14-35
14 Serial Communications
CP2E CPU Unit Software User’s Manual(W614)
14-5 Serial PLC Links
14
14-5-4 Operating Specifications
Serial Port 2/Built-in RS-485 Port
Name Address Details Read/write Refresh timing
Serial Port 2/
Built-in RS-485 Port
Communicating
with Polled Unit
Flags*
A394.00 to
A394.07
When the serial port 2 or built-in
RS-485 port is being used in NT
link mode, the bit corresponding to
the Unit performing communica-
tions will be ON. Bits 00 to 07 corre-
spond to unit numbers 0 to 7,
respectively.
ON: Communicating
OFF: Not communicating
Read • Cleared when power is turned ON.
• Turns ON the bit corresponding to the unit number
of the Polled Unit that is communicating via the
serial port 2 or built-in RS-485 port in NT link mode
or Serial PLC Link mode.
• Bits 00 to 07 correspond to unit numbers 0 to 7,
respectively.
Serial Port 2/
Built-in RS-485 Port
Restart Flags
A526.01 Turn ON this bit to restart the serial
port 2 or built-in RS-485 port.
Read/write • Cleared when power is turned ON.
• Turn ON to restart the serial port 2 or built-in RS-
485 port.
Note The bit is automatically turned OFF by the
system when restart processing has been
completed.
Serial Port 2/
Built-in RS-485 Port
Error Flags
A528.08 to
A528.15
When an error occurs at the serial
port 2 or built-in RS-485 port, the
corresponding
error bit is turned ON.
Bit 8: Not used.
Bit 9: Not used.
Bit 10: Parity error
Bit 11: Framing error
Bit 12: Overrun error
Bit 13: Timeout error
Bit 14: Not used.
Bit 15: Not used.
Read/Write • Cleared when power is turned ON.
• When an error occurs at the serial port 2 or built-in
RS-485 port, the corresponding error bit is turned
ON.
• The flag is automatically turned OFF by the system
when the serial port 2 or built-in RS-485 port is
restarted.
• In NT link mode, only bit 13 (t
imeout error) is
en
abled.
• In Serial PLC Link mode, only the following bits are
enabled.
Errors at the Polling Unit:
Bit 13: Timeout error
Errors at Polled Units:
Bit 12: Overrun error
Bit 11: Framing error
Bit 10: Parity error
Note If the error occurred in Serial PLC link mode,
the console will retry before communication
establish. Rehabilitation of the communica-
tions is no need for port restart. If user elimi-
nates error, the communication will
automatically establish between console and
servo.
However, error flag will be saved as the
record. If you want to clear the error flag,
please restart port.
To Next Page
Loading...
Need help?
General
