Delta Controls eZFC-424R4-24, Инструкция по применению

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eZFC-424R4-24 Application Guide
Edition 2.6 Page 15 of 84
Data Exchange
This section describes how the enteliZONE controllers accept and initiate data exchanges in the
network.
The enteliZONE controller accepts these data exchange requests:
l
Poll. The default data exchange type set up in the Data Exchange Settings object (DES) is
Poll. The poll interval can be adjusted in the DES object, at a recommended minimum of 1
second per MS/TP device on a segment.
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Change of Value (Confirmed and Unconfirmed). The enteliZONE controller is limited to
a maximum of 12 subscriptions (Delta Exchange Local or DEL objects).
The controller does not support the Optimized Broadcast and Broadcast Data Exchange request
types. If a controller attempts to subscribe using any of these exchange types, the exchange types
will fail and revert to polling.
The programmable controllers can initiate up to 12 data exchange polling requests (Delta
Exchange Remote or DER objects). Other types of Data Exchange initiating request types are not
supported.
The DES object for the controller lists the number of DER and DEL requests that are in use.
The controller supports Bulk Data Exchange (BDE) but is limited to 2 BDE objects. Each BDE
object can hold up to 12 tag and object entries on the object’s Transmit Entries tab.
For more information about Data Exchange types, go to the George Support knowledge base
article KBA 1813 .
Alarming
The programmable controller supports up to 5 EV objects as well as intrinsic alarming on up to 5
input and output points (see below for more information about intrinsic alarming). These EV objects
support these alarm types:
Alarm
Type
Description
Change of
State
Used to monitor and alarm a binary value.
Command
Failure
Used when you have a binary value with feedback. An alarm is generated if
monitored values do not match the feedback value.
Floating
Limit
Used to alarm when an analog value varies more than a set limit from a variable
setpoint value.