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RS485 Protocol C-1
APPENDIX C
RS485 Protocol
C.1 Introduction
The drive can be controlled and monitored by the program of aPLC or other master
module.
Drives or other slave devices may be connected in a multi-drop fashion on the RS-485
network and may be monitored or controlled by a single PLC or PC. Parameters can
be set and changed through the PLC or PC.
C.1.1 Features
The VS1MD can easily be utilized for factory automation applications because
operation and monitoring are available by the user’s program.
• Parameter change and monitoring is available via computer. (Ex: Accel/Decel time,
Freq. Command etc.)
• RS484 Interface:
1. Allows the drive to communicate with any other computers or PLC’s.
2. Allows connection of up to 31 drives with multi-drop link network.
3. Inherent noise immune design.
Users can use readily available RS232-485 converters. The specifications of
converters depend on the manufacturers.
C.1.2 Before Installation
!
ATTENTION:Before installation and operation, this manual should be
read thoroughly. Failure to observe this precaution could result in
personal injury or damage to the equipment.