Omega A2400 User Manual
Page 36
Command Set 4-15
T2 is specified in units of milliseconds with a range of 0 to 2000ms. The time
data must be formatted as a plus sign, five decimal digits, a decimal point,
and two additional digits:
Command:
$1T2+00350.00 (Set T2 to 350 ms.)
Response:
*
Command:
#1T2+00350.00 (Set T2 to 350 ms.)
Response:
*1T2+00350.0092
Set Time Delay 3 (T3)
T3 is the delay time between the last character transmitted to the host and
the trailing edge of RTS signal which turns off the remote transmitter. The
A2400 will transmit data to the modem until the receive buffer is empty.
When the receive buffer is empty, and the last character has been transmit-
ted, time delay T3 is activated. T3 provides two functions: it provides a clean
break between the transmitted data and the turn-off of the radio transmitter,
and it allows the host to poll more data without keying the transmitter on and
off. During time T3, the host may transmit another command which would
pass through the A2400 to the RS-485 bus. Typically, this command would
generate a response from a device on the RS-485 bus. If the response data
is received by the A2400 before T3 is complete, T3 is canceled and the
received data is immediately transferred to the modem. When the receive
buffer is empty, T3 is activated again, and the cycle repeats itself. This allows
the host to establish communications with the remote radio and talk back
and forth without wasting time re-keying the transmitter for each response.
If T3 times out and the receive buffer is empty, the radio connection is
terminated by turning off the RTS signal.
Command:
$1T3+00050.00
(Set T3 to 50 ms)
Response:
*
Command:
#1T3+00050.00
(Set T3 to 50 ms)
Response:
*1T3+00050.0090