Read-Out Of Read Only Word Data [Function Code:04H] - Teledyne 7500 Instruction Manual

Infrared gas analyzer communication functions (modbus)
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6.2 Read-out of read only word data [Function code: 04
Function
Max word number
code
read-out in one
message
04
64 words
H
(1) Message composition
Command message composition (byte)
Station No.
Function code
Read-out start
Upper
No. (relative
Lower
address)
Read-out word
Upper
number
Lower
CRC data
Lower
Upper
* Arrangement of read-out word data
MSB
Upper byte of contents of the first word data
Lower byte of contents of the first word data
Upper byte of contents of the next word data
Lower byte of contents of the next word data
Upper byte of contents of the last word data
Lower byte of contents of the last word data
(2) Function explanations
Word data of continuous word numbers from the read-out start No. can be read. Read-out
word data are transmitted from the slave station in the order of upper and lower bytes.
]
H
Relative data
Resister No.
address
0000
00BD
30001 30190
H
H
0425
0447
31062 31096
H
H
Response message composition (byte)
Station No.
Function code
Read-out byte number
Content of the first
word data
Contents of the
next word data
Contents of the
next word data
CRC data
18
Teledyne Analytical Instruments
Contents
Measurement
value and status
Fixed setting
Upper
Lower
Upper
Lower
Upper
Lower
Lower
Upper
LSB

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