Omega DR130 SERIES, User Manual

Page: 92 / 99

App-3
Computing Equation
App
Units in computing equations
In computations, measured data are handled as numbers without units. For example, if the
measured data of channel 001 is “20 mV” and the measured data of channel 002 is “20 V”, the
computed result of “001+002” becomes “40”.
Limitations in computing equations
Multiple operators can be used in 1 computing equation. But, there are following limitations.
-
Number of characters that can be used : 40 characters
- Total number of channel numbers and constants: 16 (Computation error occurs when 16
exceeded, and the computed result bOVER or -OVER)
- Computation channel numbers: Computation channel numbers less than the current computation
channel number can be used as variables within the computing equation.
Example: A02=001+A01
←
Computation channel numbers greater than or equal to A03 can not
be used in this computation.
- Statistical operators (TLOG. or CLOG.) can only be used once in 1 computing equation.
Control of the computing operation
There is a method to control using the data collection software and the method to control using the
event/action function described on the next page.
-
Control using the data collection software
This software allows for the start/stop of the computation, and the clearing of the computed result
(select between just clearing or immediately compute after clearing).
Computation start
Computation start
Computation stop
Computation clear & start
Computed data
- Control using the event/action function
Can start/stop computations or clear/reset computed results by an event occurring. This function
distinguishes clear and reset as shown below.
-
Clear
When issued during the computation, the measured data is reset before doing the first
computation.
Computation clear
Computed data
Computation start Measurement interval
- Reset
When issued during the computation, the measured data is reset after doing the first
computation.
Measurement interval
Computation start Computation
reset
Computed data
Alarm setting for the computation channel
Similar to the standard channels, up to 4 alarm values (levels) can be designated for each
computation channel (upper limit alarm / lower limit alarm).
App.1 Computing Equation