Output operation during fault and idle modes, Understanding controlnet i/o, Output operation during fault and idle modes -6 – Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual User Manual
Page 26: Understanding controlnet i/o -6
Publication 1747-UM003A-EN-P
3-6 Planning to Use Your ControlNet Adapter Module
Output Operation During Fault and Idle Modes
RSNetworx allows configuration to characterize each module connection
activity during certain operational states.
During idle mode and fault modes, outputs are configured for one of the
following operation states:
Understanding ControlNet
I/O
The ControlNet system is designed to:
•
provide high-speed, repeatable, deterministic I/O transmission
•
allow control and message information to co-exist on the same physical
media
•
make sure that I/O data transfers are not affected by
– programming-terminal message activity
– inter-processor message activity on the network
Scheduled Data-Transfer Connections on a ControlNet Network
Scheduled data transfer on a ControlNet processor:
•
is continuous
•
is asynchronous to the ladder-logic program scan
•
occurs at the actual rate displayed in the Actual Packet Interval field on the
RSNetWorx ControlNet I/O mapping (monitor) screen
NOTE
The electronic keying option offered by RSNetWorx for
rack connections applies to the 1747-ACN15 and
-ACNR15 modules only.
Missing or misplaced modules are not detected if the
module in question is configured within a rack connection.
Critical I/O modules that need to be detected when
missing or misplaced must be configured with individual
module connections.
Output Action
Reset outputs to off
Hold last state
Write Safe State data to outputs