CELTROL PANEL LAYOUT
There are two displays. The top, or voltage, display gives the actual cell voltage reading displayed continuously, updated each second. The voltage display flashes when the cell is in an unstable condition. The lower, or data, display is a four-digit display; and any of sixteen (16) selectable values can be displayed by the use of the rotary switch to the right of this display.
Several selector switches can be incorporated on a CELTROL controller depending on the cell technology and the customer's desires. Following is a description of all the switches:
A 16-position rotary switch that allows the user to select the items displayed on the lower four-digit display.
Up to four (4) four-position, feed-select rotary switches can be incorporated, which will allow modification of the basic feed control parameters without altering the base feed rate.
A rotary switch to allow selection of incremental voltage to add or subtract from the voltage set point.
A two-position Automatic Voltage Control (AVC) switch (toggle) that when "On" allows the CELTROL controller to control cell voltage to a target voltage. When "Off", voltage control is suppressed; however, feed and anode effect termination (AET) still function.
The two-position Auto/Manual switch (toggle) is normally on "Auto" for full automatic programmed control. When on "Manual" the cell is in complete manual control, including feed. Data is still collected, stored, and monitored, but no control will occur.
At times, the CELTROL Pot Controller (P.C.) determines that the cell requires operator intervention to correct a problem on the cell such as after an anode effect termination failure. After the operator corrects the situation, pushing the "Acknowledge" button on the front door panel returns the cell to automatic control.
There are twelve (12) LED lights on the front door panel. Typical functions of these lights are described briefly below: The Anode Effect (AE) light comes on when there is an anode effect on the cell.
The Automatic Voltage Control (AVC) light is on steady when AVC routine is active. It flashes when the cell voltage falls below 1.6 volts or if line current is not available from the Communication Buffer (C.B.)
An Anode Set Volt light indicates that the cell is in anode set routine, with temporary voltage added to cell. This added voltage will decrease by a preset amount per feed cycle until target cell voltage is returned to base target. The light will then go off.
The Tapping light is on to indicate successful activation of the tap routine. This routine is initialized through the Supervisory Computer (S.C.) and started by moving the tap switch to the "On" position.
The Starve light is on when the Starve routine is in progress. It is turned off when an anode effect occurs or if the Starve routine is terminated.
The Noise Control light comes on when the Noise Control routine is in progress. If this condition persists, a "noisy too long" condition is established and the Noise Control light will begin to flash.
The Feed lights relating to feed location are turned on or off alternately and indicate which location on the cell was fed last.
The Search Feed light is turned on when an anode effect search is in progress. It is turned off when Search Feed occurs or if an anode effect occurs.
The S.C. Down light comes on briefly while the P.C. is successfully communicating with the S.C. Unsuccessful communication with the S.C. causes the light to begin flashing on and off at the rate of once per second.
Variations to the above CELTROL panel switches, buttons, and indication lights are available depending on the control requirements of each plant.