149
Remote Terminals
Section 5-1
Indicators
The following table shows the meaning of the indicators.
DIP Switch
The DIP switch is located on the left side of the Transistor Remote Terminal,
under the cover. Always turn OFF the Slave before changing the node number
setting.
Note
1.
Always turn OFF the Slave before changing DIP switch settings.
2.
In the SRT1 Series, pin 2 must always be left OFF. Otherwise, the Unit may
not function correctly.
Communications Mode Settings (SRT2 Series Only)
The following communications modes are set with pin 2.
The communications mode settings using pin 2 only apply to SRT2-series
Slaves and cannot be used with the SRT1-series Slaves, which operate in
High-speed Communications Mode at all times.
Note
Make sure that the communications mode of the Slave is the same as that of
the Master Unit. If the communications modes are not the same, normal com-
munications with the Master Unit will not be possible. The operating status of
the Slave can be verified with LED indicators. Refer to
Indicator
Status
Meaning
PWR (green)
ON
The communications power supply is ON.
OFF
The communications power supply is OFF.
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 3 (4 inputs)
0 to 7 (8 inputs)
0 to 15 (16
inputs)
(yellow)
ON
The corresponding input is ON.
OFF
The corresponding input is OFF or the Unit is in standby
status.
Reserved (Always OFF.)
Node number setting
Communications mode setting (SRT2 Series)
or Reserved (Always OFF.) (SRT1 Series)
Pin 2
Communica-
tions mode
Communica-
tions distance
Communica-
tions baud rate
Communica-
tions cycle time
OFF
High-speed Com-
munications
Mode
100 m max.
750 kbps
0.5 or 0.8 ms
ON
Long-distance
Communications
Mode
500 m max.
93.75 kbps
4.0 or 6.0 ms