Festo Контроллеры двигателя SFC-LAC - Manual (Page 45)

1. System summary
1−23 Festo GDCP−SFC−LACI−DN−EN en 0812NH
1.2.2 Festo handling and positioning profile (FHPP)
Customised for handling and positioning tasks, Festo
developed an optimised data profile, the Festo Handling and
Positioning Profile (FHPP)".
FHPP enables uniform sequence control and programming for
the various field bus systems and controllers from Festo.
Communication via the field bus can take place cyclically
(I/OĂMessaging) or acyclically (Explicit Messaging).
Mixed operation is typical:
ć Commissioning and application parameters are
transmitted via Explicit Messaging".
ć Time−critical sequence control is performed according to
FHPP Standard (I/O Messaging", 8 bytes I/O).
ć Parameterisation in operation is done according to
FHPP−FPC (I/O Messaging", 8 bytes I/O) or via
ExplicitĂMessaging".
FHPP standard
FHPP standard is used for time−critical sequence control.
Here there are two FHPP operation modes:
ć Record selection:
The higher−level control (PLC) selects positioning records
(positioning tasks) stored in the SFC−LACI.
ć Direct mode:
The tasks are formulated directly in the master’s cyclical
output data. Possible are positioning mode, continuous
setpoint specification and gasoline operation.
Detailed information on the FHPP standard can be found
starting at section 5.5.