8-5
Chapter 8. Modbus TCP Communication Functions
Amount of data
The amount of data that can be read or written using a 1-frame message is shown
below.
Command type
(Function code)
Amount of data
RAM EEPROM
Multiple data read (03H) 1 to 32 1 to 32
Multiple data write (10H) 1 to 32 1 to 32
1 data write (06H) 1 1
Note
• For details on the specifications for Modbus communication, refer to the
following.
Modicon Modbus Protocol Reference Guide (PI-MBUS-300 Rev. J) by
MODICON, Inc.
• Open MODBUS/TCP Specification (Release 1.0) by Andy Swales (Schneider
Electric)
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