Configuring the TM5NS31 Bus Coupler

Configuring the TM5 Bus Cycle Time

Step	Action
1	In the Devices tree, double-click the respective TM5NS31 bus coupler to open the parameter editor and click the tab Device Parameters Parameters.
2	Expand the TM5Bus parameter group and set the CycleTime parameter to a value suitable for your application. Refer to the description below this table.
3	Compile the project by selecting the Build > Build menu command or pressing F11. By compiling, the modified cycle time value is transferred to the safety-related project in EcoStruxure Machine Expert - Safety. Refer to the section TM5 Bus Cycle Time Influences Safety Response Time below this table.

Step

Action

In the Devices tree, double-click the respective TM5NS31 bus coupler to open the parameter editor and click the tab Device Parameters Parameters.

Expand the TM5Bus parameter group and set the CycleTime parameter to a value suitable for your application. Refer to the description below this table.

Compile the project by selecting the Build > Build menu command or pressing F11.

By compiling, the modified cycle time value is transferred to the safety-related project in EcoStruxure Machine Expert - Safety. Refer to the section TM5 Bus Cycle Time Influences Safety Response Time below this table.

Best practice: In architectures with many TM5/TM7 modules (standard and safety-related) connected to one bus coupler, it may be necessary to increase the TM5 bus cycle time to ensure reliable communication. If one or several TM5/TM7 modules are temporarily unavailable (indication in the Device tree), the TM5 bus cycle may be too short. In such cases, increase the value to support more modules at the TM5 bus.

To achieve a higher system performance, decrease the bus cycle time value.

TM5 Bus Cycle Time Influences Safety Response Time

The value of the TM5 bus cycle time influences the calculation of the response time relevant parameters and therefore the response time of the safety function.

After modifying the TM5 bus cycle time in the TM5NS31 bus coupler parameters, you must build the standard project to transfer the modified time value to the safety-related project. Based on the modified value, you must recalculate (and adapt) the response time relevant parameters and the safety response time in EcoStruxure Machine Expert - Safety

The TM5 bus cycle time can also be modified via the IEC code of the standard application. The calculation of the response time relevant parameters, however, is based on the CycleTime value defined in the TM5NS31 bus coupler parameter editor.

If the actual TM5 bus cycle time differs from the value set in the TM5NS31 bus coupler parameters, observe the following:

WARNING

NON-CONFORMANCE TO SAFETY FUNCTION REQUIREMENTS

oIf the TM5 bus cycle time is set from within the IEC application program, make sure that the CycleTime parameter is set to the correct value in the TM5NS31 parameter editor.

oRecalculate the response time relevant parameters each time after editing the CycleTime value in the TM5NS31 parameter editor.

Failure to follow these instructions can result in death, serious injury, or equipment damage.