User manual

Connecting XBT Terminals
70
33003962 11/2011
Unplugging the PLC cable during operation may lead to the loss of requests or
responses exchanged between the terminal and the PLC.
*For additional information, refer to NEMA ICS 1.1 (latest edition), Safety Guidelines
for the Application, Installation, and Maintenance of Solid State Control.
WARNING
UNINTENDED EQUIPMENT OPERATION
z Never remove the PLC cable from the XBT terminal while operations are in
progress.
z Check the XBT terminal connection by monitoring the communication
monitoring word in the dialog table via the PLC program.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
LOSS OF CONTROL
z The designer of any control scheme must consider the potential failure modes
of control paths and, for certain critical functions, provide a means to achieve a
safe state during and after a path failure. Examples of critical control functions
are emergency stop and overtravel stop.
z Separate or redundant control paths must be provided for critical control
functions.
z System control paths may include communication links. Consideration must be
given to the implications of unanticipated transmission delays or failures of the
link.*
z Each implementation of a Magelis XBT N/R/RT must be individually and
thoroughly tested for proper operation before being placed into service.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.