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AVEVA™ Communication Drivers

PID Section Items

  • Last UpdatedAug 29, 2024
  • 1 minute read

PDn:e[.f][/b]

n represents the file number. If not specified, it is assumed to be 0 (zero). If specified, the file number must be 0 - 255 decimal.

e specifies the element number within the PID file. It must be 0 - 255 decimal.

.f identifies one of the valid PID fields. The valid fields for PID files are listed in the table.

b is optional and is normally not used. Specifying the .f fields can access all of the fields of a PID. If specified, it indicates the bit (0 - 15 decimal).

Important: Access to PID files may degrade the Communication Driver's performance, due to the extreme size of the PID element (23 words each). If accessing only a few PIDs at one time, performance will not be affected greatly. However, if accessing a few fields of many PIDs at once, it may be faster to move the needed fields to an intermediate file (Floating Point or Binary) and let the Communication Driver access the intermediate files.

Examples:

PD:0.SP

PD9:3.LUT

PD1:0.CVP

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