16
COMMUNICATION INTERFACE
The controller is fitted with both standard RS232 and RS485 communication interfaces,
so computer can directly (or through a modem) communicate with controller and perform
remote start/stop, data monitoring and other functions.
RS232/485 interface uses MODBUS communication protocol. MODBUS is a master-
slave protocol, and the controller acts as a slave. When the controller receives a
request from the host (PC or monitoring host), it sends defined format data to the host.
The controller never sends data to the host actively.
17 CASE DIMENSIONS AND PANEL CUTOUT
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