Appendix 2 Buffer Memory Areas - Mitsubishi Electric MELSEC-Q Series User Manual

Appendix 2
This appendix describes buffer memory areas.
(1) Parameter information area
This area stores parameter settings.
Do not write data in this area. Doing so may cause an error.
Address
Hexadecimal Decimal
0
0
H
1
1
H
2
2
H
3
3
H
4
4
H
5
5
H
6
6
H
7
7
H
8
8
H
10 to 13
16 to 19
H H
14 to 17
20 to 23
H H
328
Buffer Memory Areas
Item
(Use prohibited)
The number of slave stations (including a reserved station) connected to the master
Total number of station is stored.
connected stations Default: 64 (stations)
Range: 1 to 64 (station)
The number of retries to a station where a communication failure has occurred is
stored.
Number of retries
Default: 3 (times)
Range: 1 to 7 (time)
The number of slave stations that return to system operation by one link scan is
Number of automatic stored.
return stations Default: 1 (station)
Range: 1 to 10 (station)
The standby master station number is stored.
Standby master
Default: 0 (0: no standby master station specified)
station specification
Range: 0 to 64 (0: no standby master station specified)
(Use prohibited)
The specified data link status if a programmable controller CPU error occurs in the
Operation mater station is stored.
specification when Default: 0 (Stop)
CPU is down Range: 0 (Stop)
Whether to synchronize a link scan with a sequence scan is stored.
Default: 0 (Asynchronous)
Scan mode setting
Range: 0 (Asynchronous)
Delay time setting Delay time is stored. (Set 0.)
Reserved station specification status is stored.
Reserved station
Default: 0 (Not set)
specification
Range: The bit corresponding to the station number turns on.
Error invalid station specification status is stored.
Error invalid station
Default: 0 (Not set)
specification
Range: The bit corresponding to the station number turns on.
Description
1 (Continued)
1 (Synchronous)
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