3BSE018298R1信号输出卡件
TVAs的CPU输入扫描：CPU将输入数据从FBC到PLC参考表的双端口存储器。时间长度取决于要扫描的I/O数据量。应用程序的CPU逻辑执行：执行用户所需的时间应用程序。该时间取决于逻辑量以及PLC CPU中其他非抢占操作的需求和优先级，如另一次I/O扫描和通信窗口时间。
TVAs的CPU输出扫描：CPU传输输出数据所需的时间
从PLC参考表到FBC的双端口存储器。时间长度取决于要扫描的I/O数据量。
配置同步I/O扫描
要设置同步I/O扫描：
1.在网络配置工具中，指定FIP的网络访问方法总线控制器为同步（/时隙）。
2.将CPU扫描模式配置为微循环模式。
配置微循环的周期。微循环周期的典型值为：
等于PLC中设置的最快同步扫描周期。4.使用硬件配置工具从PLC定义同步扫描集CPU扫描设置选项卡。
–将FIP总线控制器的物理位置（机架/插槽）标识为同步来源
5.从FIP总线控制器的扫描选项卡，将所需时隙连接到同步扫描集。
与时隙关联时，时隙的周期必须相同同步扫描集。此外，还可以附加来自其他FIP的时隙
总线控制器到同一同步时隙。但只能有一个FBC
配置为同步源。也可以将本地PLC I/O数据连接到同步扫描集。
如果要同步输入和输出，请指定默认时间
时隙DI和DO与一个同步扫描集，时隙AI和AO与另一个同步扫描集。
如果只想与输入同步，则将DI分配给同步扫描集，将AI分配给另一个同步
CPU Input Scan of TVAs: The time necessary for the CPU to transfer the input data from
the dual–port memory of the FBC to the PLC reference tables. The length of time de- pends on the amount of I/O data to be scanned.
CPU Logic Execution of Application Program: The time necessary to execute the user
application program. This time depends on the amount of logic and the needs and priorities of other non–preemptive operations in the PLC CPU, such as another I/O scan and
the communications window time.
CPU Output Scan of TVAs: The time necessary for the CPU to transfer the output data
from the PLC reference tables to the dual–port memory of the FBC. The length of time
depends on the amount of I/O data to be scanned.
Configuring Synchronous I/O Scanning
To set up Synchronous I/O Scanning:
1. In the Network Configuration tool specify the Network Access method for the FIP
Bus Controller as Synchronous (/time slot).
2. Configure the CPU sweep mode as MICROCYCLE mode.
3. Configure a period for the microcycle. A typical value for the microcycle period is
equal to the period of the fastest synchronous scan set in the PLC.
4. Define a synchronous scan set using the Hardware Configuration tool, from the PLC
CPU Scan Set tab.
– Identify the physical location (rack/slot) of the FIP Bus Controller as the Sync
Source.
5. From the Scanning tab for the FIP Bus Controller, attach the desired time slot(s) to
the Synchronous Scan Set.
The periods of the time slots must be identical when associating to the same
synchronous scan set. In addition, it is possible to attach time slots from other FIP
Bus Controllers to the same synchronous time slot. But only one FBC can be
configured as the Sync Source. It is also possible to attach local PLC I/O data to a
synchronous scan set.
If you want to synchronize both the inputs and the outputs, assign the default time
slots DI and DO to one sync scan set and the time slots AI and AO to another sync
scan set.
If you want to synchronize to inputs only, assign DI to a sync scan set and AI to
another sync
