Instructions

UM-0085-B09 DT80 Range User Manual Page 55
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 Example
The schedule
RDX 1..3TK
samples analog channels 1 to 3 as type K thermocouples (
1..3TK) whenever the DT80 receives an XD poll command
(that is, whenever it receives the character sequence
XD) either from a connected computer, or by means of an alarm
action from within the DT80.
 Using Poll Commands with Standard Report Schedules
Figure 12: Polling a time interval schedule
A report schedule defined with a time or event trigger can also be polled by its appropriate poll command at any time. For
example, the report schedule
RC5M 1V 2V 3V
normally runs every 5 minutes (5M), but it can also be run at any time by an
XC poll command (from the host computer
or an alarm).
For schedules that have a long interval, this is useful for checking that a sensor is functioning.
Continuous Trigger
Figure 13: Continuous schedule
Report schedules that run continuously can be created. A continuous schedule will start scanning as soon as job is
loaded onto the DT80, and run until it is stopped (by sending a halt command or resetting the DT80, for example).
Define a continuous schedule simply by omitting the trigger from a report schedule.
 Example — Continuous Schedule
Sending
RA 1TK 2R(3W) 3TT
causes the DT80 to scan the specified channels continuously.
Note: The X schedule does not support continuous trigger. The schedule definition RX is equivalent to RXX, i.e. it defines a polled
schedule, not a continuous schedule.
Trigger While
Figure 14: Schedule "while" condition
A report schedule’s trigger can be enabled or disabled by an external condition. This is called the While condition — that
is, trigger only while
the external or internal condition is true.
The While condition can be either
• states on one or more of the DT80’s digital input channels (n
DS), or
• internal conditions specified to the DT80 as states of channel variables: