38
Manual – Controllers DHE/DHF/DHR21B (standard) and DHE/DHF/DHR41B (advanced)
4
Installing the DHF21B/41B option
Assembly and Installation Notes
LED L14 (B/O) LED L14 (Bit-strobe I/O) monitors the bit-strobe I/O connection.
LED L13
(BUS FAULT)
LED L13 (BUS FAULT) indicates the physical state of the bus node.
4.8.6 Connecting SEW safety bus (X38)
Connection to the SEW safety bus system is in preparation.
State of the
L14 LED
State Meaning
Flashing
green
(125 ms
cycle)
DUP-MAC check Unit is performing DUP-MAC check
Off Not switched on/offline but
not DUP-MAC check
• Unit is offline
• Unit is switched off
Flashing
green
(1 s cycle)
Online and in operational
mode
• Unit is online
• DUP-MAC check performed successfully
• A BIO connection is being established with a master
(configuring state)
• Missing, incorrect or incomplete configuration
Lights up
green
Online, operational mode
and connected
•Online
• A BIO connection has been established (established
state)
Flashing red
(1 s cycle)
Minor error or connection
timeout
• Invalid number of process data is set via DIP switches
• A correctable error has occurred
• Bit-strobe I/O connection is in timeout state
Red light Critical error or critical link
failure
• An error that cannot be corrected has occurred
•BusOff
• DUP-MAC check has detected an error
State of the
L13 LED
State Meaning
Off NO ERROR The number of bus errors is in the normal range (error
active status).
Flashing red
(125 ms
cycle)
BUS WARNING
The unit is performing a DUP-MAC check and cannot
send any messages because no other stations are
connected to the bus (error passive state)
Flashing red
(1 s cycle)
The number of physical bus errors is too high. No more
error telegrams are actively written to the bus (error
passive state).
Red light BUS ERROR • BusOff state
• The number of physical bus errors has increased
despite switchover to error-passive state. Access to
the bus is switched off.
Yellow light POWER OFF External voltage supply has been turned off or is not
connected.
To Next Page
Loading...
