Mitsubishi Electric Melsec A Series - 2.5 Parameter Comparisons; 2.5.1 Parameter comparisons

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REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
2
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.
: Compatible, : Partial change required, × : Incompatible
*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.)
2.5 Parameter Comparisons
MELSECNET ( II ) MELSECNET/H
Optical loop
Optical loop
MELSECNET ( II ) MELSECNET/H
Compat-
ibility
Precautions for replacement
Master station
Network type
Control station
Network type
Starting I/O No.
*1
Starting I/O No.
- (No setting) Network No. Mandatory for the MELSECNET/H.
Total number of (slave) stations Total number of (slave) stations
The total number of stations is 64 at
maximum.
- (No setting) Group No. Mandatory for the MELSECNET/H.
Network range assignments
LB/LW assignments (first half,
second half) on the master station
and local stations
Network range assignments
LX/LY assignments on the control
station and normal stations
Station inherent parameter
*2
Supplemental settings-Secured data
send
Supplemental settings-Secured data
receive
*3
LX/LY assignments on the master
station and local stations
LX/LY assignments on the control
station and normal stations
I/O master station specification Mandatory on communications of LX/LY
Refresh parameters
*1
Refresh parameters
Local station
Network type
*1
Normal station
Network type
Starting I/O No.
*1
Starting I/O No.
- (No setting)
Network No. Mandatory for the MELSECNET/H.
Group No. Mandatory for the MELSECNET/H.
Station inherent parameter
*2
Refresh parameters
*1
Refresh parameters
L3L1
M
L2
Network 1
1N
S31NS1
1M
P4
1N
S2