OPERATION MANUAL CompoBus/S

Remote Terminals Section 5-1
Indicator Status Meaning
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.
Switch Settings Rotary and DIP switches are used to enter settings.
Rotary Switch
Node number setting
Reserved
(Always OFF)
DIP Switch
Reserved (Always OFF)
Communications mode setting
(SRT2 Series)
or Reserved (Always OFF)
(SRT1 Series)
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.
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
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 becomes
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 2-1
Communications Specifications for details.
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