HW Config
Integral part of
STEP 7
for configuring hardware.
Identification and maintenance data
Identification data (I data) is information on the module, some of which are printed onto the
module housing. I data are for reading only.
Maintenance data (M data) is plant-dependent information such as installation location,
installation date etc. M data are created during configuration and written onto the module.
Identification and maintenance data (I&M) is information stored in a module to support you in
● Checking the system configuration
● Locating hardware modifications of a system
● Correcting errors in a system
Modules can be uniquely identified online by means of the I&M data.
Link Active Scheduler
The Link Active Scheduler (LAS) is a function of the FOUNDATION Fieldbus Link Master. The
LAS uses schedules to control and coordinate data transmission between the FF devices on
the FF segment. The Compact FF Link assumes the LAS function in normal operation. Suitable
FF devices (Link Master) could assume the LAS function in principle.
Link Master
-> FF Link Master
Master
When a master is in possession of the token, it can send data to other nodes and request data
from other nodes (= active node). DP master are, for example, the CPU 315-2 DP or IM 308‑C.
Parameter assignment
Parameter assignment is the transfer of slave parameters from the master to the slave.
PNO
PROFIBUS User Organization
Power supply
A power supply feeds power to the field devices and to their connected distributed process I/
O.
Glossary
Compact FF Link
Operating Instructions, 03/2015, A5E35651552-AA 95
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