Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

The Modem Command entry box in the INIM element configuration is where the configuration

commands are entered. When the INIM function is energized during a Ladder Logic program the

command string that is in the Modem Command entry box is sent to the 5901 modem.

Note: The INIM function automatically inserts the AT command when the command string is sent

to the modem.

Note: When using SCADAPack com3 or SCADAPack Plus com3 or com4 the 5901 configuration

must disable hardware flow control. See the &K0 command in Appendix C for more

information.

To initialize the 5901 to use the factory default settings, answer on the first ring and then save this

configuration in user profile 0 the initialization string would look like this:

&F0 S0=1 &W0 &Y0

where:

&F0 Sets the modem for factory defaults.

S0=1 Sets the modem to auto-answer after one ring.

&W0 This command saves all the configuration settings before it as user profile 0.

&Y0 To use the settings in user profile 0 the command &Y0 is used. The &Y0 command

will select the configuration settings of user profile 0 after a hard reset (power

cycle).

5.2.3 Initiating Dial-Up Modem Connection

The SCADAPack or TeleSAFE Micro16 controller may initiate a dial up connection using the

TelePACE Ladder Logic DIAL function. Refer to the TelePACE Ladder Logic Reference and User

manual for complete information on this function.

When the Ladder Logic DIAL function is energized the auto-recovery circuitry in the 5901 modem

causes the 5901 modem to reset. The &Y0 command, in the INIM function above, ensures the 5901

modem uses user profile 0. Once the 5901 modem reset is complete the telephone number in the

Phone Number box is sent to the 5901 modem. The 5901 modem then will attempt to connect with

the remote modem.

Note: When the &Y0 command is used in the INIM function no command string is required in the

Modem Initialization box.

Note: When using SCADAPack com3 or SCADAPack Plus com3 or com4 the 5901 configuration

must disable hardware flow control. See the &K0 command in Appendix C for more

information.

5.2.4 Communicating with a Remote Controller

Once a dial up connection has been made with a remote station the SCADAPack or TeleSAFE

Micro16 controller may send information to, or receive information from, the remote station using

the TelePACE Ladder Logic function MSTR. Refer to the TelePACE Ladder Logic Reference and

User manual for complete information on this function.