Omron SYSDRIVE 3G3MV

7-11
H Message Data Configuration
· Thecommunications message is configuredentirelyofhexadecimaldata.(ASCIIand
FINS are not used.)
· Communications data is divided into the four areas shown in the following table.
Data name Description
Slave address Set the Slave address (the set value in n153) of the Inverter, to
which the DSR message is sent. The Slave address must be
within a range from 00 to 32 (00 to 20 Hex).
Function code A command giving instructions of the details of processing to
the Inverter.
Example: Data read (03 Hex) and data write (10 Hex)
Communications data Data attached to the command.
Example: The register number of read start data and the
number of registers of read data
Error check CRC-16 check code for checking the reliability of the message
data.
Note Intheabovecommunications,thedefaultis --1(65535)andtheLSB(least-signifi-
cantbyte)isconvertedasMSB (most-significantbyte)(intheoppositedirection).
TheCRC-16checkis automatically performed byusing the protocol macro func-
tion of OMRON’s SYSMAC CS1-series orC200HX/HG/HE Programmable Con-
trollers.
H Slave Address
·The Master can communicate with a maximum of 32 Slaves over RS-422/485. A
unique Slave address is allocated to each Slave (Inverter) for communications.
·Slave addresses are within a range from 00 to 32 (00 through 20 Hex). If a DSR mes-
sage is issued to Slave address 00, the message will be a broadcast message.
Note The broadcast message is addressed to all Slaves. Only the RUN command
(register 0001 Hex) and frequency command (register 0002 Hex) can be written
to the message. TheInverter receiving this messagedoes not returnaresponse
regardless of whether or not the message is received properly. Therefore, for
measures against communications errors, the monitor function of the Inverter
should be used for checking the reception of broadcast messages.
H Function Code
·The function code is a command giving instructions of thedetails ofprocessing tothe
Inverter.
Communications Chapter 7