CONTROL SOLUTIONS ValuPoint 4, Руководство пользователя

Страница: 42 / 95

object counts on the Device page.
Object Name – Enter an alphanumeric name for the object. This name must be unique
within the device.
Description – Enter an alphanumeric description for the object. This is informational
only.
Units – Select a BACnet units type from the list.
Read Periodic (check box) – Check this box if the BACnet object will be periodically
reading from the slave Modbus device or slave BACnet device. ‘Read’ is valid for Input
and Value type objects.
Write Periodic (check box) – Check this box if the BACnet object will be periodically
writing to the slave Modbus device or slave BACnet device. ‘Write’ is valid for Output
and Value type objects.
Write on Delta (check box) – Check this box if the BACnet object will be writing to the
slave device only when the object’s value changes by a specified ‘Delta’. It is valid to
check both Write Periodic and Write on Delta at the same time, or check just one or
the other. ‘Write’ is valid for Output and Value type objects.
Set Default on Power-Up (check box) – Check this box if the object should assume the
default value every time the ValuPoint powers up.
Set Default on Comm Fail (check box) – Check this box if the object should assume
the default value when communication with the slave device has failed some number
of times.
Enable Max Quiet Time (check box) – Check this box to enable maximum quiet time.
This is applicable to an object which is set to Write on Delta. The result is that if there
has been no change within the max quite time, the slave device will be re-written
anyway.
Object is Persistent (check box) – Checking this box means the Present Value of the
object will be retained through restart or power cycle, rather than reset to zero. This is
applicable to only certain objects. Analog Input objects mapped to physical inputs, for
example, will not honor the Persistent flag - an Analog Input will always reflect the
actual input value. Analog Outputs will also not honor the Persistent flag - if a specific
power-up value is desired, use the Default Value and check 'Set Default on Power-Up'.
Analog Value objects will always honor the Persistent flag. Binary and Multistate
objects follow similar rules.
Poll Rate (Sec) – This rate applies to periodic reading or writing, and simply specifies
how often the slave device is read from or written to. (This parameter does not apply
to physical I/O.)
Initial COV Increment – The initial COV increment specified here will apply when
8. Object Map Page file:///C:/AAA_CSI/Literature/2016 User Guides/VP4-BACnet User Gui...
2 of 10 11/3/2016 10:42 AM