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Appendix E
Auxiliary Area Data
The following table and descriptions cover the words and bits in the Auxiliary Area of PC memory that are related to
the Ethernet Unit.
Read-only Bits/Words
Word(s)
Bit(s)
Name
Function
Settings
A202
A20200 to
A20207
Communications
Port Enabled Flags
Bits A20200 to A20207 turn ON when a network
instruction (SEND, RECV, CMND, or PMCR) can
be executed with the corresponding port number.
Bits 00 to 07 correspond to communications ports
0 to 7.
0: Network
communications
running
1: No network
communications
running
A203 to
A210
---
Communications
Port Completion
Codes
These words contain the completion codes for the
corresponding port numbers when network
instructions (SEND, RECV, CMND, or PMCR) have
been executed. Words A203 to A210 correspond to
communications ports 0 to 7.
0000: No error
Not 0000: Error code
A219
A21900 to
A21907
Communications
Port Error Flags
Bits A21900 to A21907 turn ON when an error
occurred during execution of a network instruction
(SEND, RECV, CMND, or PMCR). Bits 00 to 07
correspond to communications ports 0 to 7.
0: Normal end
1: Error end
A302
A30200 to
A30215
CPU Bus Unit
Initializing Flags
Bits A30200 through A30215 turn ON while the
corresponding CPU Bus Units (Units #0 through
#15, respectively) are initializing. The bits will turn
ON either when power is turned ON or when a
CPU Bus Unit Restart Bit (A50100 to A50115) is
turned ON.
0: Not initializing
1: Initializing (System
will automatically turn
the flag OFF when
initilization has been
complted.)
A402
A40203
CS1 CPU Bus Unit
Setting Error Flag
(Non-fatal error)
Bit A40203 is turned ON when the CPU Bus Units
actually installed differ from the Units registered in
the I/O table. The ERR/ALM indicator on the front
of the CPU Unit will flash, but CPU operation will
continue.
The unit number of the CPU Bus Unit involved is
stored in word A427.
0: No setting error
1: Setting error
A40207
CS1 CPU Bus Unit
Error Flag
(Non-fatal error)
Bit A40207 is turned ON when an error occurs
during the transmission of data between the CPU
and CPU Bus Units. The ERR/ALM indicator on the
front of the CPU Unit will flash, but CPU operation
will continue. The Unit where the error occurred will
stop.
The unit number of the CPU Bus Unit involved is
stored in word A422.
0: No unit number
error
1: Unit number error
A403
A40300 to
A40308
Memory Error
Location
When a memory error occurs, the Memory Error
Flag (A40115) is turned ON and one of the
following flags is turned ON to indicate the memory
area where the error occurred.
A40300: User program
A40304: PC Setup
A40305: Registered I/O Table
A40307: Routing Table
A40308: CS1 CPU Bus Unit Settings
The ERR/ALM indicator on the front of the CPU
Unit will light and CPU operation will stop.
0: Normal
1: Error