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

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.
Function Code
Max. No. of Words to Read in One Message
Relative Address
Resistor Number
Contents
Message Composition
Chapter
6
Command Message Composition
(bytes)
Station No.
Function Code
No. to Start Reading
(Relative Address)
No. of Words to Read
(1 to 15 words)
CRC Data
■ Meaning of Read Word Data
MSB
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
0000H to 0064H
30001 to 30100
Internal Calculation Value
Master
Upper number
Lower number
Upper number
Lower number
Upper number
Lower number
LSB
04H
37 bytes
03E8H to 044CH
31001 to 31100
Engineering Unit
Slave
Reply Message Composition (bytes)
Station No.
Function Code
No. of Bytes to Read
(No. of Words to Read x 2)
First Word Data
Contents
Next Word Data
Contents
Last Word Data
Contents
CRC Data
– 32 –
Upper number
Lower number
Upper number
Lower number
Upper number
Lower number
Upper number
Lower number