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34 T1/T1S User’s Manual
1. System Configurati on

1.7 T1S communication function

The T1S has an RS-485 muiti-purpose communication port. This port can work
independent of t he pr ogrammer por t.
By using this communication port, one of the f ollowing three communication modes is
available, computer link mode, data link mode and f r ee ASCII mode.
For details of these f unct ions, r efer to t he separate manual “T 1/T1S User’s Manual -
Communication Funct ion -”.
Item Computer link Free ASCII Data link
Interface Conform s to RS-458 (4-wire or 2-wire)
Transm ission s
y
stem Half-duplex
S
y
nchronization Start- stop s
y
stem (as
y
nchronous)
Transmission code ASCII/binar
y
ASCII Binar
y
Transm ission speed 300, 600, 1200, 2400, 4800, 9600, or
19200 bps 19200 bps (f ixed)
Transm ission distance 1 km m ax.
Framin
g
Start bit : 1 bit
Data bits: 7 or 8 bits
Parity: Odd, even, or none
Stop bit: 1 or 2 bits
Special
Protocol T-series
computer link
(ASCII),
Pro
g
rammer
(binar
y
)
User def ined
ASCII messa
g
es Special
Link confi
g
uration 1-to-N N/A 1-to-1
Transm ission dela
y
option 0 to 300 m s N/A N/A
Computer link mode
T-ser ies computer link protocol can be used in this mode. A m aximum of 32 T1Ss can
be connected to a mast er computer.
By using this mode, all the T1S’s data can be accessed by a master com puter.
The T-series PLC progr am m ing software (T-PDS) can also be used in this
configuration.
Master Computer
RS-485 (1 k m max.)
Max. 32 T1Ss
T1 T1 T1T1
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