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If there are words allocated for n errors and n errors occur, the next error will be
written into the last position, n, the contents of previous error will be moved to
record n–1, and so on until the contents of record 1 is moved off the end and lost,
i.e., the area functions like a shift register that moves data in units of error re-
cords (5 words). The Record Pointer will remain set to n (binary).
The Error Log Area can be reset by turning ON bit A00014 (Error Log Reset Bit).
When this is done, the Record Pointer will be reset to 0000, the Error Log Area
will be cleared, and any further error codes will be recorded from the beginning of
the Error Log Area.
3-6-14 MACRO Input/Output Areas
When MCRO(156) is executed, the contents of the four source words are copied
to the MACRO input area (A200 through A203) and these input arguments are
passed to the specified subroutine.
When the subroutine is completed, the results of the subroutine are copied to the
MACRO output area (A204 through A207) and these results are passed to the
four destination words.
3-6-15 CPU Bus Unit Initializing Flags
Bits A30200 through A30215 turn ON while the corresponding CPU Bus Units
(Units #0 through #15, respectively) are initializing.
3-6-16 Wait Flags
Bit A30600 is ON when the start input terminals are open.
Bit A30601 is ON when the PC is not running because an I/O Verification Error
has occurred.
Bit A30602 is ON when the PC is not running because there is a terminator mis-
sing in the SYSMAC BUS System.
Bit A30603 is ON when the PC is not running because a CPU Bus Unit is initializ-
ing.
Bit A39115 is turned ON during duplex initialization processing. For details of
duplex initialization, refer to 6-2-2 Duplex Initialization.
3-6-17 Duplex Startup Error Flags
Bit A30604 is ON when a duplex bus error occurs at the start of duplex operation
after power is turned on. (Startup mode set to RUN or MONITOR.)
Bit A30605 is ON when a duplex verification error occurs at the start of duplex
operation after power is turned on. (Startup mode set to RUN or MONITOR.)
Bit A30606 is ON when the other CPU is not operating at the start of duplex op-
eration after power is turned on. (Startup mode set to RUN or MONITOR.)
3-6-18 Programming Device Flags
Bit A30615 is ON when a Programming Device is connected to the CPU, the Ex-
pansion CPU, or an Expansion I/O Rack.
Bits A30700 through A30815 are turned ON when a Programming Device is
connected to the corresponding Slave Rack, as shown in the following table.
Start-up Wait Flag (A30600)
I/O Verification Error Wait
Flag (A30601)
SYSMAC BUS Terminator
Wait Flag (A30602)
CPU Bus Unit Initializing
Wait Flag (A30603)
Duplex Initializing Wait Flag
(A39115)
Duplex Bus Error At Startup
Flag (A30604)
Duplex Verification Error At
Startup Flag (A30605)
Alternate CPU Waiting At
Startup Flag (A30606)
Programming Device
Connected Flag (A30615)
SYSMAC BUS/2
Programming Device Flags
(A307 and A308)
Auxiliary Area
Section 3-6
Summary of Contents for CVM1D
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