Emerson SI-EtherCAT User Manual page 89

S.00.039
Minimum
Default
Type
Display Format
Coding
The SI-EtherCAT module provides an input consistency feature for the synchronized cyclic data
which ensures that the data in the input mappings is only updated when the mapped parameters
are ready. This prevents data skew between parameters in the input mappings.
When the input consistency is enabled (S.00.038 = On), the input consistency trigger parameter
(S.00.039) is used to control the TxPDO data exchange, ensuring skew does not occur; a user
program, for example, must check the trigger parameter is 0 before writing to the mapped
parameters, and it should set the parameter to 1 after all the data has been written. The SI-
EtherCAT module will check that the trigger parameter is 1 before reading the TxPDO sources and
will set the trigger parameter to 0 after the TxPDO sources have been read.
S.00.040
Minimum
Default
Type
Display Format
Coding
S.00.041
Minimum
Default
Type
Display Format
Coding
The SI-EtherCAT module provides an output consistency feature for the non-synchronized cyclic
data which ensures that the data in the output mappings is only updated when the mapped
parameters are ready. This prevents data skew between parameters in the output mappings.
When the output consistency is enabled (S.00.040 = On), the output consistency trigger parameter
(S.00.041) is used to control the RxPDO data exchange, ensuring skew does not occur; a user
program, for example, must check the trigger parameter is 1 before reading the mapped
parameters, and it should clear the trigger parameter to 0 after all the mapped parameters have
been read. The SI-EtherCAT module will check that the trigger parameter is 0 before writing to the
RxPDO destinations and will set the trigger parameter to 1 after the RxPDO destinations have been
written.
SI-EtherCAT User Guide
Issue Number: 2
Sync IN Consistency Trigger Parameter
0 (Display: 0.00.000) Maximum
0 (Display: 0.00.000) Units
32 bit User Save Update Rate
SMP Decimal Places
RW, DE
Non-sync OUT Consistency Enable
0 (Display: Off) Maximum
0 (Display: Off) Units
1 bit User Save Update Rate
Bit Decimal Places
RW, Bit
Non-sync OUT Consistency Trigger Parameter
0 (Display: 0.00.000) Maximum
0 (Display: 0.00.000) Units
32 bit User Save Update Rate
SMP Decimal Places
RW, DE
1 (Display: 9.99.999)
None
EtherCAT state transition
0
1 (Display: On)
None
EtherCAT state transition
0
1 (Display: 9.99.999)
None
EtherCAT state transition
0
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