Time-Triggered Shared Variable Page (RT Module)
Select Time-Triggered from the Variable Type pull-down menu of the Shared Variable Properties dialog box to access this page.
Use this page to configure a new time-triggered shared variable or edit the configuration of an existing time-triggered shared variable.
This page includes the following components:
- Variable Communication Style—Specifies the communication style for the shared variable. You can choose from one of the following communication styles.
- As part of the shared memory blocks—The time-triggered shared variables under an RT target are all transmitted during a shared memory block in the communication cycle of the time-triggered network. You can specify an offset from the start of the communication cycle for when you want to begin the transmission of the shared memory blocks of all the RT targets on the time-triggered network. The time-triggered network transmits the shared memory blocks for each RT target one after another.
- During a dedicated time slot within the network cycle—The time-triggered shared variables under an RT target are transmitted individually during a specific time slot in the network cycle that you specify. You can specify an offset from the start of the communication cycle when you want to begin the transmission of each time-triggered shared variable. You also can rearrange the order in which the shared variables are transmitted.
- Microseconds into the network cycle—Specifies an offset from the start of the communication cycle of the time-triggered network when the time-triggered shared variable transmits data.
- Size of the Variable—Specifies the maximum string length for a time-triggered shared variable of string type or the number of array elements for a shared variable of array type.