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MODEM COMMUNICATION TO ABB RELAYS
Figure 31. Dial Out Initiation
Figure 32. Modem Command Mode Screen Upon Device Connection
At the conclusion of the communication session, one must remember to "hang up" the modem and
disconnect the device. Depressing the Alternate key and the "C" key simultaneously will display the
screen as illustrated in Figure 26. Use the down arrow " ↓" to select the "HANG UP" selection. The
program will issue the AT&H0 command.
Example 3 – Connection of a REL512 ASCII Front Port to Hyperterminal Software
PREFACE - The REL512 differs from the other two relays presented in Example 2 and Example 1
above. The communication port is a master/slave port design. The configuration port uses ASCII strings
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