Special Registers (Sp.d) - Mitsubishi Electric A173UHCPU Programming Manual

APPENDICES
3.2

Special Registers (SP.D)

Number Name
D9000 Fuse blown
I/O unit verify
D9002
error
D9004
MINI link error
(Note-1)
D9005 AC DOWN
(Note-4) counter
D9008 Self-diagnostic
(Note-4) error
Annunciator
D9009
detection
D9010 Error step
D9011 Error step
D9014 I/O control mode I/O control mode number
The special registers are data registers used for specific purposes in the
programmable controller. Therefore, do not write data to the special registers in the
program (with the exception of those whose numbers are marked
table).
Of the special relays, those from D9180 to D9199 are used for positioning control.
Table 3.2 Special Register List
Stored Data
Number of module with blown fuse
I/O module verification error
module number
Parameter-set (1 to 8 modules)
states are stored.
AC DOWN occurrence count
Self-diagnostic error number
F number at which external failure
has occurred
Step number at which operation
error has occurred
Step number at which operation
error has occurred
! When modules with a blown fuse are detected, the lowest I/O number of the
detected modules is stored in hexadecimal in this special relay.
(Example: Blown fuses at the output modules Y50 to 6F... "50" is stored in
hexadecimal.)
For monitoring at a peripheral device, use hexadecimal display monitor
operations.
(Cleared when the contents of D9100 are all "0".)
!
If I/O modules that do not match the registered data are detected when the power
is turned on, the first I/O number of the lowest module number among the
detected modules is stored in hexadecimal (the storage method is the same as for
D9000). When monitoring with a peripheral device, use a hexadecimal display
monitoring operation.
(Cleared when all contents of D9116 to D9123 are reset to zero.)
! Stores the MINI(S3) link error detection states of the loaded master modules.
b15
8th 7th 6th 5th 4th 3rd 2nd 1st
The bit corresponding to the master
module which cannot make data
communication with the PLC CPU
turns ON.
! 1 is added to the stored value each time the input voltage becomes 80% or less of
the rating while the CPU module is performing an operation, and the value is
stored in BIN code.
!
1 is added to the stored value when an error is found as a result of self-diagnosis,
the error number, and the value is stored in BIN code.
! When one of F0 to 2047 is turned on by OUT F or SET F , the F number
detected earliest among the F numbers which have been turned on is stored in
BIN code.
!
D9009 can be cleared by executing a RST F or LEDR instruction. If another F
number has been detected, the clearing of D9009 causes the next number to be
stored in D9009.
!
If access to the module which has been set as a special module could not be
made at a STOP→RUN time, the module No. of the special module is stored.
!
When an operation error occurs during execution of an application instruction, the
step No. where the error occurred is stored in BIN cod, and thereafter, every time
an operation error occurs the contents of D9010 are updated.
!
When an operation error occurs during execution of an application instruction, the
step number at which the error occurs is stored in this register in BIN code. Since
storage is executed when M9011 changes from OFF to ON, the contents of D9011
cannot be updated unless it is cleared by the user program.
!
The set control mode is represented as follows:
3: I/O in refresh mode
APP − 43
(Note-2)
Explanation
b8 b7
8th 7th 6th 5th 4th 3rd 2nd 1st
The corresponding bit turns ON
when any of the following signals of
the master module turns ON.
Hardware fault (X0/X20)
MINI(S3) link error detection
(X6/X26)
MINI(S3) link communication error
(X7/X27)
in the
b0