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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-
ram of an frequency inverter defined as the system bus master is ad
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
rams can be
adapted by parameterization on the frequency inverter.
The identifier of the SYNC tele
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
he settin
"0” results in identifier assi
nment accordin
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”.
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