App - 54 App - 54
MELSEC-Q
APPENDICES
Special Register List (Continue)
ACPU
Special
Conversion
Special
Register after
Conversion
Special
Register for
Modification
Name
Meaning
Details
Corresponding
CPU
D9232
SD1232
Stores conditions
for up to numbers
1 to 8
D9233
SD1233
Stores conditions
for up to numbers
9 to 16
D9234
SD1234
Stores conditions
for up to numbers
17 to 24
D9235
SD1235
Stores conditions
for up to numbers
25 to 32
D9236
SD1236
Stores conditions
for up to numbers
33 to 40
D9237
SD1237
Stores conditions
for up to numbers
41 to 48
D9238
SD1238
Stores conditions
for up to numbers
49 to 56
D9239
SD1239
Local station and
remote I/O station
loop error
Stores conditions
for up to numbers
57 to 64
Stores the local or remote station number at which a
forward or reverse loop error has occurred
SD1232
b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
L/R8
L/R7
L/R6
L/R5
L/R4
L/R3
L/R2
L/R1
SD1233
L/R16
L/R15
L/R14
L/R13
L/R12
L/R11
L/R10
L/R9
SD1234
L/R24
L/R23
L/R22
L/R21
L/R20
L/R19
L/R18
L/R17
SD1235
L/R32
L/R31
L/R30
L/R29
L/R28
L/R27
L/R26
L/R25
SD1236
L/R40
L/R39
L/R38
L/R37
L/R36
L/R35
L/R34
L/R33
SD1237
L/R48
L/R47
L/R46
L/R45
L/R44
L/R43
L/R42
L/R41
SD1238
L/R56
L/R55
L/R54
L/R53
L/R52
L/R51
L/R50
L/R49
SD1239
L/R64
L/R63
L/R62
L/R61
L/R60
L/R59
L/R58
L/R57
Bit
Device
number
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
R
F
In the above table, "F" indicates a forward loop line and
"R" a reverse loop line .The bit corresponding to the
station number at which the forward or reverse loop error
has occurred, becomes "1".
Example: When the forward loop line of station 5 has an
error, bit 8 of SD1232 become "1", and when
SD1232 is monitored, its value is "256 (100H)".
D9240
SD1240
Number of times
communications
errors detected
Stores
cumulative total
of receive errors
Stores the number of times the following transmission
errors have been detected:
CRC, OVER, AB. IF
Count is made to a maximum of FFFFH. RESET to return
the count to 0.
D9241
SD1241
Stores conditions
for up to numbers
33 to 48
D9242
SD1242
Local station link
type
Stores conditions
for up to numbers
49 to 64
Stores whether the slave station corresponds to
MELSECNET or MELSECNET11.
• Bits corresponding to the MELSECNET 11 stations
become "1."
• Bits corresponding to the MELSECNET stations or
unconnected become "0."
SD1202
SD1203
SD1241
SD1242
b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
L16 L15 L14 L13 L12 L11
L32 L31 L30 L29 L28 L27
L48 L47 L46 L45 L44 L43
L64 L63 L62 L61 L60 L59
L26
L42
L58
L25
L41
L57
L24
L40
L56
L23
L39
L55
L22
L38
L54
L21
L37
L53
L20
L36
L52
L19
L35
L51
L18
L34
L50
L17
L33
L49
L10 L9
L8
L7
L6
L5
L4
L3
L2
L1
Bit
Device
number
• 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 own (master) station goes down, the contents
before going down are also retained.
D9243
SD1243
Station number
information for host
station
Stores station
number (0 to 64)
Allows a local station to confirm its own station number
D9244
SD1244
Number of link
device stations
Stores number of
slave stations
Indicates the number of slave stations in one loop.
D9245
SD1245
Number of times
communications
errors detected
Stores
cumulative total
of receive errors
Stores the number of times the following transmission
errors have been detected: CRC, OVER, AB. IF
Count is made to a maximum of FFFF
H
. RESET to return
the count to 0.
QnA
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