The maximum allowable field wiring resistance between the transmitter and the IOTA connection terminal is dependent upon the voltage requirement of the transmitter. The formula for calculating the maximum wiring resistance for the Series C UIO channel used as an analog input is given by the following equation.
Introduction
There is a SP RAMP set up group for each control loop. Use the prompts to select the settings for each
loop’s program.
SP RAMP Prompts
Table 6-3 lists all the function prompts for SP RAMP configuration in the order of their appearance. These
prompts are available when SP PROG is enabled in the S PRAMP set up group described in Section 4.
All parameters may be changed while the program is disabled or in HOLD.
Table 6-3 SP RAMP prompts and available selections
Lower Display
Prompt
Upper Display
Range of Setting or Selection
Parameter Definition
SPPROG
DISABL
ENABLE
SETPOINT PROGRAMMING—This must be set to
ENABLE for the setpoint program feature to work, and
for the associated operating parameters to be displayed.
SP RAMP and SP RATE must be disabled. (See
Section 4.)
DISABL—Disables Setpoint Programming
ENABLE—Enables Setpoint Programming
RECYCLES 0 to 99 RECYCLES—Enter the number of times the program
selected for execution will be repeated.
SOAKDEV –99.9 to 99.9 engineering units SOAK DEVIATION—Enter the acceptable deviation
from setpoint during a soak cycle. If the PV differs from
the setpoint by more than the value of SOAKDEV, soak
time is frozen.
There are no guaranteed soaks if SOAKDEV = 0.
PROFILE 1 to 6 PROFILE used by Setpoint Program. This can also be
set or changed when viewed in the lower display and the
current profile is in the HOLD state.
STATE DISABLE
HOLD
Determines the state of the program after it completes
the final program segment cycles. If you select DISABL,
you must enable the program through the function
prompt before you can run the program again. If you
select HOLD, you can run the program again by
pressing the RUN/HOLD key.
RECOVERY ENABLE
DISABL
This mode, when enabled, will allow the SP Program to
continue from the point at which the power was removed
when there is a power interruption.
PROG END ENABLE
DISABL
Determines the status of the control output after the
program is run. If you select LASTSP, the recorder
controls to the last setpoint value which becomes the
LSP. For FSAFE selection, the recorder is switched to
manual mode and to the selected failsafe output value.
