VersaPro Temperature Controller
Page 34
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11
Timer Function
The Versapro timer function is available on all process controller options. The timer can operate independently
or it can be dependent on the process based on how either alarm contact is configured. The instrument has
three possible functions; timer, guaranteed start timer, and guaranteed soak timer. These functions are set
through the mode selection of alarm 1 or alarm 2 in the Setup menu. Only one alarm should be set to a timer
function at any time.
The timer will only work if three conditions are met; the timer function must be enabled in the Setup Control Menu,
an alarm contact must be configured for a timer function, and the timer setpoint must be greater then zero.
The timer setpoint is set in the Setpt Key menu. The remaining time is displayed in the display cycle list and can
be edited when the timer is running. The timer setpoint is entered in whole minutes. The remaining time will show
the tenths of a minute if the timer is less than 1000 and shown as whole minutes. The timer start setting follows the
remaining time display in the Setpt Menu.
11.1 Setting the Timer
The first step for using the timer is to enable the timer function in Setup Control Menu. This allows the timer to
be started in various ways and also allocates a serial port channel for the timer.
The next step is to move to the Alarm menu and select a timer function for one of the alarms. The alarm that is
selected will close its alarm contact with the timer counts to zero. Only one alarm should be selected for a
timer function and any time.
NOTE
Do not set both alarms to timer functions at the same time.
The final step is to press the Setpt key and the Enter key until the TIMER SETPT parameter appears. Enter
the desired value of the timer. This value is the only setpoint for the timer. This value will be used as the timer
setpoint if the instrument is in the local automatic or remote control mode. There is no separate remote timer
setpoint value. The local timer setpoint value will be over written by the value received from a remote device
like a computer or master instrument.
The final step is to start the timer. This can be done in the Setpt menu by pressing the Enter key until the
TIMER START parameter appears and selecting ‘YES’. The timer can also be started by pressing a dual key
sequence LEFT arrow and Enter, through the serial interface, or through the digital event input.
Timer Dual Key Functions
+ Enter
In Auto or Remote mode this two key combination will activate or deactivate the timer
function.
+ Enter
This two key combination allows the timer function remaining time to be edited.
The behavior of the timer is controlled through the selection of the alarm modes. If no timer alarm is selected
for either alarm 1 or alarm 2 then the timer will not start. The Time, Start, or Soak alarm modes must be
selected for one alarm contact before the timer will start.
