ICS TRIPLEX 9833脉冲输入卡件
跳闸，469显示默认为该消息。所有跳闸功能都会自动记录，并在发生时标记日期和时间。此外，所有行程都作为统计数据进行统计和记录，以便确定任何长期趋势。•报警：469报警功能可用于操作R4报警、R3辅助和R2辅助三个输出继电器的任意组合。当报警激活时，当输出继电器工作时，469面板上的相应LED（指示灯）将点亮。每个报警功能可编程为锁定或解锁。锁定报警功能激活后，必须按下重置键以重置该报警。如果导致报警的条件仍然存在（例如热RTD），则报警继电器将不会重置，直到该条件不再存在。另一方面，如果未锁定报警功能激活，则一旦导致报警的条件停止，该报警将自动复位（以及相关的输出继电器）。一旦发生警报，警报消息就会更新以反映警报，469显示默认为该消息。由于可能不希望将所有报警记录为事件，因此可以将每个报警功能编程为记录为事件或不记录为事件。如果报警被编程为记录为事件，当其激活时，将自动记录为日期和时间戳事件。•阻止启动：469阻止启动根据某些逻辑或算法阻止或禁止电机启动。块启动功能始终分配给块启动继电器。除跳闸继电器外，跳闸始终操作块启动继电器。如果导致跳闸的条件仍然存在（例如热RTD），或按下键时存在锁定时间，则在该条件不再存在或锁定时间到期之前，块启动继电器不会复位。当导致闭塞的条件停止时，闭塞功能总是解锁并立即复位。除了在跳闸时激活外，一旦电机停止，块也可能激活。有几个功能可以这样操作：启动/小时、启动间隔时间、启动抑制、重启块和469未编程。当块变为活动时，块消息会更新以反映该块（如果需要，完成锁定时间），并且屏幕默认为该消息。块通常不作为事件记录。但是，如果在块激活时检测到电机启动或启动尝试，则会自动记录为日期和时间戳事件。如果有人在接线端子之间短路并超越469保护以启动电机，则可能会出现这种情况。4.1.3继电器分配实践有六个输出继电器。其中五个继电器始终是非故障安全的，另一个（服务）是故障安全的并专用于阐明内部469个故障（这些故障包括设定点损坏、硬件组件故障、控制电源损失等）。其中一个输出继电器专用于块启动继电器；它专门用于阻止电机启动的功能。其余四个继电器可根据需要针对不同类型的功能进行编程。其中一个继电器R1跳闸拟用作主跳闸继电器。另一个继电器R4报警将用作主报警继电器。左侧的两个继电器R2辅助和R3辅助用于特殊要求。当将特征分配给R2和R3时，最好尽早决定需要什么，因为可能分配的特征可能会冲突。例如
trip and the 469 display defaults to that message. All trip features are automatically logged and date and time stamped as they occur. In addition, all trips are counted and logged as statistics such that any long term trends may be identified. • ALARMS: A 469 alarm feature may be assigned to operate any combination of three output relays, R4 Alarm, R3 Auxiliary, and R2 Auxiliary. When an Alarm becomes active, the appropriate LED (indicator) on the 469 faceplate will illuminate when an output relay(s) has operated. Each alarm feature may be programmed as latched or unlatched. Once a latched alarm feature becomes active, the reset key must be pressed to reset that alarm. If the condition that has caused the alarm is still present (e.g. hot RTD) the Alarm relay(s) will not reset until the condition is no longer present. If on the other hand, an unlatched alarm feature becomes active, that alarm will reset itself (and associated output relay(s)) as soon as the condition that caused the alarm ceases. As soon as an alarm occurs, the alarms messages are updated to reflect the alarm and the 469 display defaults to that message. Since it may not be desirable to log all alarms as events, each alarm feature may be programmed to log as an event or not. If an alarm is programmed to log as an event, when it becomes active, it is automatically logged as a date and time stamped event. • BLOCK START: A 469 Block Start prevents or inhibits the start of the motor based on some logic or algorithm. The Block Start feature is always assigned to the Block Start relay. In addition to the Trip relay(s), a trip always operates the Block Start relay. If the condition that has caused the trip is still present (e.g. hot RTD), or there is a lockout time when the key is pressed, the Block Start relay will not reset until the condition is no longer present or the lockout time has expired. Blocking features are always unlatched and reset immediately when conditions that caused the block cease. In addition to becoming active in conjunction with trips, a block may become active once the motor stops. There are several features that operate as such: Starts/Hour, Time Between Starts, Start Inhibit, Restart Block, and 469 Not Programmed. Block messages are updated to reflect the block when it becomes active (complete with lockout time if required) and the screen defaults to that message. Blocks are normally not logged as events. If however, a motor start or start attempt is detected when a block is active, it is automatically logged as a date and time stamped event. This scenario might occur if someone shorts across the block terminals and overrides the 469 protection to start the motor. 4.1.3 RELAY ASSIGNMENT PRACTICES There are six output relays. Five of the relays are always non-failsafe, the other (Service) is failsafe and dedicated to enunciate internal 469 faults (these faults include Setpoint Corruption, failed hardware components, loss of control power, etc.). One of the output relays is dedicated as the Block Start relay; it is dedicated to features that are intended to block motor starting. The four remaining relays may be programmed for different types of features depending on what is required. One of the relays, R1 Trip, is intended to be used as the main trip relay. Another relay, R4 Alarm, is intended to be used as the main alarm relay. The two relays that are left, R2 Auxiliary and R3 Auxiliary, are intended for special requirements. When assigning features to R2 and R3, it is a good idea to decide early on what is required since features that may be assigned may conflict. For example,
