Page 69
complete of the fixed tare, with stabilized weight. The gross weight acquired must be reset. It is
possible to repeat this operation several times.
• Up to 5 linearization points on a positive scale are possible. Program the value of the actual weight
loaded and stabilized in the Data Register and send the command 0x0015. It is possible to ve-
rify the successful operation by checking the gross weight acquired, the instrument automatically
switches to the next linearization point; if the weight is not stable the operation is not carried out.
The linearization command (0x0015) can be repeated up to 5 points.
• End the linearization procedure by sending the command 0x0055 after the acquisition of the last
point. It is possible to store a number of points lower than 5.
• Send the command 0x0007 to save the calibration in permanent memory.
INSTRUMENT RESPONSE TIMES
The instrument, to satisfy most requests, uses a variable time in accordance with the programming of
the instrument parameters and the type of request as per table:
Update frequency of measurements
12,5 Hz
50 Hz
100 Hz
250 Hz 1000 Hz
Analogue output update frequency
12,5 Hz
50 Hz
100 Hz
250 Hz 1000 Hz
Fieldbus memory area reading and
update update frequency.
125 Hz
125 Hz
125 Hz
125 Hz
125 Hz
Update frequency of logic outputs.
12,5 Hz
50 Hz
100 Hz
250 Hz 1000 Hz
Status and weight acquisition cycle from
Modbus RTU (*)
𝒇𝒇𝒇𝒇𝒇𝒇𝒇𝒇 =
𝟏𝟏
𝒏𝒏𝒏𝒏𝒏𝒏𝒏𝒏𝒏𝒏 + 𝟖𝟖 ∗ 𝟏𝟏𝟏𝟏
𝒃𝒃𝒃𝒃𝒃𝒃𝒃𝒃
+ 𝟎𝟎, 𝟎𝟎𝟎𝟎𝟎𝟎
Status and weight acquisition cycle from
ASC11 protocol (*)
𝒇𝒇𝒇𝒇𝒇𝒇𝒇𝒇 =
𝟏𝟏
𝒏𝒏𝒏𝒏𝒏𝒏𝒏𝒏𝒏𝒏 + 𝟖𝟖 ∗ 𝟏𝟏𝟏𝟏
𝒃𝒃𝒃𝒃𝒃𝒃𝒃𝒃
+ 𝟎𝟎, 𝟎𝟎𝟎𝟎𝟎𝟎
(*) nchar = sum of characters which make up the request string of the master (Query) and the response
string of the DAT 1400 (Response).
Example of status request, net weight and gross weight (5 registers) at baud rate = 115,2 kbit/sec:
1 / (((8 + 15 + 8) * 10) / 115200) + 0,004) = 149 Hz
Exceptions are:
• the Backup E2prom command (max time = 350mSec.)
• writing of the registers of Cells capacity, Cells sensitivity, Net weight, System tare, Filter (max time
= 550mSec).
Summary of Contents for DAT 1400
Page 2: ...Page II ...
