: Compatible, : Partial change required, ×: Incompatible
*1 Standby station is a station type of simple dual-structured system.
Only the following CPU modules support the simple dual-structured system.
• High Performance model QCPU
• Process CPU Parameter
name
Description
Compat-ibility Precautions for replacement QnA/QnAS series
MELSECNET/10 module
Q series MELSECNET/H module (MELSECNET/10 mode)
Network parameter
Network type Network type
Starting I/O No. Starting I/O No.
Network No. Network No.
- Group No. Set the group No. in GX Developer
network parameters.
- Mode Set the mode in GX Developer
network parameters.
Standby station compatible module
Standby station compatible module
Routing parameters Routing parameters Valid module during other
station access
Valid module during other station access
REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)
4
4.6.1 Comparison of link special relay (SB)/link special register (SW)
The table below shows only link special relay (SB) and link special register (SW) to be used in interlock program.
Device name and device No. of MELSECNET/H module are described in link device of internal MELSECNET/H module.
Changing sequence program should be performed after checking the refreshed device of link device in refresh parameters.
(1) AnN/AnA/AnSCPU (excluding AnUS(H)CPU)
When MELSECNET/10 module is mounted to the CPU module of the AnN/AnA/AnSCPU (excluding AnUS(H)CPU), link special relay (SB) and link special register (SW) are assigned to special relay and special register of CPU module.
For replacing with a MELSECNET/H module, change sequence program in reference to the following.
(a) Link special relay (SB)
: Compatible, : Partial change required, ×: Incompatible
(To next page)
4.6 Program Comparisons
AnN/AnA/AnSCPU MELSECNET/10 module
QCPU
MELSECNET/H module
Compat-ibility Precautions for replacement
Number Name Description Number Name Description
M9204 LRDP instruction complete
OFF : Not completed
ON : Completed - -
-LRDP instruction cannot be used.
When using it in sequence program, delete corresponding part.
M9205 LWTP instruction complete
OFF : Not completed
ON : Completed - -
-LWTP instruction cannot be used.
When using it in sequence program, delete corresponding part.
M9211 Module status OFF : Normal
ON : Abnormal SB0020 Module status OFF : Normal ON : Abnormal
M9240 Online host status
OFF : Online ON : Offline,
self-loopback test, station-to-station test
SB0043 Online switch (host station)
OFF : Online ON : Other than
online
M9241 Forward loop status
OFF : Normal
ON : Abnormal SB0090 Host loop status OFF : Normal ON : Abnormal
When SB0090 turns on, check the loop condition with SW0090, or check by host bit of SW0091 to SW0094.
M9242 Reverse loop status
OFF : Normal
ON : Abnormal SB0090 Host loop status OFF : Normal ON : Abnormal
When SB0090 turns on, check the loop condition with SW0090, or check by host bit of SW0095 to SW0098.
M9243 Loopback status
OFF : Loopback inexecution ON : Loopback
execution
SB0090 Host loop status OFF : Normal ON : Abnormal
When SB0090 turns on, check the loop condition with SW0090, or check by SW0099 or SW009A.
M9246
Data not received (Control station)
OFF : Received
ON : Not received - -
-When using it in sequence program, delete corresponding part.
M9250 Parameter unreceived
OFF : Received
ON : Not received SB0054 Parameter receive status
OFF : Receive completed ON : Unreceived M9251 Communication
status
OFF : Normal
ON : Abnormal SB0049 Host data link status
OFF : Normal ON : Abnormal
REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)
4
: Compatible, : Partial change required, ×: Incompatible
(b) Link special register (SW)
: Compatible, : Partial change required, ×: Incompatible AnN/AnA/AnSCPU
MELSECNET/10 module
QCPU
MELSECNET/H module
Compat-ibility Precautions for replacement
Number Name Description Number Name Description
M9252 Loop test status
OFF : Not being executed ON : Forward loop
test/reverse loop test execution underway
SB00AE
Offline testing response designation
OFF : No response ON : Response
M9253 Control station operation status
OFF : RUN or STEP RUN ON : STOP or
PAUSE
SW0084 to SW0087
Each station CPU RUN status
Stores the CPU RUN status of each station.
(Including the host)
M9254 Other station operation status
OFF : All stations are in the RUN or STEP RUN status ON : Any station in
the STOP or PAUSE status exist
SB0084
Each station CPU RUN status
OFF : All stations are in the RUN or STEP RUN status ON : Station in the
STOP or PAUSE status exist (including the host)
M9255
Other station communication status
OFF : All stations normal ON : Any error
station identified
SB0074 Cyclic transmission status of each station
OFF : All stations are executing data linking ON : Stations that
are not executing data linking exist
AnN/AnA/AnSCPU MELSECNET/10 module
QCPU
MELSECNET/H module
Compat-ibility Precautions for replacement
Number Name Description Number Name Description
D9243 Host station number
Stores the station
number of the host. SW0042 Station No. Stores the station number of the host.
D9244 Maximum station No.
Stores the maximum station No. set in network parameters.
SW0059 Total number of link stations
Stores the total number of link stations set in network parameters.
D9245 Communication error count
Accumulates and stores the communication error times.
SW00B8 to SW00C7
Error counters
Accumulates and stores the various error time.
The error count for each error cause is stored.
D9248 to D9251
Other station CPU RUN status
Stores the CPU RUN status of other station.
SW0084 to SW0087
Each station CPU RUN status
Stores the RUN status of each station.
(Including the host) D9252
to D9255
Data link status of other station
Stores the data link status of other station.
SW0074 to SW0077
Cyclic transmission status of each station
Stores the cyclic transmission status of each station.
REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)
4
(2) AnU/AnUS(H)/QnA/QnASCPU
The following device name and device No. are described in link device of internal MELSECNET/10 or MELSECNET/H module.
Changing sequence program should be performed after checking the refreshed device of link device in refresh parameters.
(a) Link special relay (SB)
: Compatible, : Partial change required, ×: Incompatible
(b) Link special register (SW)
: Compatible, : Partial change required, ×: Incompatible
Remarks
For link special relay (SB) and link special register (SW) that are not described in this section, refer to each manual.
Item
Number
Compat-ibility
Precautions for replacement AnU/AnUS(H)/QnA/
QnASCPU MELSECNET/10 module
QCPU MELSECNET/H module
Module status SB0020 SB0020
Baton pass status (host) SB0047 SB0047
Data link status of each
station SB0049 SB0049
Baton pass status of each
station SB0070 SB0070
Cyclic transmission status of
each station SB0074 SB0074
Item
Number
Compat-ibility
Precautions for replacement AnU/AnUS(H)/QnA/
QnASCPU MELSECNET/10 module
QCPU MELSECNET/H module Baton pass status of each
station SW0070 to SW0073 SW0070 to SW0073
Cyclic transmission status of
each station SW0074 to SW0077 SW0074 to SW0077
REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)
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4.6.2 Comparison of dedicated instructions (1) A/AnSCPU
: Compatible, : Partial change required, ×: Incompatible