Mitsubishi Electric FR-CC2-N Series, Инструкция по эксплуатации

Страница: 126 / 184

125
5. PARAMETERS
5.7 (N) Communication operation parameters
1
2
3
4
5
6
7
8
9
10
• Normal response (Response message)
• Query message setting
• Content of normal response
The contents in the normal response ( a to d , including the CRC check) are the same as those in the query messages.
 Example) Write 2 (H02) to 41190 (Pr.190) and 8 (H08) to 41191 (Pr.191) of slave address 25
(H19).
Query message
Normal response (Response message)
 Read holding register access log (H46 or 70)
• Queries by function codes H03 and H10 are supported. The number and start address of holding registers successfully
accessed by the previous communication are returned. "0" is returned for both the number and start address for queries
other than the function codes above.
• Query message
• Normal response (Response message)
• Query message setting
a. Slave address b. Function c. Starting address d. No. of registers CRC check
(8 bits)
H10
(8 bits) H
(8 bits) L
(8 bits) H
(8 bits) L
(8 bits) L
(8 bits) H
(8 bits)
Message Description
a Slave address Set the address to send messages to. Setting "0" enables broadcast communication.
b Function Set H10.
c Starting address
Set the holding register address from which to start writing the data.
Starting address = start register address (decimal) - 40001
For example, when starting register address 0001 is set, the data of holding register address 40002
is read.
d No. of registers Set the number of holding registers for writing data. Data can be written to up to 125 registers.
e Byte count The setting range is H02 to HFA (2 to 250). Set twice the value specified by d .
f Data
Set the amount of data specified by d . Write data is output Hi bytes first followed by Lo bytes, and
is arranged as follows: data of start address, data of start 1, data of start 2, and
so forth.
Slave
address
Function Starting address No. of registers Byte count Data CRC check
H19
(8 bits) H10
(8 bits) H04
(8 bits) HA5
(8 bits) H00
(8 bits) H02
(8 bits) H04
(8 bits) H00
(8 bits) H02
(8 bits) H00
(8 bits) H08
(8 bits) —
(8 bits) —
(8 bits)
Slave
address
Function Starting address No. of registers CRC check
H19
(8 bits) H10
(8 bits) H04
(8 bits) HA5
(8 bits) H00
(8 bits) H02
(8 bits) —
(8 bits) —
(8 bits)
a. Slave address b. Function CRC check
(8 bits)
H46
(8 bits) L
(8 bits) H
(8 bits)
a. Slave address b. Function c. Starting address d. No. of points CRC check
(8 bits)
H46
(8 bits) H
(8 bits) L
(8 bits) H
(8 bits) L
(8 bits) L
(8 bits) H
(8 bits)
Message Description
a Slave address
Set the address to send messages to. Broadcast communication is not possible. (Invalid when "0"
is set.)
b Function Set H46.