Network Cycle Time: Mono Task Application

At a Glance

The network cycle time for a mono task application is calculated for the following configuration:

the bus length is 1 Km,
the values corresponding to silence time, slot time and bandwidth are the default values (automatic mode).

Calculation of Network Cycle Time

For an application where all devices are configured in the same task, the value of the network cycle time of the task, in milliseconds, is obtained using the following formula (provided for information purposes):

Value of Coefficient K

Coefficient K will be defined as follows:

Coefficient K	Family	Device
0.5	TBX	Discrete
0.9	TBX	Analog
0.4	Momentum	Discrete
0.6	Momentum	Analog
0.6	ATV-58	All
1.5	TSX 37/57	All
0.6	AS-i gateway	TSX SAP 10
1.5	Magelis	All
0.4	STD_P	FRD
0.6	STD_P	FSP
1.5	STD_P	FED

Example

The example is configured as follows:

All the elements are configured in the application's MAST task.
The configuration consists of:
- 10 discrete TBXs,
- 11 analog TBXs,
- 12 discrete Momentums.

The MAST task cycle time is calculated as follows:

TCR_MAST = 1.45 + ((0.5 x 10) + (0.9 x 11) + (0.4 x 12)) = 21.15 ms

The resulting network cycle time value is 21 ms.