eZV-440 Version 2.1 Application Guide
Page 10 of 67
Document Edition 2.5
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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 eZV-440 controller is limited to a
maximum of 12 subscriptions (Delta Exchange Local or DEL objects).
The eZV-440 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 eZVP-440 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 Description tab on the DES object for the eZV-440 controller lists the number of DER and
DEL requests that are in use.
The eZV-440 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 Delta Controls Technical Support
web site knowledge base article
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). The
eZV-440 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.
Out of Range
Used to alarm when an analog value varies outside of a set of fixed limits.
The enteliZONE family of controllers does not support Change of Value or Change of Bitstring
alarm types.