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State of alarm
104
NO_CURRENT
bit
phase 3
OVERHEAT ALARM
Each power module has one temperature sensor for the internal heat sink and two additional temperature sensors connected to the
LINE and LOAD terminals.
Temperature levels are shown in variables INNTC_SSR, INNTC_LINE and INNTC_LOAD.
The over_heat alarm trips when at least one of the temperatures exceeds a set threshold.
Is also saved in INNTC_SSR_MAX the maximum temperature reached by INNTC_SSR.
This condition may be caused by obstructed ventilation slits or by a stopped cooling fan. With the over_heat alarm active, the control
disables control outputs OUT1, OUT2 and OUT3.
There is an additional maximum temperature protection that hardware disables the SSR controls.
655*
534*
535*
679*
FUSE_OPEN AND SHORT_CIRCUIT_CURRENT ALARMS
The FUSE_OPEN alarm trips when the internal high-speed fuse (optional) opens.
The SHORT_CIRCUIT_CURRENT alarm trips when peak current on the load exceeds the maximum limit (corresponding to twice the
rating) during the softstart ramp or at first power-on (with softstart ramp disabled).
If configured (parameter Fr.n other than zero), the device restarts automatically in softstart for a maximum of Fr.n attempts, beyond which
it remains deactivated while awaiting manual reset with front panel key BUT or with the
control via serial (bit 109).
456
fr.n
RESET
FUSE_OPEN /
109*
SHORT_CIRCU-
bit
IT_CURRENT
ALARMS
Read state
40
OFF = Alarm OFF
R
ON = Alarm ON
R R
INNTC_SSR
R R
INNTC_LINE
R R
INNTC_LOAD
R R
INNTC_SSR_MAX
Number of restarts in case of
R/W
R/W
FUSE_OPEN / SHORT_
CIRCUIT_CURRENT
OFF =
-
ON = Reset FUSE_OPEN /
R/W
R/W
SHORT_CIRCUIT_CURRENT
alarms
with 3-phase load
10.0 ....120.0 °C
10.0 ....120.0 °C
Overheat alarm
10.0 ....120.0 °C
10.0 ....120.0 °C
Overheat alarm
10.0 ....120.0 °C
10.0 ....120.0 °C
Overheat alarm
10.0 ....120.0 °C
10.0 ....120.0 °C
80997D_MSW_GFW_400-600_04-2021_ENG
0
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