Bender COMTRAXX COM462RTU, Руководство пользователя

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26 COM462RTU_D00010_04_M_XXDE / 06.2021
Modbus process image in the memory of the COM462RTU
6.2.6.2 AT&T = Alarm type and test type (internal/external)
Bit 7 6 5 4 3 2 1 0 Meaning
Test e
xt
ernal
Test in
ternal
Sta
tus
Reser
ved
Reser
ved
Alarm Err
ors
Alarm t
ype
X X X X X 0 0 0 No alarm
X X X X X 0 0 1 Prewarning
0 0 X X X 0 1 0 Device error
X X X X X 0 1 1 Reserved
X X X X X 1 0 0 Alarm (yellow LED), e.g. insulation fault
X X X X X 1 0 1 Alarm (red LED)
X X X X X 1 1 0 Reserved
X X X X X … … … Reserved
X X X X X 1 1 1 Reserved
Test
0 0 X X X X X X No test
0 1 X X X X X X Internal test
1 0 X X X X X X External test
The alarm type is coded by the bits 0 to 2. The bits 3 and 4 are reserved and always have the value
0. Bit 5 usually has the value 0 and represents the digital value of the status (this column is rele-
vant for the SMI472 only).
Bit 6 or 7 is usually set when an internal or external test has been completed. Other values are
reserved. The complete byte is calculated from the sum of the alarm type and the test type.