System Overview ProSafe-COM 3.00
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Events
Tag file
V-net
Modbus
Tag, Modbus filter, V-net filter
Tag1, N, N
Tag2, Y, N
......
Taglast Y, N
Figure 16: Tag file and event filtering
Logic program file
ProSafe-COM has the ability to execute a logic program, just like a PLC. It reads inputs, performs logic
(an application program) and writes outputs. The inputs can be virtually anything. For example the status
of tags in the ProSafe safety system, inputs from the matrix panel push buttons, the current status of any
output, arithmetic calculations, or the status of a local ProSafe-COM tag that is set externally via a DCS
command. The logic program can logically combine all these inputs and write the result to any output
(provided that the output tag is not defined as read-only type).
COM SET supports almost the entire set of logical and arithmetic operations that is common in modern
programming languages. The source program is written as an ASCII text file. The syntax strongly
resembles that of the modern programming languages.
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Copyright Yokogawa Europe Solutions B.V.
TI48J01A00-00E Oct 2010
