59
ModBus Resources
ModBus is a public protocol that can be freely adopted by any developer or
manufacturer desiring to implement it. While a detailed discussion of
ModBus protocol is beyond the scope of this manual, there are a number of
up-to-date resources available on the internet for those wishing to
investigate
ModBus
further.
The
most
complete
resource
is
Termination
When putting devices on the ModBus network, a terminating resistor may be
required for the last device on the network (please see www.modbus.org for
more details).
The
has a blue jumper on the “public” jumper
that can be used to jumper in a 120-Ohm terminating resistor. By default,
this jumper is not in place. Industrial Scientific - Oldham does not
recommend changing the placement of any of the other jumpers on this
board.
Figure 6-2 Location of Jumpers
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Страница 22: ...22 Figure 3 1 Mounting the Gas Monitor on a Wall Figure 3 2 Mounting the Gas Monitor on a Column Using U Bolts...
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Страница 72: ...72 Figure A 4 Wiring Diagram of Single Sensor HART Supported...
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