Yokogawa Value Series FX1000 - Manual (Page 51)

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IM 04L21B01-01EN
• Data That Can Be Used in Equations
The data listed below can be used.
Data Notation Description
Measurement channel data 001, etc. Specify the computed data using a channel number.
Computation Channel data 1 101, etc. Specify the computed data using a channel number.
Constant K01 to K60 A value.
Communication input data C01 to C24 Data set through communications.
Status of the remote control
input 1
D01 to D08 2 The value is 1 when the remote control input is ON
or 0 when it is OFF.
Pulse input 1 P01 to P08 2
Q01 to Q08 2
Counts the number of pulses per scan interval.
Counts the number of pulses per second.
Internal switch status S01 to S30 1 or 0.
Alarm output relay status 1 I01 to I06 and
I11 to I16
The value is 1 when activated or 0 when
deactivated.
Flag 1 F01 to F08 Use the event action function to set the flag (for
details, see section 1.6).
Power data 1 WAT, etc. For details, see section 3.12.
1 An option.
2 Values such as 01 are terminal numbers.
Only the data that are checked in the table below can be used in TLOG, CLOG, and
PRE.
Data
Comp
Meas.
Channel
Comp.
Channel
Constant Comm.
Input
Remote Pulse Internal
Switch
Relay Flag Power
TLOG       
CLOG  
PRE      
Other
computations
         
Example: TLOG.SUM(S01), CLOG.AVE(001.002.K01), and PRE(S01) are not allowed.
• Processing Order of Computation
Computation functions are performed every scan interval, starting with the smallest
computation channel number.
Example: If you specify 102 = 101 + 103, the value of the previous scan interval is
used for the 103 value.
• Handing of the Unit in Computations
In computations, measured values are handled as values without units. For example,
if the measured data from channel 001 is 20 mV and the measured data from channel
002 is 20 V, the computed result of 001 + 002 is 40.
• Displaying the Computed Data
The computed data is displayed by setting a measurement span for each computation
channel. Computation channels can be displayed on various operation screens in the
same fashion as the measurement channels.
For the setting procedure, see section 9.3.
• Alarm
Up to 4 alarms can be assigned to each computation channel. The alarm types are
high limit alarm (H), low limit alarm (L), delay high limit alarm (T), and delay low limit
alarm (t).
• Saving Computed Data
As with the measured data, the computed data can be saved to display data, event
data, manual sampled data, and report data.
1.8 Computation and Report Functions (/M1, /PM1, and /PWR1 options)