YASKAWA JAPMC-IQ2303 Switch voltage module

The double CDP time-out is required when: • CDPs with corresponding DSPs must not go to invalid state due to a switch-over. • S800 I/O is used, and the S800 I/O Modules must not enter OSP state due to a switch-over. The double CDP time-out must be enabled when: • Redundant CI522s are defined. Defining both modules in the CI522 DB element enables double time out. • A CI522 receives data from a controller with redundant communication interfaces. The double time out is enabled when the EN_DTMO terminal on the CI522 DB element is set to 1. • FCIs subordinated an Advant Controller 450 use, automatically, the same CDP time out as the superior Advant Controller 450. • A CI869 receives DSPs from a redundant CI522. • Other stations receive DSPs from redundant CI869 with the cycletimes 1 ms, 2 ms, 4 ms, and 8 ms.If double CDP time out is not available for a station, the receiving cycle times can be doubled compared to the sending cycle times. This ensures that the CDP does not enter the time-out state.

Double CDP Time-out

 The double CDP time-out is 40 ms for the cycletimes 1 ms, 2 ms, and 4 ms. When using redundant CI522s, CI869s, and CI820s, the partner supervision mechanism needs four cycles of the fastest CDP cycle time used on the bus, to detect that the partner is no longer present. If the partner is the current primary, within the redundant pair, a switch-over is performed. The switch-over needs extra time, up to several cycles for fast CDPs. The receiving CDPs reaches time out state and are set to non valid in case of a switch-over. For switch-over handling without the CDPs momentarily being invalid at the switch-over, the CDP time-out for redundant CI522s, CI869s, and CI820s is set to double the value (that is, eight cycles instead of four).

Communication Interface Functions

 After power on (or restart), the communication interface can only become operational if it is set operational by the station. If the communication interface is not operational: • It does not provide any transmissions on the Advant Fieldbus 100. • It cannot share the bus master responsibilities, and it cannot participate in the configuration algorithms of the active scan table. Communication interfaces defined as bus administrators participate in the bus master responsibilities. As the bus administrators supervise the traffic on the bus and takes over the bus master function if the current master falls out, it is recommended to define communication interfaces as bus administrators, when ever possible.

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