HIMA HIMax X-MIO 6 01, Руководство пользователя

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4 Start-up X-MIO 7/6 01
Page 40 of 72 HI 801 305 E Rev. 5.00
4.3 Line Monitoring (Short-Circuits and Open-Circuits)
The module monitors the sensors (pulse generators) connected to the measuring inputs for
short-circuits (SC) and open-circuits (OC) by monitoring the currents of the sensor supplies.
To this end, the parameters
SC Limit [mA]
and
OC Limit [mA]
must be configured in accordance
with the sensors used. The parameters
SC Limit [mA]
and
OC Limit [mA]
apply to all three
measuring input supplies, see Table 26.
If the
-> SC Limit
value is overrun, a short-circuit (SC) is detected and the
-> SC
variable is set
to TRUE. If the
-> OC Limit
is underrun, an open-circuit (OC) is detected and the
-> OC
variable
is set to TRUE. If the
Supply used
parameter is activated, a detected overrun or underrun of the
parameter values results in a channel fault (
-> Channel OK
= FALSE). If the supplies are not
used, the
Supply used
parameter must be deactivated. In doing so, overrunning or
underrunning the load current does not result in a channel fault (
-> Channel OK =
TRUE).
The module monitors the controlled digital outputs for short-circuits. Inrush current of 2.1...3.3 A
can be present at the outputs for no longer than 2.5 s. The short-circuit threshold for the outputs
is preset, see Table 13. If a short-circuit is detected, the
-> SC
variable is set to TRUE and the
Field
LED and the LED for the affected channel start blinking. Since the SC monitoring is only
active if the outputs are controlled, the fault continues to be reported even if the channel is de-
energized while the short-circuit is present. If the output is energized once again and the short-
circuit is no longer present, the following actions are performed:
 The variable
-> LS
is set to FALSE
 The
Field
LED no longer blinks
 The LED for the affected channel is lit