23: MODEM MODE
OPENNET CONTROLLER USER’S MANUAL 23-3
Data Registers for Modem Mode
When the modem mode is enabled, data registers D8200 through D8399 are allocated to special functions. At the first scan
in the modem mode, D8209/D8309 and D8210/D8310 store the default values, then D8245-D8269 and D8345-D8369
store an initialization string depending on the value in D8201/D8301, respectively.
Note: To change the D8209/D8309 or D8210/D8310 value, enter a new value in the next scan after entering 1 to D8200/
D8300.
Port 1 Port 2 Stored Data Description
D8200 D8300
RS232C Port
Communication
Mode Selection
Communication mode for RS232C port 1 or 2 is selected.
0 (other than 1): User communication mode
1: Modem mode
Enter 1 to D8200/D8300 to enable the modem mode after
setting DIP switch 2 or 3 to ON. When 1 is stored to D8200/
D8300, the modem mode is initialized at the next END pro-
cessing.
D8201 D8301
Modem
Initialization String
Selection
Depending on the value stored in D8201/D8301, a modem
initialization string is stored to D8245-D8269 or D8345-
D8369. When D8201/D8301 value is changed, a correspond-
ing initialization string is stored. See page 23-4.
Valid values: 0 to 5, 10 to 15, 20 to 25
When D8201/D8301 stores any value other than above, the
initialization string for value 0 is stored.
D8203 D8303
On-line Mode
Protocol Selection
The D8203/D8303 value selects the protocol for the RS232C
port after telephone line is connected.
0 (other than 1): Maintenance protocol
1: User protocol
D8209 D8309
Retry Cycles
(default = 3)
The D8209/D8309 value selects how many retries will be
made until the operation initiated by a start internal relay
M8050-M8056 or M8080-M8086 is completed. (See Note.)
0: No retry
1-65535: Executes a specified number of retries
D8210 D8310
Retry Interval
(default = 90 sec)
The D8210/D8310 value specifies the interval to start a retry
of dialing when a dialing fails with the retry cycles set to a
value more than 1. (Other start commands are repeated con-
tinuously as many as the retry cycles.) (See Note.)
Valid value: 0 to 65535 (seconds)
If a telephone line is not connected within the retry interval,
the OpenNet Controller starts a retry. Consequently, if the
retry interval is set to a too small value, the telephone line can
not be connected correctly.
D8211 D8311
Modem Mode
Status
Modem mode status is stored (see page 23-8). When not in
the modem mode, D8211/D8311 stores 0.
D8215-D8229 D8315-D8329
AT Command
Result Code
AT command result codes returned from modem are stored.
When the result code exceeds 30 bytes, first 30 bytes are
stored.
D8230-D8244 D8330-D8344
AT Command
String
AT command string for the AT general command mode is
stored. Enter an AT command string to these data registers to
send by turning on M8054/M8084 (AT command start internal
relay). “AT” and LF (0Ah) are appended automatically.
D8245-D8269 D8345-D8369 Initialization String
Initialization string for the originate and answer modes is
stored depending on the D8201/D8301 value.
To change the initialization string, enter a new value without
changing the value of D8201/D8301. The new value is sent by
turning on M8050/M8080 or M8055/M8085. “AT” and LF
(0Ah) are appended automatically.
D8270-D8299 D8370-D8399 Telephone Number
Telephone number for dialing in the originate mode is stored.
“ATD” and LF (0Ah) are appended automatically.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
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