Emerson SI-DeviceNet User Manual page 37

Input consistency enable
S.01.026
Input consistency trigger parameter
S.01.027
Output consistency enable
S.01.028
Output consistency trigger parameter
S.01.029
The SI-DeviceNet module provides an input/output consistency feature which ensures
that the data in the input or output mappings is only transferred between the
SI-DeviceNet module and the master when the mapped parameters are ready. This
prevents data skew between parameters in the input/output mappings.
If Input consistency action (Pr S.01.026) and Output consistency action (Pr S.01.028)
are set to 0 (i.e. default settings), then the input/output consistency features are
disabled so that input and output data is always read from or written to the master/
module.
If Input Consistency Action (Pr S.01.026) is set to On (1), the SI-DeviceNet module will
check the value of the parameter specified by the Input Consistency Trigger Source
Parameter (Pr S.01.027). If the input trigger source parameter defined by Pr S.01.027 is
set to a non-zero value (for example by a user program in an applications module), this
indicates to the SI-DeviceNet module that all the mapped parameters are ready to be
read. The module will then read the mapped parameters, transfer them to the master
and will then clear the input trigger source parameter to zero. When the input trigger
source parameter is set to zero, the SI-DeviceNet module will continue to transfer the
previously read data to the master.
If Output Consistency Action (Pr S.01.028) is set to On (1), the SI-DeviceNet module will
check the value of the parameter specified by the Output Consistency Trigger Source
Parameter (Pr S.01.029). The output trigger source parameter defined by Pr S.01.029
will initially be set to 1.
SI-DeviceNet User Guide
Issue Number: 2
Default Off (0)
Range Off (0) or On (1)
Access RW
Default N/A
Range 0.00.000 to 4.99.999
Access RW
Default Off (0)
Range Off (0) or On (1)
Access RW
Default N/A
Range 0.00.000 to 4.99.999
Access RW
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