Figure 29 Reading Holding Registers State Diagram; Implemented Functions; E.2 Implemented Functions - Michell Instruments Condumax II User Manual

APPENDIX E
E.2

Implemented Functions

03 Read Holding Registers
This function code is used to read the contents of a contiguous block of holding registers
where the master specifi es the starting address and the number of registers to be read.
The fi gure below shows the state diagram of how the message is processed with the
exceptions that may be raised.
ENTRY
Exception Code = 01
68
Address in message = Instrument Address
Function code supported
0x0000 <= Quantity of Registers <= 0X007d
Exception Code = 03
Exception Code = 02
Exception Code = 04
Sends Exception Response
Reading Holding Registers State Diagram
Figure 29
Condumax II User's Manual
Starting Address = OK
AND
Starting Address + Number of Registers = OK
Request Processing
Reading Registers = OK
Sends Response with data
97081 Issue 28.1, July 2018
EXIT