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Baud Rate Switches
Switches 1, 2 and 3 of the eight position DIP switch are used to match the baud rate of the drive
to the baud rate of the programming device. If the two baud rates are not the same, serial
communication will not be possible.
Axis Identifier Switches
Switches 4, 5, 6, 7 and 8 are used to distinguish between drives in a multi-axis application. This
allows each axis to be programmed individually over the same mutli-drop serial cable.
Duplex Switch
Switch 1 of the four position DIP switch sets either Half or Full Duplex Mode. In Half Duplex
Mode the serial data is not echoed back to the programming device for conformation or display.
In Full Duplex Mode the data is echoed back to the programming device, allowing the data to be
verified. In most cases Full Duplex is the preferred mode of operation.
Auto Line Feed
Switch 2 is used to determine if a line feed character should be echoed back to the programming
device when a carriage return is received. This will alter the line spacing on the programming
monitor.
NOTE: Switches 3 and 4 have been discussed previously in the "Optional Operating Modes"
section.
Framing Information
When using serial communication, the data must be sent as a string of continuous bits. This
string of data bits must be "framed" by start and stop bits so that valid data can be recognized.
The framework which the drive will recognize is as follows:
1 start bit
8 data bits
1 stop bit
The high order data bit is ignored by the drive. A parity bit may therefore be sent to the drive
along with only seven data bits. When transmitting, the drive will always send a zero for the
eighth data bit.
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