Contemporary-control-systems BASremote User Manual (firmware 3.1.x) Manual do Utilizador descarregar pdf (Página 44)

TD040300-0MF

6.3.7 Pulse Input Configuring

You can define any channel 1–6 as type “INPUT: Pulse” as shown in Figure 30 which uses

Channel 1 as an example. Such a channel can accept a pulse train in the range of 0–40 Hz.

The channel BACnet type will be Analog Value.

NOTE: The value reported by this channel via BACnet will be a 32-bit float as this is an Analog

Value. To provide accurate values when counting input pulses, this value will rollover at 2

–1.

To reset the pulse input value, you can (via BACnet) take the channel out of service and write a

desired value — such as 0 — and then put the channel back in service to allow pulse counting

to continue. This value can also be reset by writing a new value to it using one of the following

four methods:

 via the map web page — displayed by clicking the Map button (Figure 15)

 via Modbus/TCP

 via Web Services

 via a custom webpage (which can write to the instance associated with this channel)

On the screen of Figure 30, you can adjust any of the following parameters.

Channel Name You can rename the channel using no more than 63 characters.

This will be the object name for this channel (followed by the

channel number). For example, “Pulse Input-1”.

BACnet Unit Group The Others default can be set to any option in the list.

BACnet Unit Value Set the NO_UNITS default to any option in the list. The available

options depend on the BACnet Unit Group you specify.

BACnet COV Increment Once the channel value changes by this amount (up or down), a

COV message is sent to subscribers.

BACnet Description You can enter any string using no more than 63 characters.

ACTUAL HIGH This specifies the highest value within the range.

ACTUAL LOW This specifies the lowest value within the range.

SCALED HIGH You can set a physical value corresponding to the high value.

SCALED LOW You can set a physical value corresponding to the low value.

Period If the “Rate” option has been selected, this specifies the period in

seconds — otherwise, this field is not present on the screen.

Rate This specifies that the rate of the input is being obtained.

Accumulate This specifies that the input pulses are being accumulated (absolute

count) — with no limit to the time during which pulses are counted.

High Level (V) You can specify a value from 10 down to (but more than) the “Low Level”.

Low Level (V) You can specify a value from 0 up to (but less than) the “High Level”.

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Contemporary-control-systems BASremote User Manual (firmware 3.1.x) Manual do Utilizador Página 44