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Configuring Modbus
A Modbus Master or Modbus Slave setup can be easily created or modified by selecting the
corresponding Modbus entry in a Task’s Input or Output select menu. The similarities between
the Master and Slave operations of Modbus allow the setup screens and processes to be very
similar.
Determining Modbus Master or Modbus Slave
Both Modbus Master and Modbus Slave devices can support read and write operations. For this
reason, Modbus Master and Modbus Slave options are available in both the Select Input and Add
Output menus of the Edit Task screen of the System 5000
.
TM
The following definition should help in choosing which options to use:
The Modbus Master I/O should be used when the System 5000
is expected to initiate
TM
communication with other Modbus Slave devices on the network. Modbus Master Input
indicates a value will be read from a Modbus Slave, whereas Modbus Master Output
indicates a value will be written to a Modbus Slave.
The Modbus Slave I/O should be used when an external Modbus Master will be initiating
communication with the System 5000
, expecting a Modbus Slave. Modbus Slave Input
TM
defines a virtual register that expects to be written by a Modbus Master, whereas Modbus
Slave Output defines a virtual register that expects to be read by a Modbus Master.
As Modbus Slave devices await requests from Modbus Masters, the System 5000
Modbus
TM
Slave setups can also be viewed and configured within the Listening Ports Setup menu of the
System Setup - Communications tab.
8-2 Modbus
System 5000
TM
Содержание WaterLog Series
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Страница 58: ...5 14 Inputs System 5000TM...
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Страница 170: ...A 2 System 5000 Specifications System 5000TM...
Страница 172: ...B 2 Pressure Sensor Option Module Specifications System 5000TM...
Страница 174: ...C 2 Analog Digital Option Module Specifications System 5000TM...