Siemens SINUMERIK 880 SW 6 Planning Manual page 249

05.91
SYNCHRONIZATION START
0/1 transition: Synchronization between the following axis and the leading axis specified in
the setting data is initiated at any time with the 0/1 transition.
1/0 transition: The PLC user program must reset the signal once synchronization is reached
(SYNCHRONIZATION REACHED = 1).
Preconditions for synchronization:
• The gearbox link must be switched on (LINK ON = 1).
• Synchronization must be enabled (SYNCHRONIZATION ENABLED = 1).
• When synchronization is started, the read-in enable should be cancelled until
synchronization has been reached.
• A free NC channel is needed for the synchronization and the following and leading axes
must have the same position control cycle time. The setpoint overlay for the following axis
must be switched on.
• When synchronization is started the following axis must not execute a further super-
imposed movement, otherwise the NC will abort it with "Delete distance to go". Since
"Delete distance to go" has a channel-specific effect, all the interpolator-controlled axes
associated with the following axis are affected.
FA OVERLAY OFF
0/1 transition: The setpoint overlay for the following axis is switched off. The NC acknow-
ledges this with FA OVERLAY ACTIVE = 0. The FA OVERLAY ON setting
data bit is also reset. The movement of the following axis is subsequently
determined exclusively by the movements of its leading axes, taking the speed
ratios into account (exception: see notes).
1/0 transition: The PLC user program must reset the signal if FA OVERLAY ACTIVE has
changed to the 0 signal.
Notes:
• The movements of the following axis can still be influenced by the handwheel with setpoint
overlay switched off. This can be prevented by the standard interlocks.
• With setpoint overlay switched off, the "Semi-automatic centering" and "On-the-fly
synchronization" functions cannot be performed.
FA 1: m=0
©
Siemens AG 1991 All Rights Reserved
SINUMERIK 880 (PJ)
FA 2: m=4
6ZB5 410-0HE02
7 ELG-Specific Signals (DB 29)
7.3 Signals to ELG (DB 29)
DW m + 2, bit 5
DW m + 2, bit 2
FA 3: m=8
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