FieldServer Lutron Machine FS-8700-97 - Manual (Page 24)

FS-8700-97 Lutron Machine Manual Page 24 of 24
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Appendix A. Useful Features
Appendix A.1. Map Descriptor Functions
Function Description
Rdbc This is an active Map Descriptor which polls the device once every scan interval.
Arco
The Arco function is the same as Rdbc except that the length of the Map Descriptor is taken as the
number of zones to poll. The start zone number is specified under the Zone Map Descriptor field.
More than one Arco Map Descriptor may be used to poll two series of zone numbers, eg. from 5-
10 and from 300-340. Arco Map Descriptors with Length 1 perform the same function as Rdbc
Map Descriptors with the same length.
Awt
This function is used to effect a single data write per trigger. The write only occurs when the Data
Array is updated.
Passive_Client
The Server device writes to the FieldServer’s Data Arrays, and the Client device reads the data
from the same Data Arrays.
Arcs
This function will perform the same operation as an Rdbc (Arc) function, but will sequence
through the range of addresses starting at "Address" and wrapping at "Address + Length". A
length of 1 will be used for every one of the Addresses that gets polled.