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Operation modes and settings
Power Quality Recorder SICAM Q80 7KG8080, System manual
E50417-H1076-C420-A2, Release 12.01.2015
Data format
Variables of complex data types are stored in the Modbus holding-register (i.e. variables larger than one holding-
register, e.g. 32-bit measurement values) according to the following convention:
The lowest-address register contains the most significant byte (MSB), the highest-address register contains the least
significant byte (LSB).
No.
Name
Size
1
IEEE float
4 Byte
S | Exponent (8Bit) | significand (23 Bit)
Byte 3 | Byte 2 | Byte 1| Byte 0 (LSB |
2
16 Bit integer
2 Byte
Byte 1 | Byte 0 (LSB)
3
32 Bit Integer
4 Byte
Byte 3 | Byte 2 | Byte 1 | Byte 0 (LSB)
4
String
Byte
pro Character with spaces (20h) at the end
Boole
2 Byte
0 or 1
Identification of invalid values
No.
Name
Invalid value
1
IEEE float
NaN (not a number), >= 1e30, <= -1e30
2
16 Bit integer
32,767 (7FFF hex)
3
32 Bit Integer
2147483647 (7FFF FFFF hex)
5.1.3.4.1 Modbus commands 4U4I
Holding Register address 0 through 50: values do not change during the measurement
No
Register-
offset
Content
Format
Unit
Sample value
Value range
1
0
MLFB
string
-
7KG8080
15 characters
2
8
Serial number (SN)
int32
-
9140133
100000..99999999
3
10
Last adjustment
int32
-
12092011 =
12.09.2011
4
12
Q80 Manager Version
int32
-
2010000
V 2.1
5
14
PQ FW Main
int32
-
3090300
V 3.9 R3
6
16
PQ FW extended
int32
-
1010200
V 1.1 R2
7
18
Base FW
int32
-
02070500
V 2.7 R 5 SP 00
8
20
Operation mode
int32
-
1
1 = 4 U
2 = 4 I
3 = 4 U, 4I
4 = 4 U S2
5 = 8 U
9
22
Active measurement
groups
int32
-
U1..U3, I1..I4, DO
0x2707
(10 0111 0000 0111)
Bit-oriented
DD IIII UUUU UUUU = 14 Bit
20 ... 27 = U1..U8
28 ... 211 = I1..I4
212 = DI 1..4
213 = DO 1..4
System 1
U1..U4
10
24
nominal voltage
float32
V
230.00
11
26
operating voltage LN
float32
V
225.00
12
28
operating voltage LL
float32
V
389.71
13
30
input range U4
float32
V
100.00