Dynapro Technologies Dynapro ET TCS, Application Developer'S Manual

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The Hardware Handshake command determines which RS-232 handshake signals must be
asserted before the TCS will transmit. In RS-232 systems, both CTS and DSR must be asserted
before the terminal can transmit. This causes problems in three-wire systems (RX, TX, and
GND) where CTS and DSR are not supported. In these situations, the Hardware Handshake
parameter must be set to “none” or the TCS will not transmit.
The handshake signals are selected by setting the Hardware Handshake parameter on the Setup
Screen to one of the following values:
•
none
•
CTS
•
DSR
•
CTS/DSR
When Hardware Handshake is set to “none”, the TCS will not check any RS-232 signals before
transmitting.
When Hardware Handshake is set to “CTS”, the TCS will only transmit while CTS is asserted.
When Hardware Handshake is set to “DSR”, the TCS will only transmit while DSR is asserted.
When Hardware Handshake is set to “CTS/DSR”, the TCS will only transmit while both CTS
and DSR are asserted.
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None
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The user selects the hardware handshake signals that are checked by TCS before transmitting by
entering the Setup Screen and setting the Hardware Handshake parameter to the desired value
using touchkeys or the optional keyboard.
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None. (This is a local command only.)