At&T = Alarm Type And Test Type (Internal/External) - Bender ISOMETER isoEV425 Manual

Modbus register assignment of the ISOMETER®
8.1.2.2 AT&T = Alarm type and test type (internal/external)
Bit 7
X
X
0
X
X
X
X
X
X
0
0
1
The alarm type is coded by the bits 0 to 2. Bits 3, 4 and 5 are reserved and al-
ways have the value 0. Bit 6 or 7 is usually set when an internal or external test
has been completed. Other values are reserved. The complete byte is calculat-
ed from the sum of the alarm type and the test type.
isoEV425_D00126_09_M_XXEN/03.2019
6 5 4 3
X X X X
X X X X
0 X X X
X X X X
X X X X
X X X X
X X X X
X X X X
X X X X
0 X X X
1 X X X
0 X X X
2 1 0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
... ... ...
1 1 1
X X X
X X X
X X X
Description
No alarm
Pre-warning
Device error
Reserved
Warning
Alarm
Reserved
Reserved
Reserved
No test
Internal test
External test
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