Functional Comparisons - Mitsubishi Electric MELSEC-A Series Manual

4
REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)

4.3 Functional Comparisons

(1) A/AnS series
Item
Communication
using B/W
(1:N
communication)
Communication
using X/Y
(1:1
communication)
Constant link scan
function
Data link stop/
restart function
Inter-link data
transfer function
Transient
transmission
function
Routing function
Group function
Control station shift
function
Multiplex transmission
function
Automatic return
function
Loopback function
Station detach
function
Diagnostic function
Data link status
detect function
Description
A/AnS 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)
Keeps link scan time constant.
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.
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.
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).
Returns the station disconnected from data link to the
system when it goes to normal status and restarts data
link.
Keeps normal operation between operable stations by
disconnecting faulty area at error occurrence such as
cable break.
Keeps normal operation between operable stations
except faulty stations and stations switched off.
Checks line conditions of the network and setting
conditions of the module.
Detects faulty area with data of link special relay and link
special register.
: Compatible, : Partial change required, ×: Incompatible
Compat-
Q series
Precautions for replacement
ibility
*2
• LRDP instruction and LWTP
• For comparison of dedicated
Set diagnostic items for station-
to-station test and forward loop/
reverse loop test in GX Works2
or GX Developer network
parameters.
instruction cannot be used.
Change them to ZNRD
instruction, ZNWR instruction,
READ instruction and WRITE
instruction.
link instruction, refer to Section
4.6.2.
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