Fuji Electric PXG-9 - Reading Read-Only Word Data (Function Code: 04 H)

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Chapter
Reading Read-Only Word Data (Function Code: 04H)
The unit reads word data continuously for the specified number of words from the first number to start reading from.
The slave forwards the read word data from the upper number of bytes to the lower number.
Message Composition
Function Code 04H
Max. No. of Words to Read in One Message 37 bytes
Relative Address 0000H to 0064H 03E8H to 044CH
Resistor Number 30001 to 30100 31001 to 31100
Contents Internal Calculation Value Engineering Unit
Master Slave
Command Message Composition
(bytes)
Station No.
Function Code
No. to Start Reading
(Relative Address)
Upper number
Lower number
No. of Words to Read
(1 to 15 words)
Upper number
Lower number
CRC Data
Upper number
Lower number
Reply Message Composition (bytes)
Station No.
Function Code
No. of Bytes to Read
(No. of Words to Read x 2)
First Word Data
Contents
Upper number
Lower number
Next Word Data
Contents
Upper number
Lower number
Last Word Data
Contents
Upper number
Lower number
CRC Data
Upper number
Lower number
■ Meaning of Read Word Data
MSB LSB
First Word Data upper byte
First Word Data lower byte
Next Word Data upper byte
Next Word Data lower byte
Last Word Data upper byte
Last Word Data lower byte