Emerson Tescom ER5000 Series, User Manual, Page: 229 / 248

ER5000 —
229
Internal Variables
ER5000 Analog Input Variables
NOTE NOTE
CAUTION CAUTION
WARNING WARNING
For the following variables:
• variable #1 (ID_AD_SETPOINT)
• variable #5 (ID_COMPENSATED_EXTERNAL_SENSOR)
• variable #77 (ID_COMPENSATED_EXTRA_AD1)
• variable #78 (ID_COMPENSATED_EXTRA_AD2)
These variables are 16-bit when the controller is in ER5000 mode
(Jumper J9 = OFF, variable #120 (ID_MODE_ER3000_ER5000) => 0).
When the controller is in ER5000 mode, a value of 6400 counts is 0% and
59200 counts is 100%. To convert between counts and percent, use the
following formulas:
• value_percent = (value_counts16 - 6,400) * 100 / 52,800
• value_counts16 = (value_percent * 52,800 / 100) + 6,400
These variables are 12-bit when the controller is in ER3000 mode
(Jumper J9 = ON, variable #120 (ID_MODE_ER3000_ER5000) => 1).
When the controller is in 12-bit ER3000 mode, a value of 400 counts
is 0% and 3700 counts is 100%. To convert between counts and
percent, use the following formulas:
• value_percent = (value_counts - 400) * 100 / 3,300
• value_counts = ( value_percent * 3300 /100) + 400
01 ID_AD_SETPOINT
This is the value of the analog setpoint. A value of 6400
is 0% and 59200 is 100%. Note that the analog setpoint is
not used unless the controller is programmed to use it by
variable #43 (ID_SETPOINT_FLAG). When the controller is
in ER5000 mode, this variable records data in 16-bit mode,
which gives more accurate data acquisition than variable #37
(ID_SETPOINT).
05 ID_COMPENSATED_EXTERNAL_SENSOR
This is the compensated external sensor value, after
linearization, zero and span have been applied to the raw
signal. A value of 6400 is 0% and 59200 is 100%. When the
controller is in ER5000 mode, this variable records data in 16-bit
mode, which gives more accurate data acquisition than variable
#44 (ID_FEEDBACK).
77 ID_COMPENSATED_EXTRA_AD1
This input is available only on “F” models. This is the
compensated external analog input value, after linearization
has been applied to the raw signal. A value of 6400 is 0% and
59200 is 100%.