42Instructions for F5 PROFINET operator to Simatic S77. Instructions for F5 PROFINET operator at Simatic S7Simatic is a product group of Siemens AG. This short overview make no claim to be exhaustive, nor replace theoriginal documents of the company Siemens to this issue!Please note in particular the issue project design of the clock synchronization (PROFINET IO) in the S7 help.The project design of a synchronous PROFINET communication (PROFINET IO-IRT) is more extensive than theproject design for a PROFINET IO-RT communication. The following example is used to specify the steps for theproject design of such IRT communication. All pictures are screenshots of a Siemens Step7-Simatic-Managersoftware with the version.7.1 Standard project designFrom software V2.8 of the F5 PROFINET operator the following communication functions are possible:• Exchange acyclic data (parameter channel) complying to PROFIDRIVE profile• Exchange cyclic data (process data channel) with PROFINET IO-RT or PROFINET IO-IRTAll informations about the available functions of a PROFINET device the PROFINET controller gets out ouf thedevice‘s device description file (GSDML) of this slave. Therefore first it is necessary to import the device descrip-tion file of the slave into the control system. At the Siemens Simatic S7 this is done via HW Config at the menuitem Options →GSD-files install…