Festo PROFIBUD-DP, Elektronics Manual

Page: 52 / 154

1. Installation CPV−DI02 and CPV−CS02
1−38
Festo P.BE−CPV−DI02−EN en 0704NH
1.7.2 Saving the string assignment
W a r nin g
Be very careful if the string assignment of your CPI system
is modified at a later stage:
·
After saving the string assignment, check the address
assignments of your CPI system before starting user
programs.
You will then avoid addressing faults in the case of
incorrectly fitted CPI modules.
String assignment The CPV Direct saves the type and the sequence of the con
nected CPI modules for the CP string (string assignment).
The saved string assignment enables the CPV Direct to avoid
faults in connecting, and thus addresssing. It checks auto
matically to see if the current string assignment is the same
as the saved assignment. A distinction is made here between
the following test phases:
testing during the start−up phase (see section 1.8)
testing during operation (see section 1.9).
When the status LEDs on all the CPI modules light up, the
CPIsystem is prepared for commissioning. You can now
commission the CPI system.