Parameter Comparisons - Mitsubishi Electric MELSEC-A Series Manual

2
REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)

2.5 Parameter Comparisons

2.5.1 Parameter comparisons

The network parameters of MELSECNET (II) are deleted when the programmable controller type is
changed with the GX Developer. After changing the programmable controller type, set the
MELSECNET/H network parameters again.
(1) Replacing MELSECNET (II) with MELSECNET/H
The following shows a comparison between MELSECNET (II) network parameter settings and
MELSECNET/H network parameter settings.
The MELSECNET (II) master station settings are compared with the MELSECNET/H control station
settings, and the MELSECNET (II) local station setting are compared with the MELSECNET/H normal
station settings.
Optical loop
MELSECNET ( II )
Network type
*1
Starting I/O No.
- (No setting)
Total number of (slave) stations
- (No setting)
LB/LW assignments (first half,
second half) on the master station
and local stations
LX/LY assignments on the master
station and local stations
Refresh parameters
*1
Network type
*1
Starting I/O No.
- (No setting)
Refresh parameters
*1 This is set when the AnU/AnUS(H)/QnA/QnASCPU is mounted.
*2 Applied when LB/LW are set for both the first half/second half on MELSECNET (II). (For details, refer to Section 2.5.2
Example of changing parameters on 2-tier system.)
*3 This is the data separation prevention function for reading/writing cyclic data of two words or more in a single operation.
(For details, refer to Section 2.7 Replacement Precautions.)
MELSECNET ( II )
M
L1 L3
L2
Network type
Starting I/O No.
Network No.
Total number of (slave) stations
Group No.
LX/LY assignments on the control
station and normal stations
Station inherent parameter
Supplemental settings-Secured data
send
Supplemental settings-Secured data
receive
LX/LY assignments on the control
station and normal stations
I/O master station specification
*1
Refresh parameters
Network type
Starting I/O No.
Network No.
Group No.
Station inherent parameter
*1
Refresh parameters
Optical loop
1N
: Compatible,
Compat-
MELSECNET/H
ibility
MELSECNET/H
1M 4
P
Network 1 1N
1 3
S S
1N 2
S
: Partial change required, × : Incompatible
Precautions for replacement
Mandatory for the MELSECNET/H.
The total number of stations is 64 at
maximum.
Mandatory for the MELSECNET/H.
*2
*3
Mandatory on communications of LX/LY
Mandatory for the MELSECNET/H.
Mandatory for the MELSECNET/H.
*2
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