MIC 1400 Manual
Edition 1
22
To adjust the Setpoint, press the UP or DOWN key as applicable.
Momentary depression will increment or decrement (as appropriate) the
setpoint by one unit in the least significant digit. If the key is held for longer
than 1 second, the least significant digit will change at the rate of 25 units
per second. If the key is held for longer than 10 seconds, the second least
significant digit will change at the rate of 25 units per second. If the key is
held for more than 10 seconds, the third least significant digit will change at
the rate of 25 units per second.
3.1.5.2 RAMPING SETPOINT
A selectable Ramp Rate function in the range of 1 to 9999 units per hour
can be used to limit the rate at which the setpoint used by the control algo-
rithm will change. This feature will also establish a soft start up. Upon
power up, the instrument will take the initial process value as the setpoint.
A setpoint ramp rate will be calculated to increase the setpoint from the
initial process value to the setpoint selected. The setpoint ramp feature
disables the Pre-Tune facility. The Auto-Tune facility, if selected, will com-
mence only after the setpoint has completed the ramp.
Sudden changes in the setpoint value entered via the keypad can be inhib-
ited from effecting the control outputs by use of this feature. The internal
setpoint used to control the process will ramp to the setpoint value entered
at the rate of change selected.
To view the Ramping Setpoint value while in the Control mode and "ESPr"
in the Tune mode is disabled, press the SCROLL key until "SPrP" is dis-
played in the lower display. This is the code for the ramping setpoint value.
Press the SCROLL key one more time and the lower display shows "SPrP"
and the upper display will show the current ramping setpoint.
SPRr not OFF and ESPr equal to 0
PV
BLANK
Ramping SP
PV
*SP
SPrP
SPrP
*SP
If ESPr is enabled, the display sequence changes to:
PV
BLANK
Ramping SP
BLANK
*Ramp Rate
PV
*SP
SPrP
SPrP
SPrr
SPrr
*SP
*Adjustable
