Control 1 - 4 Menus (For On/Off Controllers) - Walchem WDP420 Instruction Manual

5.4 Control 1 - 4 Menus
The description of the menus for relay outputs will apply to Control 1 2, 3, and 4 for WPH410 and
WDP410 models, and to control 3 and 4 for WPH420 and WDP420 models.
The Control 1 - 4 menus are separate from each other but operate in exactly the same way. Each menu
provides the following independent settings: Set Point, Dead Band, Time Limit, Interlock, Output
Mode, Assign Input, HOA, Set Point, Dead Band, and Time Limit. The Control menu will be indicated
on the display by one of the following: (The 'A' indicates that the output is being controlled
automatically.)
NOTE: When programming the unit for the first time, go to the "Mode" menu to select how that
output will operate. Making this assignment first will bring up the correct menus for the Mode you
are using.
Ctrl 1 A
Ctrl 1 A
Ctrl 1 A
Ctrl 1 A TIMEOUT
Mode
(FOR ON/OFF CONTROLLERS)
Indicates that the output is currently OFF.
OFF
10:00 Indicates the length of time that the output has been ON.
Indicates that control has been suspended because the Interlock switch is Open
Intrlck
Indicates that the output has been on longer than the Time Limit.
Press the ENTER key to change the mode in which the output will operate. The relays may be a low set point, a
high set point, a low alarm, a high alarm, an out-of-range alarm, an in-range output, a probe wash or a high or
low set point time proportional output. Use the arrow keys to scroll through the choices.
Low Set Point
Press ENTER when this is displayed to select a low set point. The relay will close when the process value goes
below the set point value. The summary screen will display that the output is on. A time limit menu will be
available, to prevent runaway control. An Interlock menu will be available to allow you to stop control.
High Set Point
Press ENTER when this is displayed to select a high set point. The relay will close when the process value goes
above the set point value. The summary screen will display that the output is on. A time limit menu will be
available, to prevent runaway control. An Interlock menu will be available to allow you to stop control.
Low Alarm
Press ENTER when this is displayed to select a low alarm. The relay will close when the process value goes
below the set point value. The summary screen will display "Low Alarm". A time limit menu will be available,
to prevent runaway control. An Interlock menu will be available to allow you to stop control.
High Alarm
Press ENTER when this is displayed to select a high alarm. The relay will close when the process value goes
above the set point value. The summary screen will display "High Alarm". A time limit menu will be available,
to prevent runaway control. An Interlock menu will be available to allow you to stop control.
Out Range Alarm
Press ENTER when this is displayed to select an out-of-range alarm. The relay will close when the process
value is either above or below the two set point values. The summary screen will display "Range Alarm". A
time limit menu will be available, to prevent runaway control. An Interlock menu will be available to allow you
to stop control.
In Range Output
Press ENTER when this is displayed to select an in-range output. The relay will close when the process value is
between the two set point values. The summary screen will display "In Range Output". A time limit menu will
be available, to prevent runaway control. An Interlock menu will be available to allow you to stop control.
Probe Wash
Press ENTER when this is displayed if you want to use the relay to interrupt control and activate a pump or
valve to wash down the electrode. The summary screen will display "Probe Wash". A time limit menu will be
available, to prevent runaway control. An Interlock menu will be available to allow you to stop control.
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