S3: Synchronous spindle
13.4 Points to note
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
731
Number of configurable spindles per channel
Every axis in the channel can be configured as a spindle. The number of axes per channel
depends on the control version.
Cross-channel setpoint coupling
● Cross-channel synchronous spindle couplings can be implemented with no additional
restrictions for DV, AV, and VV.
● Any number of following spindles, corresponding to the number of all spindles minus one
spindle for the master, in any channels on an NCU can be coupled to one leading
spindle.
Start synchronous mode using ASUB
When the PLC starts an ASUB, in the AUTOMATIC or MDA modes, synchronous operation
can be switched on and off – or terminated.
References:
Function Manual, Basic Functions, Mode Group, Channel, Program Operation, Reset
Behavior (K1)
Response to alarms
In the case of an alarm, which occurs during synchronous operation, and acts as alarm
response "withdraw control enable" and "activate follow-up mode" in the control, the ongoing
control behavior is the same as the behavior due to NC/PLC interface signals:
● DB31, ... DBX2.1 = 0 (controller enable)
● DB31, ... DBX1.4 = 1 (follow-up mode)
(See Section "Synchronous mode and NC/PLC interface si
gnals (Page 734)")
By resynchronizing via the NC/PLC interface signal:
DB31, ... DBX31.4 = 0 → 1 (resynchronization)
If the programmed offset is restored (see Section "Restore synchronism of following spindle
(Page 732)").
Block search when synchronous operation is active
Note
When synchronous operation is active for a block search, then it is recommended that only
block search type 5, "Block search via program test" (SERUPRO), is used.
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