Commands And Responses (Communication/Modbus); Monitor Value Read (Communication/Modbus) - Omron E5AR - MANUAL 2 User Manual

7.9 Commands and responses (Communication/Modbus)

The E5AR/ER provides a set of command frames that make use of variable area read/write commands,
operation commands, and other services provided by the Modbus communication protocol.
E5AR/ER command frames are explained below.

■ Monitor value read (Communication/Modbus)

Command
Response

7.9 Commands and responses (Communication/Modbus)

Slave Function Read start
Number of
address mode address
elements
H'03
1 1 2
Monitor value
Address
Ch Data name
H'0400 Version
H'0402 Modification type
H'0404 PV
H'0406 1 Internal SP
H'0408 Bank No. monitor
H'040A PID Set No. monitor
H'040C Status
H'4400 Version
H'4402 Modification type
H'4404 PV
H'4406 2 Internal SP
H'4408 Bank No. monitor
H'440A PID Set No. monitor
H'440C Status
This command is used to read the PV, status, and other monitor
values. The number of elements can be set from H'0004 to 006A (4 to
106) to allow reading of monitor values in contiguous addresses.
When used in setting area 1, the response for the PV and internal SP
is "0" and the response for the status is as indicated in the notes in
"Appendix Setting list Status" (P.A-8).
Slave Function Byte Read data
address mode count Data 1
H'03 Most significant Least significant
1 1 1 Number of elements 2 bytes
Data n
Most significant Least significant
The above indicates a normal end. For information on error responses,
see "7.5 Reading the variable area" (P.7-10).
CRC-16
2 2 bytes
Address
Ch
H'8400
H'8402
H'8404
H'8406 3
H'8408
H'840A
H'840C
H'C400
H'C402
H'C404
H'C406 4
H'C408
H'C40A
H'C40C
Data 1
Data n CRC-16
2
Monitor value
Data name
Version
Modification type
PV
Internal SP
Bank No. monitor
PID Set No. monitor
Status
Version
Modification type
PV
Internal SP
Bank No. monitor
PID Set No. monitor
Status
7-17