APPENDICES
APP - 26
MELSEC-
Table 2.2 Special registers list (Continue)
Number Name Description Details Applicable CPU
D9076
Status of writing
to standard ROM
Stores the status of
writing
(enabled/disabled) to
the standard ROM
Stores the status of writing (enabled/disabled) to the
standard ROM.
Statuses of DIP switch 3 and M9073
0: SW3 is OFF, M9073 is OFF/ON
1: SW3 is ON, M9073 is OFF
2: SW3 is ON, M9073 is ON
—
Dedicated to
QCPU-A
(A Mode)
D9077
Sequence
accumulation
time
measurement
Accumulation time
setting
• Stores the accumulation time used by M9077.
Setting range: 1 to 255ms (Default: 5ms)
When the value other than 1 to 255 ms is designated,
the value in D9077 is reset to 0.
—
Dedicated to
QCPU-A
(A Mode)
Stores the number of remaining instructions
(RIRD/RIWT/RISEND/RIRCV) being executable
simultaneously at one scan.
(With QCUP-A or AnUCPU)
Number of remaining instructions being executable = 10
– Number of instructions executed simultaneously
(With AnSHCPU)
Number of remaining instructions being executable = 64
– Number of instructions executed simultaneously
6: This function is available with the CPU of the
following S/W versions or later.
CPU Type Name Software Version
Q02CPU-A, Q02HCPU-A,
Q06HCPU-A
A1SJHCPU, A1SHCPU,
A2SHCPU
Available with all versions
A2UCPU (S1), A3UCPU,
A4UCPU
S/W version Q
(Manufactured in July, 1999)
A2USCPU (S1)
S/W version E
(Manufactured in July, 1999)
A2USHCPU-S1
S/W version L
(Manufactured in July, 1999)
D9080
Number of
executable CC-
Link dedicated
instructions
Stores the number of
remaining CC-Link
dedicated instructions
being executable
Can be used only
with AnU, A2US,
QCPU-A
(A Mode) or
AnSH
6
D9081
Number of
vacant
registration areas
for
communication
requests
0 to 32
• Stores the number of vacant registration areas for
communication requests executed to remote terminal
modules connected to MINI (S3) link module, A2C and
A52G.
—
Usable with AnA,
A2AS, QCPU-A
(A Mode), AnU,
A2C and A52G.
D9082
Final connected
station number
Final connected station
number
• Stores the final station number of remote I/O modules
and remote terminal modules connected to A2C and
A52G.
—
Usable with A2C
and A52G.
D9085 Time check time 1 s to 65535 s
• Sets the time check time of the data link instructions
( ZNRD
, ZNWR ) for the MELSECNET/10.
• Setting range: 1 s to 65535 s (1 to 65535)
• Setting unit: 1 s
• Default value: 10 s (If 0 has been set, default 10 s is
applied)
—
Usable with AnU
and A2AS,
QCPU-A
(A Mode)
D9090
Microcomputer
subroutine input
data area head
device number
Depends on the micro-
computer program
package to be used.
• For details, refer to the manual of each microcomputer
program package.
Unusable with
AnA, A2AS,
QCPU-A (A
Mode) and AnU.
Instruction error
Instruction error detail
number
• Stores the detail code of cause of an instruction error.
—
Usable with AnA,
A2AS, QCPU-A
(A Mode),AnA
board and AnU.
D9091
Microcomputer
subroutine call
error code
Depends on the micro-
computer program
package to be used.
• For details, refer to the manual of each microcomputer
program package.
Unusable with
AnA, A2AS,
QCPU-A
(A Mode),AnA
board and AnU.
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