Omega A2400 Chapter Setup Information/SetUp Command, Command Syntax, $1SUbyte 1byte 2byte 3byte

Chapter 5

Setup Information/SetUp Command

The A2400 features a wide choice of user configurable options which gives them the flexibility to operate on virtually any radio or leased-line modem. The user options include a choice of baud rate, parity, address, and many other parameters. The particular choice of options for a module is referred to as the setup information.

The setup information is loaded into the module using the SetUp (SU) command. The SU command stores 4 bytes (32 bits) of setup information into a nonvolatile memory contained in the module. Once the information is stored, the module can be powered down indefinitely (10 years minimum) without losing the setup data. The nonvolatile memory is implemented with EEPROM so there are no batteries to replace.

The EEPROM has many advantages over DIP switches or jumpers normally used for option selection. The module never has to be opened because all of the options are selected through the communications port. This allows the setup to be changed at any time even though the module may be located thousands of feet away from the host computer or terminal. The setup information stored in a module may be read back at any time using the Read Setup command (RSU).

The following options can be specified by the SetUp command:

Channel address (122 values)

Linefeeds

Parity (odd, even, none)

Baud rate (300 to 115200)

Addressing (Normal, Extended)

Character Filter enable/disable

Alternate RTS

Digital output enable

CTS active low/high

RTS active low/high

Each of these options will be described in detail below. For a quick look-up chart on all options, refer to Tables 5.1-4.

Command Syntax

The general format for the SetUp (SU) command is:

$1SU[byte 1][byte 2][byte 3][byte 4]