Bender ISOMETER isoCHA425 Manual page 25

Modbus register assignment of the ISOMETER®
8.1.2.3 R&U = Range and unit
Bit 7 6 5 4 3 2
- - - 0 0 0
- - - 0 0 0
- - - 0 0 0
- - - 0 0 0
- - - 0 0 1
- - - 0 0 1
- - - 0 0 1
- - - 0 0 1
- - - 0 1 0
- - - 0 1 0
- - - 0 1 0
- - - 0 1 0
- - - 0 1 1
- - - 0 1 1
- - - 0 1 1
- - - 0 1 1
- - - 1 0 0
0 0 X X X X
0 1 X X X X
1 0 X X X X
1 1 X X X X
• The units of 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.
25
1 0 Bedeutung
0 0 Invalid (init)
0 1 No unit
1 0 Ω
1 1 A
0 0 V
0 1 %
1 0 Hz
1 1 Baud
0 0 F
0 1 H
1 0 °C
1 1 °F
0 0 Second
0 1 Minute
1 0 Hour
1 1 Day
0 0 Month
X X Actual value
X X The actual value is lower
X X The actual value is higher
X X Invalid value
Modbus register assignment of the ISOMETER®
8.1.3 Alarm assignment of the relays
Several alarms can be assigned to each relay. For the assignment of each relay, a 16-bit-
register is used with the bits described below. The following table applies to relay 1 and
relay 2, in which "x" stands for the relay number. A set bit activates the specified function.
Display
Bit
indication
When reading, always 0
0 Reserved
When writing, any value
1 x Err Device error E.xx
Pre-alarm R1- Fault R
2 rx +R1 < Ω
Pre-alarm R1- Fault R
3 rx -R1 < Ω
Alarm R2 - Fault R
4 rx +R2 < Ω
Alarm R2 - Fault R
5 rx -R2 < Ω
Alarm message U
6 rx U < V
Alarm message U
7 rx U > V
8 rx test Manually started self test
9 rx S.AL Device start with alarm
When reading, always 0
10 Reserved
When writing, any value
When reading, always 0
11 Reserved
When writing, any value
When reading, always 0
12 Reserved
When writing, any value
When reading, always 0
13 Reserved
When writing, any value
When reading, always 0
14 Reserved
When writing, any value
When reading, always 0
15 Reserved
When writing, any value
Meaning
at L+
F
at L-
F
at L+
F
at L-
F
- Undervoltage
n
- Overvoltage
n
isoCHA425_D00352_01_M_XXEN/10.2019