IC-Module for EtherNet/IP
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The IC-Module allow a separate validity period to be defined for each
producer (SDI, SSC, EtherNet/IP ). When a producer supplies new
process data, a stopwatch is started. If the producer does not supply
any new process data before the predefined validity period expires,
then the old data is invalid after this time.
Each consumer predefines which data he is to receive from the Data
Broker in such a case:
– All bytes at 0
– All bytes at 1
– retain the last valid data
The set validity periods from KUNBUS-IC are saved permanently in
the Memory registers. They are also available after a restart.
Likewise, the rule defined for a consumer, as to how to proceed if the
validity period is exceeded. The respective time values of the validity
period must be adapted, of course, to the cycle time of the interface
concerned.
– For EtherNet/IP this cycle time is determined by parameters of the
master.
– For SSC interface the time is determined from the shift register chain
length, the cycle frequency, and for short or fast register chains, it is
determined by the cycle time of the KUNBUS-IC.
– During SPI slave mode and SDI transfer, the master determines the
cycle time of the respective interface.
Components
