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After making any changes to this tab, click on ok. The Network Configuration tool recalculates the Macrocycle Duration. If you have changed an existing time slot, the changes are reflected in devices that already use the time slot. Time Slot Lengths and Macrocycle Duration The calculated Macrocycle Duration, displayed on this screen, defaults to 150mS. The Macrocycle Duration is the smallest common multiple of all the time slot periods. Of the time slots listed, most also have been assigned a period of 150mS. However, the period assigned to discrete inputs and discrete outputs is 50mS. So the discrete inputs and discrete outputs will be exchanged three times during the Macrocycle period.Up to 16 alphanumeric characters; no spaces or hyphens.For synchronous exchanges, no zero period allowed. For asynchronous exchanges, if period is zero, the COMV period is the same as the duration of the macrocycle.(Synchronous time slots only) the moment the time slot begins.
The definitions of transport time slots are used to group similar data. All of the data placed within a group will have the same exchange parameters. To display the defined transport time slots, click on the Transport Time Slots tab. For each defined transport time slot, the screen lists its name, type, period, start, and end. Predefined Time Slot names and their uses are: – SYST (System). There is one status variable for each device on a network. – DI for discrete inputs, their validators, and chatter data (if chatter is selected). – DO for discrete outputs and blink data (if blink selected). – AI contains analog inputs, their validators, and AT (alarm) data. – AO contains analog outputs. – CONT intercontrol. – TIME carries the network clock. – CYCLE end of macrocycle. It is possible to create new time slots and modify or delete existing time slots to adapt the flowrate on the network segment. (If at least one remote I/O rack of the network segment is locked, the time slots cannot be modified or deleted). Note that a time slot cannot be deleted if it is currently included in the predefined exchanges or in the MPS exchanges. For each transport time slot, you can edit the following parameters.