ARDETEM TPI-SI 40 Series, User Handbook Manual

Page: 29 / 32

p28
2 bytes
CRC 16
• Measure:
Value of the measure for any chosen mode (transmitter or display) and for
all input types (process or temperature).
In mode transmitter (SCALE NO) : the measure has the physical magni-
tude of the selected input (mV, mA, etc...) and has the value of the direct
measure to which will apply a cut-off if selected, a square root extraction or
a special linearisation. This value is taken up without the decimal point. To
know the transmitted resolution according to the selected input, see the data
indicated before for the direct measure (eg. : in mA input, a measure of 10
123 corresponds to 10,123 mA).
In mode display (SCALE YES) : the measure has the physical magnitude
selected for the display (liters, kilos, etc...). The value of the measure is
taken up without the decimal point. To read the value of the decimal point,
read the word at address 120.
bit 15
bit 2 bit 1 bit 0
Position of the decimal point from
1 to 4
1: Display with 3 decimals
2: Display with 2 decimals
3: Display with 1 decimal
Slave
number
1 byte 1 byte
Function
3 or 4
2 bytes
CRC 16
1st word
MSB
address
LSB
9.2 Description of the born Modbus functions :
Reading of N words: Function n°3
Nbr of
MSB
words
LSB
2 bytes 2 bytes
Slave
number
1 byte 1 byte 1 byte
Function
3 or 4
2 bytes
CRC 16
Number
of read
bytes
Response pattern
:
1st word
MSB
value
LSB
2 bytes
2nd word
MSB
value
LSB
2 bytes
Save
number
1 byte 1 byte
Function
16
2 bytes
CRC 16
1st word
address
Nbr of
words to
be enfor.
Writing of N words: Function N°16:
Request pattern :
Value of the words
to be enforced
2 bytes 2 bytes
Nbr of
words to
be enfor.
2 bytes
Nbr of
bytes to
be enfor.
1 byte
n bytes
Slave
number
1 byte 1 byte 1 byte
Function
16
1st word
address
Response pattern:
Request pattern :
2 bytes
CRC 16
Slave
number
1 byte 1 byte
Function
6
2 bytes
CRC 16
Address
of the
word
Writing of 1 word: Function N°6:
Request pattern :
2 bytes
Value of
the word
to be enf.
2 bytes
Value of
the word
to be enf.
2 bytes
Slave
number
1 byte
1 byte 2 bytes
Function
6
Address
of the
word
2 bytes
CRC 16
Slave
number
1 byte 1 byte 1 byte
Function
reques-
ted with
MSB=1
Error
code
Response pattern:
Exception pattern
:
Values of the error codes:
1: Unknown function code
2: Address incorrect
3: Data incorrect
9: Writing impossible
254 03 0 206
9.3 Reading in double integer format
:
Example : Reading of the displayed measure
Request :
0
Address
Reading
of n words
Slave
number
Number of words
In temperature input:
The measure is transmitted in 1/10th of degree, whichever the programmed
resolution.