F3 DIO 16/8 01
4 Start-up
HI 800 177 E Rev. 2.00
Page 49 of 60
4.6.3
2-Pole Connection to Common Ground (3-pole Connection)
2-pole channels can be interconnected on a common ground to allow line diagnosis, e.g., with
motors (dual motor drivers) or dual valves. The common ground is created using the DO-
outputs of the channels concerned. To do so, the
DO[xx][xx].In Pairs
system parameter must be
configured for each pair (2 channels). For further configuration variants, also refer to Table 26
and Table 31. If the line diagnosis is configured on both channels, the line is diagnosed pairwise
on both 2-pole channels (channel 1 and 2, channel 3 and 4, channel 5 and 6, channel 7 and 8).
To this end, set the
Line Monitoring [BOOL] ->
system variable in SILworX to TRUE and the
DO[xx]-LSLB Monitoring
system signal in ELOP II Factory to TRUE. If a test is performed on
one channel, the second channel is switched off to ensure that the line diagnosis is not
distorted.
A short-circuit between the two DO+ lines is not detected.
A detected line fault is reported to the user:
In SILworX, with the system variables
-> + Error Code [WORD]
or
-> - Error Code [WORD]
.
In ELOP II Factory, with the system signals
DO[xx].+Error Code
or
DO[xx].-Error Code
.
F3 DIO 16/8 01
Load (Motor, Valve)
Free-Wheeling Diode
Figure 13: 2-Pole Connection to Common Ground (3-pole Connection)
i
Inductive loads must be connected with a free-wheeling diode on the consumer load.