System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Multipolling
Aastra Proprietary Information Page 2-39
2.5.4 Multipolling
In multipolling operation, which represents a special polling option, several
converters located on one module can be involved in the polling function.
The master station can request the sub-stations involved in multipolling to
send their data. Only one sub-station can transmit data to the master station
at a time.
If several converters of the same module shall participate in multipolling, the
total number of converters concerned must be indicated. The converters
following the one entered as first multipolling converter are defined as
further multipolling converters (sub-stations).
In the last converter of the polling link, info no. 10 "Block VF in case of
incoming b-bit" must be set in the decentral card slot data of the converter.
Note: Multipolling is supported by analog KZU modules with
drawing no. 62.7006.xxx.xx and 62.7026.xxx.xx.
Example: Converter 3 of the module accommodated in card slot 12 is the
first multipolling converter.
Total number of multipolling converters: 3
Converters 3, 4 and 5 are thus defined as multipolling converters on the
module accommodated in card slot 12.
The first multipolling converter on the module located at the beginning of the
multipolling section, is defined as multipolling master automatically (master
station). On this module, only one converter can be defined as multipolling
converter.
Converters not participating in multipolling can be used as normal
converters, polling converters or ring polling converters.
Figure 2.20: Multipolling configuration
Node 1
Node 2
Node 3 Node 4
Converter
Subscr.1
Converter Converter Converter
PPP PP P
Subscr.1 Subscr.2 Subscr.1 Subscr.2 Subscr.1 Subscr.2
Multipolling start
Sub-
station
Sub-
station
Sub-
station
Sub-
station
Sub-
station
Sub-
station
Master
station