Operating instructions

18 08/06
4.8.2 SYNC telegram, generation
If synchronous PDO’s have been created on the system bus, the master must send the
SYNC telegram cyclically. If an frequency inverter has been defined as a system bus
master, the latter must generate the SYNC telegram. The interval for the SYNC tele-
g
ram of an frequency inverter defined as the system bus master is ad
j
ustable. The
SYNC telegram is a telegram without data.
The default identifier = 128 according to the Predefined Connection Set.
If a PC or PLC is used as a master, the identifier of the SYNC tele
g
rams can be
adapted by parameterization on the frequency inverter.
The identifier of the SYNC tele
g
ram must be set identically in all subscribers on the
system bus.
The setting of the identifier of the SYNC telegram is done via the parameter
SYNC-
Identifier
918.
Parameter Setting
No. Description Min. Max. Fact. sett.
918 SYNC-Identifier 0 2047 0
T
he settin
g
"0” results in identifier assi
g
nment accordin
g
to the Predefined Connection
Set.
Attention! The identifier range 129...191 may not be used as the emergency tele-
grams can be found there.
The temporal cycle for the SYNC is set on an frequency inverter defined as a system
bus master via the parameter
SYNC-Time 919.
Note:
A setting of 0 ms for the parameter
SYNC-Time 919 means "no SYNC
telegram”.