Setting Variable Constants To Use In Computation - YOKOGAWA GX20 User Manual

1.8 Configuring Math Channels (/MT option)
1.8.7

Setting Variable Constants to Use in Computation

Path
Description
1-106
Variable constants are constants that can be varied even when computation or recording is
in progress. They can be used for math and logic math.
You can vary variable constants on the setting screen or tuning screen (when the PID
control module is installed).
GX/GP: MENU key > Browse tab > Setting > Setting menu Math channel settings >
Variable constant
Web application: Config. tab > Math channel settings > Variable constant
Configurator: Math channel settings > Variable constant
Setup Item
Number of constant
Constant number
Select a range of constant numbers you want to set (in units of 10 numbers).
Constant
Setup Item
W001 to W100
W001 to W100
Set the constant. The number of significant digits of a constant is eight. When specifying a
constant using exponential notation, set the mantissa using up to 8 digits and the exponent
using up to 2 digits. The constants in the range specified by Constant number are displayed.
Note
When advance security is enabled, variable constants cannot be varied when recording is in
progress.
Selectable Range or Options
W001-W010/W011-W020/W021-W030/
W031-W040/W041-W050/W051-W060/
W061-W070/W071-W080/W081-W090/
W091-W100
Selectable Range or Options
–9.999999E+29 to 9.999999E+29
–9.9999999E+29 to –1.0000000E–30, 0,
1.0000000E–30 to 9.9999999E+29
Default Value
W001-W010
Default Value
0
IM 04L51B01-01EN