IC660TBD025 system spare parts card module

IC660TBD025 system spare parts card module

Technical data of product parameters

It is also possible to overload the CIs by using too fast a poll rate on the OPC server. The poll IC660TBD025
variables are divided into two groups: those that have SOE or Process Historian enabled
(Sequence of Events Update and Process Historian Update), and the Modbus data that does
not have SOE (Global Ungrouped Tag Update). The product description for the OPC Server
describes loading and timing calculations.
An Ethernet link should be designed to be less than 30 % loaded.For CIs before release 3.5, allow about 3 ms per Modbus / data packet for the OPC server if IC660TBD025
the CI is not running peer to peer. If the CI is running peer to peer, allow about 6 ms per OPC
packet. The non SOE Modbus data may have several packets, each update depending how
the Modbus variables are distributed. Sequential Modbus addresses are the most efficient.
The network statistics are available by typing ‘tcp ns’ on the CI diagnostic (see section 5). By
waiting 10 seconds and requesting another reading it is possible to work out how many
packets are passing over a 10 second period and hence the time per packet. The situation IC660TBD025
can be made worse if there are a lot of writes to the system, because they are individually
passed to the Processor and can take longerSEQ_NO is a read only register maintained by the SOE over Modbus service. Upon the start
of the service or after each acknowledged transfer, it is incremented when new event data
is available.
NUM_BLKS is a read only register maintained by the SOE over Modbus service. When the
SEQ_NO field is incremented, the NUM_BLKS field will be updated to indicate the number of
data blocks that are available.

Product picture display

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Introduction to main products

Focus on DCS, PLC, robot control system and large servo system.

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reminder

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