Anti-Streaming Timer; Setting Up Rs-485 Transition Time - TC Communications TC2100 User Manual

Anti-Streaming Timer

The TC2100 (slave) has a built-in Anti-Streaming Timer that prevents a defective RTU or PLC from bringing
down the entire network. The electrical channels (TxD & RTS) from the RTU(s) are monitored individually;
they are based on data (not control) signals. When the Anti-Streaming Timer is exceeded (after either 1,2
or 4 seconds of continuous transmission depending on customer's request), an alarm is triggered and the
RTU's defective electrical channel is automatically disconnected, preventing the unit from jabbering
continually. The timer will automatically reset once the jabbering subsides. The Anti-Streaming Timer can
be disabled by sliding both switch 1 and switch 2 of Slave's internal DIP switches(SW1) to the left (Off)
position.

Setting Up RS-485 Transition Time

RS-485 interface requires high impedance at the output when it is in idle condition. Transition time is defined
as the interval between last data bit sent and the output turns into high impedance. For different BAUD rate
the interval will be changed accordingly.
There are two DIP switches of SW1 are designated for this purpose. Please refer to the transition time table
to setup your RS-485 interface.
Baud
RS-422
4800
9600
19.2K & up
RS-485 Transition Time Table
Note: Refer to the Warranty Note on page 8 for warranty purposes before opening any unit(s) for internal settings.
Internal
SW1
SW8
SW7
Off
Off
Off
On
On
Off
On
On
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TC2100 DM
User's Manual
Ver. 1.6
MNL-21000-01-16