![background image](http://html1.mh-extra.com/html/omron/srm1-programing-02-2001/srm1-programing-02-2001_programming-manual_742414237.webp)
3-3
Section
CompoBus/S I/O Link Units
217
DIP Switch Settings
Use the DIP switch to set the CompoBus/S I/O Link Unit’s node number, commu-
nications mode, and the status of output data when a communications error oc-
curs.
DIP switch
CPM1A-SRT21
CPM2C-SRT21
Pin
labels
Contents
1, 2, 4,
and 8
Node Address Setting
Pins
Pins
Address
8421
Address
8421
0
0000
8
1000
1
0001
9
1001
2
0010
10
1010
3
0011
11
1011
4
0100
12
1100
5
0101
13
1101
6
0110
14
1110
7
0111
15
1111
1 = ON, 0 = OFF
DR
ON
Long-distance communications mode (See note 2.)
OFF
High-speed communications mode
HOLD
ON
Retain inputs after a communications error.
OFF
Clear inputs after a communications error.
Note
1. Always turn OFF the power supply before changing the DIP switch settings.
2. Never touch the DIP switch when the Unit is operating. Static electricity may
cause operating errors.