Mitsubishi Q2ACPU User Manual page 498

APPENDICES
(10)Special register list dedicated for QnA
Special
ACPU Special
Register
Special Register for
after
Register Modification
Conversion
D9200 SD1200
D9201 SD1201
D9202 SD1202
D9203 SD1203
D9204 SD1204
Table App. 3.11. Special register
Name Meaning
0 : Normal end
2 : ZNRD
ZNRD instruction
instruction setting fault
processing 3 : Error at
–
result relevant station
(LRDP for 4 : Relevant
ACPU) station ZNRD
execution
disabled
0 : Normal end
2 : ZNWR
ZNWR instruction
instruction setting fault
processing 3 : Error at
–
result relevant station
(LWTP for 4 : Relevant
ACPU) station ZNWR
execution
disabled
Stores conditions for
–
up to numbers 1 to 16
Local station
link type
Stores conditions for
– up to numbers 17 to
32
0 : Forward loop,
during data link
1 : Reverse loop,
during data link
2 : Loopback
implemented in
forward/
reverse
directions
– Link status 3 : Loopback
implemented
only in forward
direction
4 : Loopback
implemented
only in reverse
direction
5 : Data link
disabled
Stores the execution result of the ZNRD (word device read)
instruction
• ZNRD instruction setting faultFaulty setting of the ZNRD instruction
constant, source, and/or destination.
• Corresponding station errorOne of the stations is not
communicating.
• ZNRD cannot be executed in the corresponding station
The specified station is a remote I/O station.
Stores the execution result of the ZNWR (word device write)
instruction.
• ZNWR instruction setting faultFaulty setting of the ZNWR
instruction constant, source, and/or destination.
• Corresponding station errorOne of the stations is not
communicating.
• ZNWR cannot be executed in the corresponding station
The specified station is a remote I/O station.
Stores whether the slave station corresponds to MELSECNET or
MELSECNET II.
• Bits corresponding to the MELSECNET II stations become "1."
• Bits corresponding to the MELSECNET stations or unconnected
become "0."
Device
number
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
SD1202 L16 L15 L14 L13 L12 L11
SD1203 L32 L31 L30 L29 L28 L27
SD1241 L48 L47 L46 L45 L44 L43
SD1242 L64 L63 L62 L61 L60 L59
• If a local station goes down during the operation, the contents
before going down are retained.
Contents of SD1224 to SD1227 and SD1228 to SD1231 are ORed.
If the corresponding bit is "0", the corresponding bit of the special
register above becomes valid.
• If the host (master) station goes down, the contents before going
down are also retained.
Stores the present path status of the data link.
• Data link in forward loop
Master
station Station
No.1
Forward loop
• Data link in reverse loop
Master
station Station
No.1
Forward loop Reverse loop
• Loopback implemented in forward/reverse directions
Master
station Station
No.1
Forward loopback
App - 101
Details
Bit
L10 L9 L8 L7 L6 L5 L4 L3 L2 L1
L26 L25 L24 L23 L22 L21 L20 L19 L18 L17
L42 L41 L40 L39 L38 L37 L36 L35 L34 L33
L58 L57 L56 L55 L54 L53 L52 L51 L50 L49
Station
Station n
No.2
Reverse loop
Station
Station n
No.2
Station Station
Station n
No.2 No.3
Reverse loopback
Corresponding
CPU
QnA
QnA
QnA
QnA
QnA