When you define a point, the following fields on the Device tab in the Point Properties dialog box, the point has values that are unique to or have special meanings for SNP and SNPX device communications:
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Access |
A point may be configured for READ or WRITE access. |
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Update Criteria |
The update criteria determine how the data will be requested. |
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Enter On Change or On Scan for points whose values should be polled by the SNP or SNPX communications enabler at regular intervals. Enter On Demand On Change or On Demand On Scan for points whose values should be polled by the SNP or SNPX communications enabler at regular intervals while users are viewing them. Enter Poll Once for points that are to be polled once when the SNP or SNPX communications enabler starts. |
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Address |
Point address requirements are device-dependent. For SNP and SNPX device communications, the address format is <memory_type><offset> The memory types you can use are listed in the Supported SNP and SNPX Memory Types section |
When you are configuring Boolean points, you must also enter data in the following fields:
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Address Offset |
Enter the bit offset that corresponds to the bit position within the word. |
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CIMPLICITY configuration for SNP and SNPX. |
