User guide

Hardware
32
890 USE 108 00 August 2001
Slide Switches The communication parameter slide switch is used to select a bridge mode between
a Modbus master device and Modbus Plus. (For a detailed description of bridge
mode functionality and other Modbus Plus capabilities provided with the A984-145,
E984-245/255 Controller, see Bridge Mode Between Modbus and Modbus Plus,
p. 91. (See 9-Pin Port/Cable Pin-Outs, p. 70 for 9-pin cable pin-outs.)
Modbus Plus
6-Position DIP
Switch
These three models have identical MB Plus DIP Switches. (See 6-Position DIP
Switch -Node Addressing, p. 80.)
Modbus Plus
LED
Other than the bottom indicator, LEDs on these three models have the same
function as those on the E984-241/251. (Port 1 is labeled Modbus). (See LED
Indicators, p. 30.) The MB Plus LED is a green indicator that shows the type of
communications activity on the Modbus Plus port on A984-145, E984-245/255
Controllers.
A specific flash pattern indicates the nature of the Modbus Plus communication
activity. (See Modbus Plus LEDs A984-145, E984-245/255/265/275/285, p. 216 and
Modbus Plus LEDs, p. 86.)