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4. SElTlNGS AND PROCEDURES BEFORE OPERATION
MELSEC-A
4 3
Settings
4.3.1
Setting the dedicated protocol, no-protocol mode, or bidirectional mode
The details are as described in the corresponding section in the AJ71 C24-S8
User's Manual.
4.3.2
Setting of transmission specifications, main channels and terminal
resistance
Setting
of
Switches
I
(1) Main channel
ON
OFF
I
Setting
Switches
I
The main channel in the above table refers to the interface to which the
computer is connected. The main channel setting isvalid only for modes
A to D.
SW23
SW24
In other modes, the setting switch may be in the ON or OFF position.
Setting
(Section 4.5.4 gives the setting examples for different system configu-
rations.)
Computer
: % d r o p
link selection
I
Unusable
Setting the main channel defines data flow as shown below:
Position
of
Setting
Switch
Data received through the main channel is automatically transmitted
through the sub channel.
Data received through the sub channel is automatically transmitted
4
through the main channel.
Notes
Computer link
-
Multidrop link
-
Must be
set
to ON
-
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