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88
Allocation of Word and Bit Addresses
Section 4-1
4-1-2
I/O Memory Area Attributes
Note
1.
The PC Setup setting in DM 6601 bits 08 to 11 determines whether the
IOM Hold Bit is reset (turned OFF) at startup.
2.
Timer PVs and Completion Flags are maintained when the CPM2C-S is
switched to PROGRAM mode from RUN mode or MONITOR mode, but
cleared when the CPM2C-S is switched from PROGRAM mode to RUN
mode or MONITOR mode.
Area
Exter-
nal I/O
alloca-
tion
Mode change
(to or from
PROGRAM)
Fatal error
Startup (Power ON)
Force
Set,
Force
Reset
FALS(07)
Other cause
Reset IOM
Hold Bit
1
Maintain IOM
Hold Bit
1
IOM
Hold
Bit
OFF
IOM
Hold
Bit
ON
IOM
Hold
Bit
OFF
IOM
Hold
Bit
ON
IOM
Hold
Bit
OFF
IOM
Hold
Bit
ON
IOM
Hold
Bit
OFF
IOM
Hold
Bit
ON
IOM
Hold
Bit
OFF
IOM
Hold
Bit
ON
Input area
(IR 000 to IR 009)
Yes
Clear
Hold
Hold
Hold
Clear
Hold
Clear
Clear
Clear
Hold
OK
Output area
(IR 010 to IR 019)
Yes
Clear
Hold
Hold
Hold
Clear
Hold
Clear
Clear
Clear
Hold
OK
CompoBus/S input area
(IR 020 to IR 027)
No
Clear
Hold
Hold
Hold
Clear
Hold
Clear
Clear
Clear
Hold
OK
CompoBus/S output area
(IR 030 to IR 037)
No
Clear
Hold
Hold
Hold
Clear
Hold
Clear
Clear
Clear
Hold
OK
Work areas
(IR 028, IR 029,
IR 030 to IR 049,
IR 220 to IR 227)
No
Clear
Hold
Hold
Hold
Clear
Hold
Clear
Clear
Clear
Hold
OK
SR area
(SR 228 to SR 255)
No
HR area
(HR 00 to HR 19)
No
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
OK
AR area
(AR 00 to AR 23)
No
OK
LR area
(LR 00 to LR 15)
No
Clear
Hold
Hold
Hold
Clear
Hold
Clear
Clear
Clear
Hold
OK
Timer Completion Flags
(T000 to T255)
No
Hold
2
Hold
2
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
OK
Timer PVs
(T000 to T255)
No
Hold
2
Hold
2
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
No
Counter Completion
Flags (C000 to C255)
No
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
OK
Counter PVs
(C000 to C255)
No
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
No
DM area
No
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
Hold
No
Read/Write
(DM 0000 to DM 1999,
DM 2022 to DM 2047)
Error Log
(DM 2000 to DM 2021)
Read-only
(DM 6144 to DM 6599)
PC Setup
(DM 6600 to DM 6655)
Содержание CPM2C-S100C
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