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T1/T1S User’s Manual
1. System Configuration
1.7 T1S communication function
The T1S has an RS-485 muiti-purpose communication port. This port can work
independent of the programmer port.
By using this communication port, one of the following three communication modes is
available, computer link mode, data link mode and free ASCII mode.
For details of these functions, refer to the separate manual “T1/T1S User’s Manual
-
Communication Function
-
”.
Item
Computer link
Free ASCII
Data link
Interface
Conforms to RS-458 (4-wire or 2-wire)
Transmission system
Half-duplex
Synchronization
Start-stop system (asynchronous)
Transmission code
ASCII/binary
ASCII
Binary
Transmission speed
300, 600, 1200, 2400, 4800, 9600, or
19200 bps
19200 bps (fixed)
Transmission distance
1 km max.
Framing
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),
Programmer
(binary)
User defined
ASCII messages
Special
Link configuration
1-to-N
N/A
1-to-1
Transmission delay
option
0 to 300 ms
N/A
N/A
Computer link mode
T-series computer link protocol can be used in this mode. A maximum of 32 T1Ss can
be connected to a master computer.
By using this mode, all the T1S’s data can be accessed by a master computer.
The T-series PLC programming software (T-PDS) can also be used in this
configuration.
Master Computer
RS-485 (1 km max.)
Max. 32 T1Ss
T1
T1
T1
T1
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: [email protected]