Modbus Communication Interface
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8-1
MODBUS COMMUNICATION INTERFACE
This chapter describes the customer serial communication interface on
the IPS-4 Analyzer. The communication protocol implemented is Modicon
Modbus as defined in “Modicon Modbus Protocol Reference Guide” (PI-
MBUS-300 RevJ). The Modbus protocol transmission mode implemented
is Remote Terminal Unit (RTU) with the analyzer operating as a slave
device.
The IPS-4 Analyzer supports RS-485 serial communication standards. The
physical communication connection between an IPS-4 analyzer and a cus-
tomer DCS\SCADA\PLC\DAS or a general-purpose computer is RS-485.
The analyzer RS-485 connection supports 2-wire multi-drop systems.
Hardware:
The jumpers on the CPU board
J9
connector should be installed between
the 1-2 and 3-4 pins.
The converter terminal marked
TD(B)
which is same as Tx+ should be
connected to the
CCB_J14
connector marked
Tx+
(pin 3) on the Custom-
er Connection Board, and
TD(A)
should be connected to
Tx-
(pin 4).
Содержание Western Research IPS-4
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Страница 231: ...Appendix A Drawings A 15 Infrared Source Assembly Interface Board 100 2838 IR Optical Bench...
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