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4.10.2 Setting For Melsecnet Data Link - Mitsubishi Electric MELSEC-A Series User Manual

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4.A2CCPU
- - - - - - - - - - - - - - - - - - - - MELSEC·A
4.10.2 Setting for MELSECNET Data Link
(1) Setting station number
The station numbers are determined according to the routing of the
cable (coaxial and/or fiber-optic cables).
Determine the station numbers referring to the MELSECNET (II) Data
Link Reference Manual.
(2) Setting operation mode
This manual describes the setting only for the self-loopback test mode
(link module independent test).
For other setting modes, refer to the MELSECNET (II) Data Link Refer-
ence Manual.
(3) Setting link parameters
Link parameter setting is necessary only for the A2CCPUP21/R21 which
is used as the master station.
For MELSECNET functions, processing methods, device allocation,
refer to the MELSECNET (II) Data Link Reference Manual.
IREMARKI
To operalelhe A2CCPUP21/R21 independenlly wilhoul connecling 10 Ihe MELSECNET link:
(1) Set the mode selection switch to "2" (offline).
If the link module is used without setting the mode to "offline," the "LINK PARAMETER
ERROR"
occurs.
Sequence program operation can be continued correctly even If the link
parameter error occurs.
I
(2) ON/OFF slalus of link slalus Indicaling LEOs is nol known
n
Ihe link cable (coaxial cable,
fiber-optic cable) is not connected to the link module.
To check whether the link module is correct or faulty, execute the self-Ioopback test as in
II
Section 4.10.4.
4-92

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