User`s manual

6-15
6.6 Command and Transmission Frame Details
INP-TN5A0202-E
6.6
Command and Transmission
Frame Details
Reading Data
Reading Word Data (Function Code: 03H)
The unit reads word data continuously for the specifi ed number of words from the fi rst number to start reading from.
The slave forwards the read word data from the upper number of bytes to the lower number.
Note
When reading out word data continuously, specifi cation beyond the range of the relative address will result in no response.
Do not write data to the number not listed on the MODBUS register numbers. (It might cause the equipment's abnormal
operation.)
Function code 03H
Number of readable words in one message 125
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