Modbus register assignment of the ISOMETER®
Modbus register assignment of the ISOMETER®
isoBAT425_D00308_04_M_XXEN/07.2020
28
8.1.2.3
R&U = Range and unit
•
The units of the bits 0 to 4 are coded.
•
Bits 6 and 7 describe the validity range of a value.
•
Bit 5 is reserved.
The complete byte is calculated from the sum of the unit and the range of validity.
Bit
7
6
5
4
3
2
1
0
Meaning
Un
it
-
-
-
0
0
0
0
0
Invalid (init)
-
-
-
0
0
0
0
1
No unit
-
-
-
0
0
0
1
0
Ω
-
-
-
0
0
0
1
1
A
-
-
-
0
0
1
0
0
V
-
-
-
0
0
1
0
1
%
-
-
-
0
0
1
1
0
Hz
-
-
-
0
0
1
1
1
Baud
-
-
-
0
1
0
0
0
F
-
-
-
0
1
0
0
1
H
-
-
-
0
1
0
1
0
°C
-
-
-
0
1
0
1
1
°F
-
-
-
0
1
1
0
0
Second
-
-
-
0
1
1
0
1
Minute
-
-
-
0
1
1
1
0
Hour
-
-
-
0
1
1
1
1
Day
-
-
-
1
0
0
0
0
Month
Ra
n
g
e
o
f
v
a
li
di
ty
0
0
X
X
X
X
X
X
Actual value
0
1
X
X
X
X
X
X
The actual value is lower
1
0
X
X
X
X
X
X
The actual value is higher
1
1
X
X
X
X
X
X
Invalid value
8.1.3 Alarm assignment of the alarm relays
Several alarms can be assigned to each alarm relay. For the assignment of each alarm re-
lay, a 16-bit register is used with the bits described below. The following table applies to
alarm relay 1 and alarm relay 2, in which "x" stands for the alarm relay number. A set bit
activates the specified function. A set bit activates the specified function.
Bit
Display
indication
Meaning
0
Reserved
When reading, always 0
When writing, any value
1
x Err
Device error E.xx
2
rx +R1 < Ω
Pre-alarm R1 - fault
R
F
at L1/+
3
rx -R1 < Ω
Pre-alarm R1 - fault
R
F
at L2/-
4
rx +R2 < Ω
Alarm R2 - fault
R
F
at L1/+
5
rx -R2 < Ω
Alarm R2 - fault
R
F
at L2/-
6
rx U < V
Alarm message
U
n
- undervoltage
7
rx U > V
Alarm message
U
n
- overvoltage
8
rx U V
Message - battery voltage
U
n
is ok
9
rx test
Manually started self test
10
rx S.AL
Device start with alarm
11
Reserved
When reading, always 0
When writing, any value
12
Reserved
When reading, always 0
When writing, any value
13
Reserved
When reading, always 0
When writing, any value
14
Reserved
When reading, always 0
When writing, any value
15
Reserved
When reading, always 0
When writing, any value
