Dear all,

I got one backup from customer using s7 300 with siemens drives and op177b in profibus network..

why does op177b is configured in profibus network using gsd file ??

Hello,

They uses "DP direct keys".

Here a link to manual:

SIMATIC HMI WinCC flexible 2008 Communication Part 1

See chapter 2.3

Best regards,

Wizard

hi,

thank you...

but i could not find how to link keys with io ...is it required to configure or when we press for eg.f11 key in op177b consecutive bit goes high without any configuration??

in the backup i didnt see the ios used in the plc logic and in hmi...instead the buttons are configured with memory bits....

Hello BALAKRISHNAN92,

Other test after Wizard you can create a VAT table in STEP7 with the respective input from I 33.0 to I 36.7 and read all the direct keys, but it's a little longer.