Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
299
of 820
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156.2 Status
Status of synchronization
156.3 Sync tolerance
Tolerance range for the synchronization signal. These values set the maximum permitted
jitter for the synchronization signal. It also sets the range within the drive synchronously
to the fieldbus.
156.4 Sync offset
Offset between the fieldbus synchronization signal and the controller cycle. Positive val-
ues generate an offset of the controller cycle.
This parameter is set automatically. Manual setting is possible, if manual setting is acti-
vated in the parameter „Synchronization Mode“ (Z156.1–).
According to fieldbus cycle time and configuration of the EtherCAT master, a manual set-
ting may be necessary, in order to exchange data between the drive controller and the
fieldbus connection without problems.
The Sync Offset must be set, so that no access conflicts occur on the internal DPRAM.
This can be controlled via the parameters
Z156.15– to Z156.19–. Write access fieldbus
and read access DSP must be at least 50 µs apart. The same applies to write access
DSP and read access fieldbus.
156.5 Fieldbus cycle
Measured interval-length of the synchronization signal.
156.6 Fieldbus jitter
Measured jitter of the fieldbus synchronization signal (deviation of the set interval-length).
156.7 Sync error
Current phase error between synchronization signal and the controller cycle.
Bit-No. Meaning
0 0: Not synchronous
1: Synchronous
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