Fst Examples; Example 1 - Writing Data To A History Point - Emerson Micro Motion 3711 Configuration And Use Manual

Function Sequence Tables
Table 11-13 Miscellaneous commands
Name Description
GO Go to specified LABEL
MSG Send message and value to
Model 3711 display. One 30–character
message can be sent by each FST as
shown next:
xxxxxxxxxxxxxxxxxx
xxxxxxxx
yyyyyyyy zzzzz.zz
In this sample:
• xxxx ...message
• yyyy ...FST Tag name
• zzzz ...ARGUMENT2 value
BRK Delay execution of each subsequent
command in the FST for the specified
number of 100-millisecond intervals.
The break value is reset to 0 at the next
execution of the FST.
END Complete FST execution, wait for
100 milliseconds, then return to first
command in FST.
ALM Write message and value to the alarm
log. Only the first 10 characters of the
30-character messages are used.
EVT Write message and value to the event
log. Only the first 10 characters of the
30-character message are used.
11.9

FST examples

This section provides four FST examples.
11.9.1 Example 1 – Writing data to a history point
In this example, two historical database points are defined to demonstrate using an FST to create a
"history log." In this log, data is written to history point 9 and a timestamp is written to history point
10 at five-minute intervals.
The following history configuration is assumed:
• History point 9 – Archive Type: FST Data
• History point 10 – Archive Type: FST Time – Minute
128
Arguments
• ARG1 = LABEL
• ARG1 = Message
• ARG2 = Database or Constant
Value
• ARG1 = Database or Constant
Value
None
• ARG1 = Message
• ARG2 = Database or Constant
Value
• ARG1 = Message
• ARG1 = Database or Constant
Value
Micro Motion
Results
Goto ARG1.
FST Message String(ARG1)
FST Message Value(ARG2)
FST break time = ARG1
Execute FST starting with first
command.
Log Alarm(ARG1, ARG2)
Log Event(ARG1,ARG2)
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Model 3711 Gas Flow Computers