User guide

Communication Capabiliites
76
890 USE 108 00 August 2001
MODBUS Port
Parameters
(3-Position Slide
Switch)
Two three-position slide switches are located on the front of the E984-258/265/275/
285 PLCs. The three-position slide switch on the bottom is used to select the
communication parameter settings for Modbus (RJ45) port one. The top switch is
used for memory protection in the top position, no memory protection in the middle
position, and swapping PCMCIA card (pull-PC 275/285 only) in the bottom position.
When you connect a programming panel to start the controller for the first time, your
panel device must use the following Modbus port parameters: 9600 baud, EVEN
parity, RTU mode, Modbus port address 1.
The following figure shows the switch positions for the various 275/285 and 258/265
models.
Note: The E984-258/265 does not support a PCMCIA card.
275/285
258/265
mem prot
off
pull-PC
ASCII
RTU
mem
mem prot
off
ASCII
RTU
mem