Mitsubishi Melsec-L Series User Manual page 34

Function
DC code control
(including Xon/Xoff
control)
Transmission
control
DTR/DSR control
Independent operation of each
interface
Linked operation of each interface
Parameter registrations to the flash
ROM
Remote password check function
Enabling or disabling echo back of
the RS-422/485 interface
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Description
This control notifies the availability of data
reception in the host station and the
effective range of sent/received data to
external devices, using the data for
transmission control in the C24.
This control notifies the availability of data
reception in the host station to external
devices, using the ER(DTR)/DR(DSR)
signal of the RS-232 interface.
Two interfaces of the C24 perform data
communication with external devices
without connecting each other.
All data received from one of the two
interfaces is transmitted from the other
interface.
Initial values of the buffer memory can be
changed by setting each parameter and
writing to the flash ROM.
Checks the password in the C24 when a
remote user accesses to the LCPU with
the modem function. This function
prevents unauthorized accesses to the
LCPU.
When data are sent through RS-485 (2-
wire type) from the RS-422/485 interface,
the same data are also sent to RDA or
RDB in the host station. Whether to
receive the returned data or not (discard)
can be specified.
Nonproced
Bidirectional
MC ural
protocol
protocol
3 SPECIFICATIONS
( : Applicable protocol)
Pd Reference
User's manual
(Application)
Section 7.3
Section 7.3.5
Section 7.4
User's manual
(Application)
Section 6.3.5
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