990XCP98000 SQUARE D, 990XCP98000 Datasheet - Page 244
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990XCP98000
Manufacturer Part Number
990XCP98000
Description
QUANTUM CPU BATTERY FOR S
Manufacturer
SQUARE D
Datasheet
1.990XCP98000.pdf
(463 pages)
Specifications of 990XCP98000
Rohs Compliant
YES
Battery Capacity
1800mAh
Battery Technology
Lithium
Battery Voltage
3V
Battery Terminals
Connector
Weight
0.12lb
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Functions
6/26
(continued)
Modicon
automation platform
System approach
Ethernet TCP/IP communication services
The Global Data service provides data exchanges in real time between stations
belonging to the same distribution group. It is used to synchronize remote
applications, or to share a common database between a number of distributed
applications.
Exchanges are based on a standard producer/consumer protocol, providing
optimum performance with a minimum load on the network. This RTPS (Real Time
Publisher Subscriber) protocol is promoted by Modbus-IDA (Interface for Distributed
Automation), and has already been adopted as a standard by several
manufacturers.
A maximum of 64 stations can participate in Global Data within the same distribution
group.
Each station can:
b
to n periods of the processor master task (Mast).
b
controlled by status bits (Health Status bits) linked to a refresh timeout configurable
between 50 ms and 1 sec. Access to an element of a variable is not possible. The
total size of subscribed variables amounts to 4k contiguous bytes.
To further optimize the performance of the Ethernet network, Global Data can be
configured with the “multicast filtering” option that works with switches in the
ConneXium range (see pages 6/48 to 6/50), to perform data broadcasting only on
Ethernet ports where there is a Global Data service subscriber station. If these
switches are not used, Global Data is transmitted in “multicast” mode on switch
ports.
Functions (continued)
Global Data service
Characteristics
Global Data service diagnostics
Publish one 1024-byte variable. The publication period can be configured from 1
Subscribe to between 1 and 64 variables. The validity of each variable is
IP multicast 239.255.255.250
Distribution group 2
Ethernet TCP/IP
®
Quantum
Data exchange 4 kbyte max.
Distribution group 1
IP multicast 239.255.255.251
™
Data exchange 4 kbyte max.
The diagnostic screens
use a color code to show
Global Data status:
b
configured/detected fault
b
Configured/not
Published/subscribed
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