Automatic Block Partition |
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Starting with version 2.00, Modbus Driver now has a feature called Automatic Block Partition. With this feature, this Driver manages the division of blocks larger than protocol limits. Thus, users do not need to worry about exceeding the maximum limit for block size, because this Driver divides blocks in the correct sizes during communication with a device, if any Block Tag exceeds the maximum allowed size. Starting with version 2.01, this Driver also supports Superblock Readings. With this feature enabled, users do not need to group variables into Block Tags aiming to improve performance, it is possible to use only Tags without degrading performance. And as the Superblock algorithm already considers the maximum block size allowed by the protocol, when this feature is used this Driver also does not need to use Automatic Partition feature. In cases when, due to device's specificity (please check topic Superblock Reading), it is not possible to enable the EnableReadGrouping property in E3 or Elipse Power (a property that enables Superblocks), or if users are using the old Elipse SCADA, which does not support grouping (Superblocks), then they must use Automatic Block Partition to ignore protocol limits.
The article KB-23112 in Elipse Knowledgebase presents a summary of questions related to Tag grouping and Block resizing in Modbus Driver, discussed here and in other topics (please check topics Superblock Reading and Optimization Tips). |