601
Auxiliary Area Appendix C
A215 A21500
to
A21507
First Cycle
Flags after
Network Com-
munications
Error
Each flag will turn ON for just one cycle after a com-
munications error occurs. Bits 00 to 07 correspond to
ports 0 to 7. Use the Used Communications Port
Number stored in A218 to determine which flag to
access. Determine the cause of the error according
to the Communications Port Completion Codes
stored in A203 to A210.
1: First cycle after communications error only
0: Other status
Note: These flags are not effective until the next
cycle after the communications instruction is exe-
cuted. Delay accessing them for at least one cycle.
Retained Cleared ---
A216 to
A217
All Network Com-
munications
Completion
Code Storage
Address
The completion code for a communications instruc-
tion is automatically stored at the address with the
I/O memory address given in these words. Place this
address into an index register and use indirect
addressing through the index register to read the
communications completion code.
Retained Cleared ---
A218 All Used Commu-
nications Port
Numbers
Stores the communications port numbers used when
a communications instruction is executed using auto-
matic communication port allocations.
0000 to 0007 hex: Communications port 0 to 7
Retained Cleared ---
A219 A21900
to
A21907
Communica-
tions Port
Error Flags
ON when an error occurred during execution of a net-
work instruction (SEND, RECV, CMND, or PMCR).
Bits 00 to 07 correspond to communications ports 0
to 7.
1: Error occurred
0: Normal condition
(When the simple backup operation is used to per-
formed a write or compare operation for a Memory
Card on a CJ1-H or CJ1M CPU Unit, a communica-
tions port will be automatically allocated, and the
corresponding Flag will be turned OFF if an error
occurs.)
Retained --- ---
A220 to
A259
A22000
to
25915
Basic I/O Unit
Input
Response
Times
These words contain the actual input response
times.
0 to 17 hexadecimal
When the Basic I/O Unit input response time setting
is changed in the PLC Setup while the PLC is in
PROGRAM mode, the setting in the PLC Setup will
not match the actual value in the Basic I/O Unit
unless the power is turned OFF and then ON again.
In that case, the actual value can be monitored in
these words.
Retained See
function
column.
PLC Setup (Basic I/O
Unit Input response
time settings)
A260 All I/O Allocation
Status
Indicates the current status of I/O allocation, i.e.,
Automatic I/O Allocation at Startup or User-set I/O
Allocations.
0000 hex: Automatic I/O Allocation at Startup
BBBB hex: User-set I/O Allocations
Retained Retained ---
Address Name Function Status
after
mode
change
Status
at star-
tup
Write timing/
Related flags,
settings
Words Bits
To Next Page
Loading...
