NOTICE
The availability of the individual alarms and warnings are
dependent on the frequency converter type.
Warning and Alarm Messages
There is a clear distinction between alarms and warnings. If
there is an alarm, the frequency converter enters a fault
condition. After the cause for the alarm has been cleared,
the master must acknowledge the alarm message in order
to start operation of the frequency converter again. A
warning, on the other hand, may appear when a warning
condition arises, then disappear when conditions return to
normal without interfering with the process.
Warnings
All warnings within the frequency converter are
represented by a single bit within a warning word. A
warning word is always an action parameter. Bit status [0]
FALSE means no warning, while bit status [1] TRUE means
warning. Each bit status has a corresponding text string
message. In addition to the warning word message, the
master also notifies via a change in the status word.
Bit (Hex) Alarm word 2
(16-91 Alarm Word 2)
00000001 Service Trip, Read/Write
00000002 Reserved
00000004 Service Trip, Typecode/
Sparepart
00000008 Reserved
00000010 Reserved
00000020 No Flow
00000040 Dry Pump
00000080 End of Curve
00000100 Broken Belt
00000200 Discharge high
00000400 Start failed
00000800 Speed limit
00001000 Reserved
00002000 Reserved
00004000 Reserved
00008000 Reserved
00010000 Reserved
00020000 KTY error
00040000 Fans error
00080000 ECB error
00100000 Reserved
00200000 Reserved
00400000 Reserved
00800000 Reserved
01000000 Reserved
02000000 Reserved
04000000 Reserved
08000000 Reserved
10000000 Reserved
20000000 Reserved
40000000 PTC thermistor
80000000 Dangerous failure
Table 6.3 Alarm Word 2
Troubleshooting MCA 122 Modbus TCP
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