Details Of Buffer Memory Addresses - Mitsubishi Electric MELSEC iQ-R Series User Manual

Details of buffer memory addresses

This appendix describes buffer memory areas.
Parameter information area
This area stores parameter settings.
Do not write data in this area. Doing so may cause an error.
Address
Hexadecimal Decimal
0H 0
1H 1
2H 2
3H 3
4H 4
5H 5
6H 6
7H 7
8H to FH 8 to 15
10H to 13H 16 to 19
14H to 17H 20 to 23
18H to 1FH 24 to 31
Item Description

(Use prohibited)
Total number of Stores the number of slave stations (including a reserved station) connected to the
connected stations master station.
Default: 64 (stations)
Range: 1 to 64 (station)
Number of retries Stores the number of retries to a station where a communication failure has occurred.
Default: 3 (times)
Range: 1 to 7 (time)
Number of automatic Stores the number of slave stations that return to system operation by one link scan.
return stations Default: 1 (time)
Range: 1 to 10 (time)
Standby master Stores the standby master station number.
station specification Default: 0 (0: no standby master station specified)
Range: 0 to 64 (0: no standby master station specified, 1 to 64: station number of the
corresponding station)

(Use prohibited)
Data link setting at Stores the specified data link status if a programmable controller CPU error occurs in the
CPU failure mater station.
Default: 0 (Data link stopped)
Range: 0 (Data link stopped), 1 (Data link continued)
Scan mode setting Stores whether to synchronize a link scan with a sequence scan.
Default: 0 (Asynchronous with a sequence scan)
Range: 0 (Asynchronous with a sequence scan), 1 (Synchronous with a sequence scan)
(Use prohibited) 
Reserved station Stores the reserved station specification status. Only the bit corresponding to the start
setting station number turns on.
Default: 0 (Not set)
Range: The bit corresponding to the station number turns on.
10H (16)
11H (17)
12H (18)
13H (19)
Error invalid station Stores the error invalid station specification status. Only the bit corresponding to the start
setting station number turns on.
Default: 0 (Not set)
Range: The bit corresponding to the station number turns on.
14H (20)
15H (21)
16H (22)
17H (23)

(Use prohibited)
b15 b14 b13 b12 to
16 15 14 13 to
32 31 30 29 to
48 47 46 45 to
64 63 62 61 to
1 to 64 in the table indicate station numbers.
b15 b14 b13 b12 to
to
16 15 14 13
32 31 30 29 to
48 47 46 45 to
62 61 to
64 63
1 to 64 in the table indicate station numbers.
b3 b2 b1 b0
4 3 2 1
20 19 18 17
36 35 34 33
52 51 50 49
b3 b2 b1 b0
1
4 3 2
20 19 18 17
36 35 34 33
52 51 50 49
APPX
Appendix 3 Buffer Memory
A
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