MAST Task Cycle Time Calculation

General

The MAST task cycle time can be calculated before the implementation phase, if the desired PLC configuration is already known. The cycle time may also be determined during the implementation phase, using the system words %SW30 - %SW32.

Calculation Method

The following table shows how to calculate the MAST task cycle time.

Step	Action
1	Calculate the input and output internal processing time by adding the following times: MAST task system overhead time maximum communication system reception time and input management time for implicit inputs/outputs maximum communication system transmission time and output management time for implicit inputs/outputs
2	Calculate the program processing time according to the number of instructions and the type (Boolean, digital) of program.
3	Add together the program processing time, and the input and output internal processing time.

Step

Action

Calculate the input and output internal processing time by adding the following times:

MAST task system overhead time
maximum communication system reception time and input management time for implicit inputs/outputs
maximum communication system transmission time and output management time for implicit inputs/outputs

Calculate the program processing time according to the number of instructions and the type (Boolean, digital) of program.

Add together the program processing time, and the input and output internal processing time.