EtherNet/IP adapter functionality
13
3.3
Behaviour on errors
3.3.1
Ethernet/IP errors
The BG02-EIP checks, if cyclic data exchange is active. If the Ethernet/IP scanner (PLC) stops sending
data to the BG02-EIP (either because the PLC’s communication controller is stopped or there is any
kind of network problem) it brings its Profibus-outputs to a safe state (all outputs are set to zero).
Starting with firmware version V1.3 it completely stops all Profibus communication. In that case the
KE/SE’s SMpdp will report a PLC communication error and the System Failure LED’s on the SE/KE (and
the tightening tool) will get activated.
The timing is as follows:
a)
Ethernet/IP-communication stops:
1.
BG02-EIP detects that Ethernet/IP communication is stopped. The timing depends on
the update rate defined during communication establishment with the Ethernet/IP
scanner. Immediately after this condition is detected, the Profibus-operation is stopped
(~ 20ms). This condition is now signaled on the “A”-Led on the BG02-EIP front panel (it
blinks green/red or it blinks red).
2.
After the Profibus is stopped, the SE/KE’s SMpdp waits for the Profibus watchdog to
timeout (about 500ms). After the timeout, the system error signal of the tightening
system is set internally and the LED’s on the tool will start to blink.
To summarize: after approx ½ second, this condition is indicated to the worker.
b)
Ethernet/IP goes back on line: It takes some more time to reinitialize the communication
with the Ethernet/IP scanner (PLC) (approx 3-5 sec). Then the Profibus is reinitialized again
and the system error signal inside the KE/SE is automatically reset.
To summarize: it takes about 3-5 seconds after an Ethernet/IP disconnect to bring everything
back on line.
3.3.2
Profibus errors
The BG02-EIP checks, if profibus data exchange is active. It monitors and detects, if the Profibus is
not in data exchange state (DX) (either because the SE/KE SMpdp is not configured correctly, not
working or there is a problem with the Profibus cable, e. g. cable disconnected). Starting with
Firmware Version V1.4 the BG02-EIP brings its Ethernet/IP-outputs to a safe state (all outputs are set
to zero) in that case.
In all Firmware versions, the Profibus communication state is indicated with LED B (see chapter
1.4.3).
