Omron CJ1W-SCU32 Operation Manual page 164

4 Using Protocol Macros
Status Area Descriptions
Device vari-
Name able for CJ-
series Unit
Error Log *_Com_UnitLog
EEPROM MemErr
Error
Protocol Data *_Com_UnitPm
Error rDatErr
System *_P1_SysSetup
Setup error Err
*_P2_SysSetup
Err
Port Operat- *_P1_Operating
ing Status Sta
*_P2_Operating
Sta
Remote Unit *_P1_RmtBusy
Busy Sta
*_P2_RmtBusy
Sta
4-28
Meaning
If a write to EEPROM fails for the error log,
it is assumed the EEPROM is beyond its
service life and this flag changes to TRUE.
At the same time, the ERC indicator will
also light. Although this has no effect on
communications and other functions,
replace the Unit promptly for ease of main-
tenance.
This variable changes to TRUE if an error
is detected in the protocol data checksum
when the Controller is reset.
At the same time, RDY and ERC indica-
tors will flash. This error may occur if the
communications connector becomes dis-
connected or the CPU Unit power is
turned OFF during protocol data transfer.
Use the CX-Protocol to transfer protocol
data again.
This variable changes to TRUE if a Sys-
tem Setup error occurs. After changing the
System Settings, reset or restart the Con-
troller, or restart the port.
This variable changes to TRUE when the
port can operate correctly.
It changes to FALSE when protocol macro
data is being transferred.
This variable indicates the receive status
of a Remote Unit when Xon/Xoff flow con-
trol or RS/CS flow control is set in the
transmission control parameters. When
Xon/Xoff flow control is set, the reception
buffer is cleared when the sequence
starts, so the status area is set to Remote
Unit ready to receive (FALSE)
TRUE: Remote Unit busy (Reception is
disabled because the reception buffer is
full.)
FALSE: Remote Unit ready to receive
(Reception is enabled.)
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Timing
Initialize Set
Controller At error
reset (*)
At error
At error
At error
When status
is read
Reset
When power
is cycled
When the
error is
cleared after
protocol data
is resent
Controller
reset (*)
After proto-
col data is
transferred
After busy
status is
released