Rockwell Automation T3831 ICS Regent Communications Package for Winterpret - Manual (Page 32)

Communications Package for W INTERPRET (T3831)
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Industrial Control Services
side of the cable fault will not show any transmit or receive
activity.
Check each Regent to see that it transmits its packet
regularly on the effected leg of the network. If a transmit
LED never turns on, but the receive LED does, then this
communications module may be faulty (receiver fault). This
Regent would not receive a poll command and so would not
ever transmit its packet on this leg of the network.
Safety Considerations
The Guarded Peer-Link communications for the Regent is
TÜV certified to Risk Class 5 for safety critical systems. The
GPL communications can be used to transfer safety critical
data between multiple Regents under the following conditions.
1) At least two GPL legs are used and the Net Master of each
GPL network leg is a separate Regent system.
2) The GPL system variables are monitored by the
application program or suitable external operator interface
system to report the status of GPL operations and alarm
GPL fault conditions to operations personnel.
3) Safety critical data configured for GPL shall have initial
and final values configured at each Regent. These values
should be set so that the systems will provide safe process
operations or shutdown if GPL communications are
inactive or fail.
4) During system commissioning, the transfer of all safety
critical data between Regents shall be fully tested and
verified. This includes the verification of the initial values
after GPL initialization, the correct operating values
during GPL activity, and the final values under simulated
GPL fault conditions (GPL fault conditions can be
simulated by disconnecting the network cables for each leg
from the communications modules at the Regent).