感器#2输入和速度控制PID输出模拟值。

The Speed setpoint can also be directly entered from either of the Modbus links, however, the allowed range is between the minimum and maximum governor speed settings. The allowed setpoint range is limited between the minimum load and the maximum governor settings if the unit is driving a generator and the unit is on-line. Both the speed setpoint and the Modbus Entered Speed setpoint are available over the communication link to provide feedback for directly entered Modbus values.Once the turbine is in speed control at minimum governor speed or rated speed, the speed setpoint can be adjusted with the ADJUST UP or DOWN front panel keys from the Speed screen (screen 4), Speed Setpoint Raise or Lower contact inputs, or commands through a Modbus link. In addition the setpoint can be directly entered using the ENTER key from a Setpoint display or through the communication links (see Direct Setpoint Entry above). The following speed control indications are available through the Modbus links: Speed PID in Control and Speed at or above Min Gov. In addition to these indications the Speed Setpoint, Actual Turbine Speed, Speed Sensor #1 Input, Speed Sensor #2 Input, and Speed Control PID Output analog values are also available.

来源：瑞昌明盛自动化设备有限公司