Specifications

Command Descriptions 97
Hardware Handshaking Bit
If the Hardware Handshaking Bit is 1, the controller will support hardware
handshake signals typically implemented in EIA RS-232 communications.
Hardware Handshaking is enabled by factory default. To ease troubleshooting of
the initial installation, jumper J3 can be installed to force the controller to ignore
Hardware Handshaking. For more information, see Hardware Handshaking, page
53.
Invert Hardware Handshaking Bit
If the Invert Hardware Handshaking Bit is 1, the sense of the handshaking signals
are inverted (except DSR). This feature is provided as a tool for use in installations
where the controller may be forced to share a serial link with another device.
Hardware Handshaking is not inverted by factory default.
Full-Duplex Bit
If the Full-Duplex Bit is 1, each character sent to the controller is echoed. When
Half-Duplex Mode is selected (Full-Duplex Bit is 0), the controller does not
retransmit each received character.
The factory default is Half-Duplex. For more information, see Duplex, page 54.
Other Communication Parameters
Setting the controller to 7-Bit Mode will make many commands unusable. As the
SmartSet command set requires 8-bit binary data, 7-Bit Mode can only be used
when the controller is in a Partial Emulation Mode and is transmitting ASCII data.
The total number of serial bits must be between 7 and 10 inclusive. For example, 8
Data Bits, 2 Stop Bits, and Even Parity is illegal.
The factory defaults for serial controllers when booting from NVRAM are 9600
Baud, 8 Data Bits, 1 Stop Bit, No Parity, normal Hardware Handshaking enabled,
Software Handshaking disabled, Half Duplex, and correct Checksum not required.
The Baud Rate and Hardware Handshaking options may be overridden if the
controller boots from jumper settings.