Mitsubishi Electric MELSEC-A Series Manual page 153

4
REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)
(2) QnA/QnAS series
Item
Communication
using B/W
Communication
using X/Y
Cyclic transmission
stop/restart
Inter-link data
transfer function
Direct access to the
link devices
Increase of sending
points by mounting
multiple modules of
the same network
No.
Default of network
refresh parameter
Transient
transmission function
Routing function
Group function
Dedicated link
instruction
Specification of
default network
Clock setup for
stations on network
with peripheral
device
Control station shift
function
Multiplex transmission
function
Reserved station function
Description
QnA/QnAS series
*1
MELSECNET/10 module MELSECNET/H module
Performs communications with all stations using link
relay and link register. (Communication using B/W)
Performs communications between I/O master station
and the other station in pairs. (Communication using X/Y)
Stops cyclic transmission temporarily with GX Works2 or
GX Developer.
Transfers link data to multiple networks using parameters
all at once, when multiple networks are connected to one
programmable controller.
Reads/writes directly from/to link device of the network
module on the sequence program.
Allows multiple modules, of which the network No. are
the same, to be mounted to one programmable controller
and increases sending points per one station up to 8000
bytes.
Eliminates the refresh parameters setting by using
default values of refresh parameters.
Communicates only when communication requests are
issued between each stations. (Communication using
dedicated link instruction and GX Works2/GX
Developer.)
Performs transient transmission to other stations of which
network No. are different.
Performs transient transmission to all stations in the
group with an instruction.
Performs communications with other station at desired
timing using dedicated link instruction.
Processes the requests that cannot specify network No.
of access path.
Performs clock setup to CPU modules connected to the
network with GX Works2 or GX Developer.
Enables to continue data link by switching normal station
to sub-control station, even if control station is in failure.
Performs high-speed communication using duplex
transmission channel (forward loop/reverse loop).
Treats the stations, which are to be connected in the
future, as reserved stations.
By specifying the stations, which are not connected, as
reserved stations, communication error does not occur.
: Compatible, : Partial change required, ×: Incompatible
Compat-
Q series
Precautions for replacement
ibility
*2
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