IDEC OpenNet series User Manual

17: USER COMMUNICATION INSTRUCTIONS
17-28 OPENNET CONTROLLER USER’S MANUAL
Control Signal Statuses in STOP Mode
DSR Input Control Signal Option D8205/D8305
Special data registers D8205 and D8305 are used to control data flow between the OpenNet Controller RS232C port 1 or
port 2 and the remote terminal depending on the DSR (data set ready) signal sent from the remote terminal. The DSR sig-
nal is an input to the OpenNet Controller to determine the status of the remote terminal. The remote terminal informs the
OpenNet Controller using DSR whether the remote terminal is ready for receiving data or is sending valid data.
The DSR control signal option can be used only for the user communication through the RS232C port 1 or port 2.
D8205/D8305 = 0 (system default):
DSR is not used for data flow control. When DSR control is not needed, set 0 to D8205 or D8305.
D8205/D8305 = 1: When DSR is on, the OpenNet Controller can transmit and receive data.
D8205/D8305 = 2: When DSR is off, the
OpenNet Controller can transmit and receive data.
D8205/D8305 = 3: When DSR is on, the
OpenNet Controller can transmit data. This function is usually called “Busy
Control” and is used for controlling transmission to a remote terminal with a slow processing speed,
such as a printer. When the remote terminal is busy, data input to the remote terminal is restricted.
D8205/D8305 = 4: When DSR is off, the
OpenNet Controller can transmit data.
D8205/D8305 = 5 or more: Same as D8205/D8305 = 0. DSR is not used for data flow control.
Communication
Mode
DR Value
DSR (Input)
D8205/D8305
DTR (Output)
D8206/D8306
RTS (Output)
D8207/D8307
User
Communication
Mode
0 (default)
No effect
TXD/RXD disabled
OFF ON
1
No effect
TXD/RXD disabled
OFF OFF
2
No effect
TXD/RXD disabled
OFF OFF
3
No effect
TXD/RXD disabled
OFF OFF
4
No effect
TXD/RXD disabled
OFF ON
5 or more
No effect
TXD/RXD disabled
OFF ON
Maintenance
Mode
— No effect ON
While transmitting: OFF
Not transmitting: ON
DSR signal
ON
OFF
Possible
Impossible
Impossible
Transmit/receive
DSR signal
ON
OFF
Possible
Impossible
Impossible
Transmit/receive
DSR signal
ON
OFF
Possible
Impossible
Impossible
Transmit
DSR signal
ON
OFF
Possible
Impossible
Impossible
Transmit
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IDEC OpenNet series Specifications

General

Brand	IDEC
Model	OpenNet series
Category	Controller
Language	English