Power Electronics SD700FL Series, Руководство по аппаратному обеспечению и установке

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POWER ELECTRONICS
SD700FL SERIES
MODBUS COMMUNICATION
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8. MODBUS COMMUNICATION
8.1. Introduction
To guarantee a correct operation of the drive, peripheral elements should be selected correctly and
should be connected properly. A wrong installation and/or application could cause a wrong operation of
the system or a reduction of the long life of the equipment, and its parts may be damaged. This manual
should be read carefully and understood before proceeding.
The purpose of the Serial Communication Network of the SD700FL is to integrate the drive itself into a
network compatible with the Modbus communications protocol. This is possible using RS232 or RS485
physical communications port or USB port. For this, it is necessary to modify the position of the jumper of
the control board JP1101
– JP1104. Communications ports are clearly indicated in that connector. Put
the jumper in the desired position according to your needs.
Figure 8.1 Jumper for communications port selection
Modbus communication system allows SD700FL drives to be controlled and/or monitored as a slave by a
Modbus master from a remote location.
RS485 network allows connecting up to 240 equipments in the same network. Nevertheless, RS232
network only allows connecting one unit (slave) into the network.
SD700FL drives operate as a peripheral slave when connected to Modbus system. This means that the
drive do not start the communication task, master will be the one that starts this task.
Practically all of the operating modes, parameters and drive characteristics are accessible through serial
communications. For example, master can give start and stop order to the drive, control SD700FL status,
read the current used by the motor etc., in short, master can access all of the possibilities of the drive.