VersaPro Temperature Controller
Page 32
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10
Digital Input Event
The VersaPro has a single digital input. This input is activated by making an isolated contact closure between
terminals TB-B 11 and 12. This input is debounced for a momentary closure of at least 0.6 seconds.
NOTE
Do not connect either terminals TB-B 11 or 12 to any AC or DC potentials.
These terminals are internally connected to an isolated 5VDC source. Use
only an isolated contact closure across these terminals.
The input event can be set to any one of the following functions: OFF, PrOb (start probe test), AUTO (set to
auto), rEn (set to remote), ACK (alarm acknowledge), PrOC (process hold), Strt (timer start), HOLd (timer
hold), End (timer end acknowledge). These settings can be selected in the Input Setup menu at the DIG
EVENT parameter. The selections can be made by pressing the up or down arrow keys and then pressing the
Enter key.
OFF
This selection disables the input event function. This is the default condition of this feature unless another
function is selected.
PROB
This selection will start the impedance (10Kohm) test and/or probe burnoff. The various probe tests will run
only if they are selected in the Probe Menu. The PrOB input event will have no effect if no probe tests are
selected.
If a probe test interval time is set to any value other than zero, activating this function will reset the interval
count down timer. If the probe test interval time is set to zero this function will operate only when the
contact closure is made across the event input terminals. The contact closure must open and close each
time to initiate another probe test.
AUTO
(controller only)
This selection will force the instrument from manual mode or remote mode into local automatic mode. No
change will occur if the instrument is already in automatic mode.
rEn
(controller only)
This selection will force the instrument from local setpoint mode or manual mode into remote setpoint mode.
No change will occur if the instrument is already in remote setpoint mode.
ACK
This selection will acknowledge any latched active alarm except the timer end alarm. This function will have
no effect if the alarm condition persists when the acknowledge signal is issued. This function resets a
latched alarm similar to pressing the Enter key.
PrOC
(controller only)
This selection will place the process calculation in hold. The control output is also held at the
output level when the process hold event was set. This includes all analog output signals as well
as control contacts. This is similar to the state the instrument is set to when the probe tests are
running.