Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 164 / 478

4 Using Protocol Macros
4-28
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
z
Status Area Descriptions
Name
Device vari-
able for CJ-
series Unit
Meaning
Timing
Initialize Set Reset
Error Log
EEPROM
Error *_Com_UnitLog
MemErr 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. Controller
reset (*) At error When power
is cycled
Protocol Data
Error *_Com_UnitPm
rDatErr 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.
At error When the
error is
cleared after
protocol data
is resent
System
Setup error *_P1_SysSetup
Err
*_P2_SysSetup
Err 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. At error Controller
reset (*)
Port Operat-
ing Status *_P1_Operating
Sta
*_P2_Operating
Sta This variable changes to TRUE when the
port can operate correctly.
It changes to FALSE when protocol macro
data is being transferred.
At error After proto-
col data is
transferred
Remote Unit
Busy *_P1_RmtBusy
Sta
*_P2_RmtBusy
Sta 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.)
When status
is read After busy
status is
released