![background image](http://html1.mh-extra.com/html/omron/c200hw-srm21-v1-cs1w-srm21/c200hw-srm21-v1-cs1w-srm21_operation-manual_742333180.webp)
159
Remote Terminals
Section 5-1
Switch Settings
Rotary and DIP switches are used to enter settings.
Note
1.
Always turn OFF the Slave before changing DIP switch settings.
2.
In the SRT1 Series, pin 3 must always be left OFF. Otherwise, the Unit may
not function correctly.
3.
All pins marked “RSV” (reserved) must be left OFF. If any of them is ON,
the Unit may not function correctly.
Node Number Settings
The rotary switch specifies node numbers as hexadecimal numbers, as
shown below.
Note
1.
Node numbers of 16-point Slaves are always treated as even numbers.
Even if an odd number is specified, the actual node number setting be-
comes the even number immediately preceding it.
2.
The actual node number setting range depends on the type of PLC in
which the Master is mounted as well as the Master’s settings. Refer to
for details.
COMM (yellow)
ON
Normal communications
OFF
A communications error has occurred or the Unit is in
standby status.
ERR (red)
ON
A communications error has occurred.
OFF
Normal communications or the Unit is in standby status.
0 to 15 (yellow)
ON
The corresponding input is ON.
OFF
The corresponding input is OFF or the Unit is in standby
status.
Indicator
Status
Meaning
Rotary Switch
DIP Switch
Reserved (Always OFF)
Communications mode setting
(SRT2 Series)
or Reserved (Always OFF)
(SRT1 Series)
Reserved
(Always OFF)
Node number setting
Node number
Setting
(Hexadecimal)
Node number
Setting
(Hexadecimal)
0
0
8
8
1
1
9
9
2
2
10
A
3
3
11
B
4
4
12
C
5
5
13
D
6
6
14
E
7
7
15
F