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Chapter 3 Functional Comparisons; Functional Comparisons Of Melsec-i/olink And Anywire Db A20 - Mitsubishi Electric MELSEC-I/OLINK Handbook

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3
FUNCTIONAL COMPARISONS
3

3.1 Functional Comparisons of MELSEC-I/OLINK and AnyWire DB A20

Item
Remote station
Communication with up to 16 slave
communication
stations is possible.
XY address of the master station becomes
Remote station address
the XY address of the remote station
module.
The LED display (ERROR STATION) on
Detection of faulty
the master station notifies a user of faulty
station (display)
stations.
When an error is detected, the CPU
Notification method
module is notified by Fuse blown detection
RAS
of the error
(M 9000). External output is also
function
detection to the
performed from the RUN A/B terminals on
CPU module
the MELSEC-I/OLINK master module.
Cable disconnection can be checked by
Line check
the ON status of the LEDs on the master
station and slave stations.
Error check of
If there is a station that is not connected,
disconnected
the error check can be disabled by setting
Others
station enabled/
the ON LINE STATION switch of the
disabled setting
master station to off.
3
- 1
FUNCTIONAL COMPARISONS
3
Specifications
MELSEC-I/OLINK
: Compatible,
AnyWire DB A20
Communication with up to 128 slave
stations is possible.
I/O information is stored in the buffer
memory.
The device that data are read from and
written to the buffer memory by the
FROM/TO instruction will be assigned
to the remote station module address in
the program.
The LED display (ALM) on the master
station notifies a user of faulty stations.
An error is notified by the I/O signal
(Xn4: Disconnection detected) from the
AnyWire DB A20 master module. Note,
however, an external output is not
performed from terminals.
Cable disconnection can be checked by
the ON status of the LEDs on the
master station and slave stations.
The master station is provided with a
function to automatically recognize the
number of occupied points and the set
address of the connected station.
: Partially changed, ×: Not compatible
Compat-
Precautions for
ibility
replacement
Program change or different
remote station module line
×
numbers are required
because the concept of the
addresses is different.
Change of the sequence
program is required because
the notifying device differs. If
an external output is required,
an output signal is necessary.
Though the setting method
differs, a station that is not
connected can be detected.

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