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MVI56E-FLN ♦ ControlLogix Platform
Reference
FA Control Network Ethernet Communication Module
User Manual
ProSoft Technology, Inc.
Page 117 of 155
Transaction Code
Application
65216 to 65399
Reserved (for future expansion)
65400 to 65535
Reserved
4.4.3 Allowable Refresh Cycle Time
Each node always monitors the message frames in the network in the period
from receipt of a token until receipt of the next token to the node. If there is no
message frame in the network in this 1 cycle, this cycle time × 1.2 is specified as
the allowable refresh cycle time.
When the network is started, the allowable refresh cycle time is set to "0". When
a token directed to the node is received 3 times at the start-up, a refresh cycle
measurement will be started. Accordingly, the network does not perform
message transmission before a token is circulated once.
A node that joins in the halfway participation status, starts measuring the refresh
cycle time after the third token reception to the node.
The allowable refresh cycle time is dynamically determined depending on the
number of nodes joining the network.
4.4.4 Memory Resources
The module provides 8700 words for shared Area 1 and Area 2 Common
Memory.