Ritron DATAFLOW RTU Series Guía de usuario descargar pdf (Pagina 33)

Software/Programming

>>> RTU PROGRAMMER VERSION 3.03 HELP FILE <<<(continued)

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 1 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 a closed 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.: TANK1LVL,

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 RTU 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 0 (zero) V to 5 V input. We do not want to receive a

status report unless the input changes by more than 0.5 V. Typical entries on the input

configuration of RTU # 1 would be:

( B-8 )

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 62 63

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Ritron DATAFLOW RTU Series Guía de usuario Pagina 33