A2.6 Operating Mode Modbus Registers
Tables A2.8 to A2.10 detail the contents of the Modbus registers
accessible while the instrument is in the operating mode.
Two data types are used:
•
32-bit single precision floating point data in IEEE format
•
64-bit double precision floating point data in IEEE format
Note. When writing to a parameter that occupies
more than one register position then all registers relating to
that parameter MUST be written to as part of a multiple
register write. If this is not acheived a NAK exception
response is issued. Individual registers can be read without
causing an exception response.
When accessing a parameter that occupies more than one
register position, the lowest numbered register contains the
most significant data.
A
n
a
o l
g
n I
p
u
s t
A
1
A
2
A
3
A
4
A
5
A
6
B
1
B
2
B
3
B
4
B
5
B
6
R
s e
r e
e v
d
Table A2.8 Analog Inputs
M
o
d
b
u
s
R
e
g
s i
e t
s r
R
a e
d
o
n
, y l
s
n i
g
e l
r p
c e
s i
o i
n
o l f
a
n i t
p
o
t n i
n
u
m
b
r e
–
9
9
9
o t
+
9
9
9
9
0
0
0
1
a
n
d
0
0
0
2
0
0
0
3
a
n
d
0
0
0
4
0
0
0
5
a
n
d
0
0
0
6
0
0
0
7
a
n
d
0
0
0
8
0
0
0
9
a
n
d
0
0
1
0
0
0
1
1
a
n
d
0
0
1
2
0
0
1
3
a
n
d
0
0
1
4
0
0
1
5
a
n
d
0
0
1
6
0
0
1
7
a
n
d
0
0
1
8
0
0
1
9
a
n
d
0
0
2
0
0
0
2
1
a
n
d
0
0
2
2
0
0
2
3
a
n
d
0
0
2
4
0
0
2
5
o t
0
1
0
0
l A
r a
m
N
u
m
b
r e
a
1
A
r a l
m
2
A
r a l
m
3
A
r a l
m
4
A
r a l
m
5
A
r a l
m
6
A
r a l
m
7
A
r a l
m
8
A
r a l
m
9
A
r a l
m
1
0
A
r a l
m
1
1
A
r a l
m
1
2
A
r a l
m
1
3
A
r a l
m
g
1
4
A
r a l
m
1
5
A
r a l
m
1
6
A
r a l
m
1
7
A
r a l
m
1
8
A
r a l
m
1
9
A
r a l
m
2
0
A
r a l
m
2
1
A
r a l
m
2
2
A
r a l
m
2
3
A
r a l
m
2
4
A
r a l
m
R
s e
r e
Table A2.9 Alarm Trip Levels
APPENDIX 2 – MODBUS GUIDE...
r T
p i
P
i o
t n
s (
n i
g
e l
r p
c e
s i
o i
R
a e
: d
–
9
9
n
d
N
a
m
e
W
t i r
: e
–
9
9
1
1 .
A
0
1
0
1
a
n
1
1 .
B
0
1
0
3
a
n
1
2 .
A
0
1
0
5
a
n
1
2 .
B
0
1
0
7
a
n
1
3 .
A
0
1
0
9
a
n
1
3 .
B
0
1
1
1
a
n
1
4 .
A
0
1
1
3
a
n
1
4 .
B
0
1
1
5
a
n
1
5 .
A
0
1
1
7
a
n
1
5 .
B
0
1
1
9
a
n
1
6 .
A
0
1
2
1
a
n
1
6 .
B
0
1
2
3
a
n
2
1 .
A
0
1
2
5
a
n
2
1 .
B
0
1
2
7
a
n
2
2 .
A
0
1
2
9
a
n
2
2 .
B
0
1
3
1
a
n
2
3 .
A
0
1
3
3
a
n
2
3 .
B
0
1
3
5
a
n
2
4 .
A
0
1
3
7
a
n
2
4 .
B
0
1
3
9
a
n
2
5 .
A
0
1
4
1
a
n
2
5 .
B
0
1
4
3
a
n
2
6 .
A
0
1
4
5
a
n
2
6 .
B
0
1
4
7
a
n
e v
d
0
1
4
9
o t
R
e
g
s i
e t
s r
n
o l f
a
n i t
g
p
o
n i
) t
9
o t
+
9
9
9
9
9
o t
+
9
9
9
9
d
0
1
0
2
d
0
1
0
4
d
0
1
0
6
d
0
1
0
8
d
0
1
1
0
d
0
1
1
2
d
0
1
1
4
d
0
1
1
6
d
0
1
1
8
d
0
1
2
0
d
0
1
2
2
d
0
1
2
4
d
0
1
2
6
d
0
1
2
8
d
0
1
3
0
d
0
1
3
2
d
0
1
3
4
d
0
1
3
6
d
0
1
3
8
d
0
1
4
0
d
0
1
4
2
d
0
1
4
4
d
0
1
4
6
d
0
1
4
8
0
2
5
0
79