Specifying A Time Server; C300 Controller Device Index - Honeywell Experion C300 User Manual

Specifying a Time Server

The C300 Controller requires a reference source for time in order to power up and
normally operate, but limited controller operation can be achieved in cases where system
time is not available. Although the controller can use a number of time sources of
varying quality, the preferred time source is a Simple Network Time Protocol (SNTP)
operating on another node in the Experion system. The controller queries the time source
at one minute intervals to keep its clock synchronized. Connection to the time source is
made at controller start up. See
information.
The time source is given an IP address so that controllers and other nodes can access
time. See the Setting system preferences in the Control Building User's Guide for more
information about setting IP addresses.

C300 Controller Device Index

The Device Index, in conjunction with the Base IP Address (entered in the System
Preferences dialog of Control Builder), gives the controller a unique IP address on the
FTE network where the controller resides. The Device Index is manually set by using
the three rotary switches located on the controller IOTA. The Device Index is also
entered on the controller block configuration form (DEVICEIDX parameter).
Upon power up of the controller, the Device Index is provided to the bootP server on the
associated FTE community. The bootP server issues an IP address for the controller,
based on the Device Index of the controller and the Base IP Address configured for the
FTE community. The controller's IP address identifies the controller as an FTE node on
the network
Device Index rules
Redundant controller pairs are assigned Device Indexes based on their redundancy roles:
The primary controller is assigned an odd Device Index number and the secondary is
assigned the next higher even number (primary Device Index + 1). A non-redundant
controller must always be assigned an odd Device Index number, (otherwise it will be
flagged as an error).
During normal operation the display on the controller faceplate shows the Device Index
as part of the rotating display of information.
R301.1
11/06
Time management in the C300 Controller
Experion C300 Controller User's Guide
Honeywell
Configuration overview
Specifying a Time Server
for more
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