Interface; Communication Address; Baud Rate - Satec System 295 Installation And Operation Manual

If you are using a printer instead of a computer, you should select the Prnt entry.
For the printout format, see Section 5.5. For the cable connections , refer to
Appendix D.

5.3.2 Interface

This parameter configures the communications port for EIA RS-232 or RS - 422/485
standards. In RS-232 and RS-422 modes, the communications port operates in full-
duplex mode, so incoming and outgoing messages are processed independently.
When RS-485 mode is selected, the communications port works in half-duplex
mode, so the receivers do not operate during transmission. You should not select this
mode when analog output extension via the AX-7 analog expander is used.
As mentioned above, selection of the communications parameters does not affect the
physical interface operation. If you do not need full-duplex mode, you can use RS-
485 mode in both 4-wire and 2-wire connections .

5.3.3 Communication Address

In order to allow networking of multiple Powermeter units connected to a single
communications line, each Powermeter on the network must have its own unique
address. Choices for address depend on communications protocol you are using .
In ASCII communications mode, address can be configured from 0 to 99. The
Powermeter having address 0 will respond to all master requests regardless of the
incoming address.
In Modbus communications mode, the address value may be chosen from 1 to 247.
In both the protocols, address 0 should not be configured for units if multidrop mode
is used. Address 0 is reserved for a master computer to broadcast to all Powermeters
in the network (for instance, when global resetting of the accumulated values at all
Powermeters is needed), but the Powermeters may not respond to such a request.

5.3.4 Baud Rate

The baud rate defines the communications speed, otherwise known as bps (bits per
second). The baud rate value can be selected from 110 bps up to 38,400 bps.
Effective communications depends on communications line quality. The better
communications line, the faster communications speed may be. Transmission quality
tends to degrade if line length increases and if the line is routed through an
Communications Operation 103