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4.1.2.9 PROPORTIONAL OUTPUT PERCENTAGE DISPLAY
While in the Control mode, press and hold the UP key and then press the SCROLL key to
cause the display to sequence through a series of display codes and values:
Po1
Percent Output 1 (if applicable)
Output 1% value
Po2
Percent Output 2 (if applicable)
Output 2% value
Proc
Process Value
Actual Process Value
Each code and output value will be displayed only if the corresponding proportional output is
present. Each code or value will be displayed for 1 second. This sequence of displays will
continue until the SCROLL key is pressed, which will then return the display to the normal
mode.
4.1.3 MANUAL MODE FOR PROPORTIONAL OUTPUTS
Manual adjustments of the proportional output(s) can be used to test the operation of the
output(s), while tuning to establish basic process control, or to provide control of the
proportional output(s) during the occurance of certain error conditions.
Note: The proportional output(s) do not change automatically in response to changes
in the process while in the Manual mode. Be sure to pay close attention to the process
to avoid damage.
To enter the Manual mode, press and release the SCROLL key until you see Stby. Then
press the DOWN key . The Manual mode status LED will light to indicate that the Manual
mode is in use. Shifting from the Control to the Manual mode is bumpless. The proportional
output(s) will stay at the last value(s) calculated by the control algorithm. Po1 will appear on
the display if output 1 is a proportional output or Po2 if output 1 is not a proportional control. If
no keys are pressed, the display will sequence through the following displays:
Po1 if output 1 is 3, 4, 5, 6, 7 then the output 1 percentage of output value
Po2 if output 2 is 3, 4, 5, 6 then the output 2 percentage of output value.
Proc will be displayed, then the current process value.
In order to vary a proportional output percentage value, press and release the SCROLL key
until the display code for the output is displayed Po1 or Po2. Press and release the SCROLL
key again to see the percentage of output value. Press the UP key to increase the output
percentage value. Press the DOWN key to decrease the output percentage value.
To return to the Control mode of operation from the Manual mode, press the SCROLL key
until you see Po1 or Po2 then press the UP key. The display will change to Stby. Press the
SCROLL key until you see the mode you wish to enter, then press the DOWN key. If the
Automatic Transfer feature is selected in the Program mode, the instrument will switch from
Manual mode to the Control mode when process value reaches the setpoint value.
4.1.4 PROCESS RE-TRANSMISSION OUTPUT - EO OPTION ONLY
If the instrument is provided with a current output not used for process control, this output
may be assigned to provide a linear re-transmission of the process value. This output can be
used to provide a process signal to remotely installed recorders, panel meters, or dataloggers.
The process output is scaled for the application by using the Program mode parameters
process/setpoint value upper Pou and process/setpoint value lower PoL. The current output
resolution is @ 200 steps, so for the best re-transmission accuracy, the span between Pou
and PoL should be as small as possible. If a current output is used for re-transmisssion, the
corresponding control output, out1 or out2, cannot be assigned to it.
Upon an error condition, Process Value output will be set to 0 percent if the 1st output control
is direct acting. If the control action is reverse acting, the Process Value output will be set to
100 percent.
Содержание MIC 6000
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