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9. Communicaiton in Modbus RTU Mode
・
Weighing value reading and zero reset (re-zero) are possible.
・
When using the following models, calibration (sensitivity adjustment) is possible via Mdbus RTU.
When calibrating with a weighing device rather than the ones listed below, use the key, etc. of the weighing device
while looking at the display of the weighing device.
Applicable
model
Sensitivity
adjustment method
Outline of procedure
AD-4212C
External weight
⋆１
While monitoring the balance status with the Holding Register, it is
necessary to instruct data acquisition by Coil and to load and unload the
weight on the weighing instrument.
AD-4212D
External weight
⋆１
Built-in weight
After instruction by Coil, the holding register monitors until calibration is
completed.
⋆１．
When changing the weight value to be used, refer to the instruction manual of the individual weighing device.
■
Notes on Modbus RTU communication with AD-8551R.
・
The function codes and maximum number that can be supported by AD-8551R are as follows.
Code
Function name
01
Read Coils
03
Read Holding Registers
05
Force Single Coil
15
Force Multiple Coils
⋆２
⋆２．
This is possible only when the number of Coils to be rewritten is one.
Caution
Rewriting of Holding Register is not supported.
