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COMMUNICATION EXCEL 50/100/500/600/800
EN2B-0092GE51 R0512 56
synchronization process. Any new device added to the system bus will adopt the
bus system time.
NOTE: If you enter the time on the local MMI of an older device (prior to
V2.0.xx), synchronization will not be carried out. Even the locally entered
time might be overwritten by a synchronization coming from a newer
device (V2.0.xx or higher).
Point Refreshing
Excel controllers provides a refresh mechanism (that is adapted to the Token
timing) for sending the values of the attributes "Value", "Manual Value", "Operating
Mode", and "Alarm Status" to either an MMI interface or to a front-end. (A maximum
of two point refresh messages can be sent while the controller is holding the
Token.)
PC Communication
An Excel 50/100/500/600/800 system can also accommodate a PC connected to
the C-bus. Multi-master communication is still supported and token passing
continues between the individual bus devices. The C-bus treats controllers as being
equal in rank to a PC.
Excel IRC
Excel controllers support communication with the Excel IRC control system. This
system monitors and controls individual rooms within a building. The Excel IRC
system communicates on the C-bus via its Multicontroller (MC). The Application
control functions for Excel IRC, called ACFs, are all processed by the MC.
See EXCEL 5000 IRC Integration System Overview and Application Guide,
EN3R-1182GE51, for additional information.
Remote Communication
Excel 50/100/500/600/800 controllers are all able to communicate to remote
building supervisors via an analog or ISDN modem connected to them. This allows
two-way communication between the building supervisors and the controllers. The
Excel 100/500 controllers can store the numbers and passwords for up to three
supervisors and can call them in response to critical alarms or other programmed
triggers, or the supervisor can call at any time for status, trend, or alarm
information.
Disable dial-out (V2.04.xx or higher) Automatic upload of the remote trend buffer can be disabled by a remote front-end
(XBS 1.6.0 or higher). In this case, remote trend values are stored in the buffer, with
newest values overwriting oldest when the buffer is full, but the controller does not
dial out to send remote trend buffer level alarms or to flush the buffer. The controller
will still dial out for critical and uncritical alarms.
Excel 100 and 600 controllers and Excel 500 controllers with V1.5.xx firmware or
earlier can, when operating as stand-alone controllers, make use of the XDM506
modem submodule mounted on the CPU board. The XDM506 can perform all of the
functions of the XM100A in providing remote communication capability with up to
three building supervisors.
Direct modem connection
(Excel 50/500,
V2.01.xx or higher and
Excel 800, V3.00.xx or higher)
Excel 50/500 controllers with firmware version V2.01.xx or higher, Excel 100C
controllers, as well as Excel 800 controllers with firmware version V3.00.xx or higher
have the advantage of allowing direct connection of a modem or ISDN terminal