Software/ Programming
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RTU PROGRAMMER VERSION 3.03 HELP
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If this input is selected as a Digital input, the value in this field will be a
threshold. Any value above this threshold will be a I and any value below this
threshold will be a zero. A message is created only when the input crosses from
one side of the threshold to the other. If the input type is analog, the value in this
field is a dead zone. The dead zone is minimum change necessary to initiate a
message.
Digital and analog inputs can be inverted. Inverting a digital value will cause an
open contact to be transmitted as closed contact and vice versa. Inverting an
analog input will cause a full scale reading to be transmitted as a zero. A zero
reading will translate to a full scale output at the receiver.
All input values are sent when a message is created. You can select which inputs
will trigger a message. If "no" is selected, changes on this input will not cause a
message to be sent. The status of this input will only be sent if an active input
changes or it is time for the unit to check-in. If "yes" is selected, changes on this
input will cause a message to be sent.
The time delay is the length of time a signal must change before it is processed
as a valid change. A momentary change with a duration less than the time delay
will be ignored.
2.2 Outputs:
The RTU has two digital outputs and two analog outputs. These two analog
outputs share their external connection with two of the inputs. They are
hardware selectable between inputs and analog outputs.
An eight character long name may be used to identify each of the outputs( i.e.:
TANKlLVL, PUMP2PWR). These tag names will be stored in the
configuration files when they are saved to disk, but will not be stored in the RTU
due to EEPROM space limitations.
A used output is controlled by another RTU's input. When this RTU receives a
message from the other RTU, it sets its corresponding output to the same value.
The from ID is the ID number of the R TU which has the input controlling this
output. The from location is the input number of the input which controls this
output. This input number corresponds to the input number in the top half of the
screen for the RTU listed in the from ID field.
Example 3:
RTU #1 has 1 digital input and 1 analog input which must be
transmitted to RTU #2. The digital input must be inverted. The threshold
between a high and a low value is half scale. The digital input is a noisy signal
and we do not want a momentary glitch to trigger a false alarm. However, we
want any state which persists for more than 5 seconds to be treated as a true
signal. The analog input is a O (zero) V to 5 V input. We do not want to receive a
status report 9nless the input changes by more than 0.5 V. Typical entries on the
input configuration of RTU # 1 would be:
( B-8)
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