DZB100 Series
Appendix
Appendix B Serial Communications
The different AC motor drive parameters can be programmed and displayed by remote control
via the RS-485 serial interface. A personal computer may be used to load, change, or monitor
the parameter value through the PC's RS-485 interface, which permits communication with
higher-level automation systems.
This appendix describes the following:
Computer Control
Data Format and Protocol
Character Delay Time and Response Delay Time
Computer Control:
The DZB100 series AC motor drive has a built in RS-485 serial communication port on its
control terminal block marked SG+, SG-. The two connector pins are defined as follows:
SG +: Signal +
SG - : Signal -
Each DZB100 AC motor drive has a pre-assigned slave address specified by F1-78.
The computer may select any AC drive according to this slave address.
The computer may also control all of the AC drives connected to it when the "A" code in
command string is 02H.
Data Format and Protocol:
Data Format
Baud Rate (Transmission speed in bits per second)
Range of values: 1200, 2400, 4800 Baud (See F1-77)
Eleven (11) bits are required to represent each character, as shown in the following example:
Number of bits
Function
1
start bit
8
data bits
1
odd parity bit
1
stop bit
1
Start
bit
0
1
2
3
4
5
6
7
Odd Stop
parity bit
0
T
Character string
11-bit (character frame)
-68-
