DiaLog Elite PLC Interface Manual
2
Initializing the Modbus Master Interface Option
This chapter provides information for setting up the PLC Interface for operation with a
PLC or Modbus Slave connected to the RS-232 port.
The RS-232 port is a male DB9 connection configured as a DTE device. The pin out of
this connector is:
Pin
2 RX
Pin
3 TX
Pin
5 GND
The Modbus Master Interface is setup by defining the:
•
Serial port baud rate – default is 38400
•
PLC/Modbus ID – default is 1
•
Defining Elite I/O slots to be identified as PLC/Modbus I/O – default is that no slots
are enabled as PLC I/O slots.
There are 8 PLC I/O channels per Slot. You can enable as many slots as you have
purchased. For example, if you purchased a 32-channel PLC configuration, then you
can enable any 4 slots which do not have physical I/O cards attached.
All of these can be defined either through the integral keypad or remotely via a phone.
©
Antx, inc. 2001
Version 1.2
3
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