Mitsubishi Electric FR-A820-00046 Instruction Manual page 997

Parameters
● Content of normal response
Message
² Starting address
¶ No. of points
Tab. 5-376: Description of normal response
Example Read the successful register start address and number of successful accesses from slave address 25
(H19).
Query message
Transaction
identifier
A given value is set.
Normal response (Response message)
Transaction
identifier
The values are the same as those in the query message.
Two successful reads of start address 41007 (Pr. 7) are returned.
FR-A800
Description
The start address of the holding register that was successfully accessed is returned.
Starting address = start register address (decimal) – 40001
For example, when start address 0001 is returned, the holding register address that was
successfully accessed is 40002.
The number of holding registers that were successfully accessed is returned.
Protocol
Length field
Identifier
H00 H00 H00
(8 bits) (8 bits) (8 bits)
Protocol
Length field
Identifier
H00 H00 H00
(8 bits) (8 bits) (8 bits)
Ethernet communication (FR-A800-E)
Unit
Func-
identi-
tion
fier
H02 H19 H46
(8 bits) (8 bits) (8 bits)
Unit
Func-
identi- Starting address
tion
fier
H06 H19 H10
(8 bits) (8 bits) (8 bits)
No. of points
H03 HEE H00
(8 bits) (8 bits) (8 bits)
H02
(8 bits)
5 - 795