NOTICE
If X44/10 is activated in selection
[2] Safe Stop Alarm
or
[3] Safe Stop Warning
, this signal is ignored. However, the
MCB 112 is still able to activate STO.
Example
:
[5] PTC 1 Warning
is selected in
parameter 5-19 Terminal 37
Safe Stop
, and X44/10 is not activated, but STO is. This is
an unexpected selection.
[5] PTC 1 Warning
in
parameter 5-19 Terminal 37 Safe Stop
specifies that STO is
only triggered from MCB 112.
+: Activated
-: Not activated
Function
Number X44/10 (DI)
STO terminal
37
PTC 1 Alarm
[4]
+
-
-
+
PTC 1 Warning
[5]
+
-
-
+
PTC 1 & Relay A
[6]
+
-
PTC 1 & Relay W
[7]
+
-
PTC 1 & Relay A/W
[8]
+
-
PTC 1 & Relay W/A
[9]
+
-
Table 6.2 Unexpected Combinations Triggering Alarm 72
Dangerous Failure
NOTICE
For correct and safe use of the STO function, follow the
related information and instructions in the
VLT
®
Frequency Converters - Safe Torque Off Operating
Instructions
.
Maintenance and Troubleshoo...
VLT
®
PTC Thermistor Card MCB 112
20
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MG33V302
6
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