262
Remote I/O Modules
Section 5-3
Communications Mode,
Node Number and Output
HOLD/CLEAR Mode
Set the node number with the NC, ADR1 through ADR3, and hold/clear output
setting terminals.
Note
The HOLD terminal is not used by the Input Module.
Communications Mode Settings (SRT2 Series Only)
The following communications modes are set with the communications mode
setting terminal (DR) as shown below.
Communications mode settings are possible for SRT2-series Slaves only.
SRT1-series Slaves are always in high-speed communications mode.
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. The COMM terminal corre-
sponds to the COM indicator and ERR terminal corresponds to the ERR indi-
cator.
Node Number Settings
Set the node number with terminals ADR1 through ADR3, as shown in the fol-
lowing table.
Note
1.
Low: The input bit is ON. Hi: The input bit is OFF.
(see note 1.)
BS– or G
Note
1. The DR terminal is not used by the SRT1 Series.
2. The HOLD terminal is not used by the Input Module.
3. Low: The input bit is ON. Hi: The input bit is OFF.
(see note 2.)
SW (see note 3.)
circuitr
y
Inter
nal
DR
Communica-
tions mode
Communica-
tions distance
Communica-
tions baud rate
Communica-
tions cycle time
Hi
High-speed Com-
munications
Mode
100 m max.
750 kbps
0.5 or 0.8 ms
Low
Long-distance
Communications
Mode
500 m max.
93.75 kbps
4.0 or 6.0 ms
Node number
ADR3
(8)
ADR2
(4)
ADR1
(2)
0
Hi
Hi
Hi
2
Hi
Hi
Low
4
Hi
Low
Hi
6
Hi
Low
Low
8
Low
Hi
Hi
10
Low
Hi
Low
12
Low
Low
Hi
14
Low
Low
Low