Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 User Manual

Page 37

Configuring the Scanner through LIST

Chapter 2

2-11

1 - Node Mode

Select the

NODE MODE

option from the configuration screen to allow or

disallow the station communicating on the link. By selecting

NODE MODE

you can configure the channel to be online or offline.

If you select:

Then the channel is:

onĆline

an active station on the link.

offĆline

inactive and the DH/DH+ disable indicator is turned on.

Important: A reconfigure is not necessary to change this selection. The

NODE MODE

changes to the opposite selection and takes affect immediately.

An asterisk (*) displays in front of the selected modes.

2 - Station Number

Select the

STATION NUMBER

option from the configuration screen to

identify the PLC-3 station on the DH or DH+ link. You can specify an
octal station number by starting it with a leading 0. Otherwise, the scanner
treats it as a decimal number.

Allowable station numbers are:

for:

0 to 376 octal

0 to 77 octal

DH+

The number 377 octal is illegal. Entering 377 as the station number
automatically disables the channel, and you cannot enable it again until
you select a different station number in LIST. If you make no selection,
the scanner sets the station number for 377 octal (255 decimal) by default.

Important: You must set the protocol select switches for LIST
configurable before the scanner can modify this selection.

If you set the station number by using the switches (see chapter 1), the
scanner displays that number as decimal in LIST.

This line may show two values for the station number: selected and actual.
Both numbers display if they are different, and if these two situations
occur:

you changed the station number in line 2 but have not executed a

reconfigure to change the actual station number to the new number

the scanner in a backed up system assumes an address different from the

primary scanner until switchover occurs