The Longitudinal Wave

Hexamite

Technical Manual HE660

Program Control Byte

Program control byte allows the mode of operation to be altered externally (over the RS485 or RS232 link). This is done by clearing or setting the bits of the byte.

Bits of the Byte	Here's what they do
Bit 0	If set then device transmits Sonic Signal via Air or Water
Bit 1	If set the device is an initiator in a chain
Bit 2	Reserved
Bit 3	Reserved
Bit 4	Reserved
Bit 5	If set output pin is PWM. If clear, output pin is Proximity Alarm
Bit 6	If set Auto Tracking is enabled
Bit 7	If set device executes acquisition cycles and transmits results continuously

Termination Byte HE660P485 and HE660S485 (only) Chain Operation

If the termination byte of device 'X' is the primary address of device 'Y' on the same network, then device 'Y' will be prompted to transmit it's satellite scan result, once device 'X' has completed it's transmission of it's own scan results. { IF (the last device in the network chain has a termination byte 'Carriage return') AND (the first device in the network chain has been set up as an initiator) THEN the chain scan cycle is repeated indefinitely with very high sampling integrity }. The chain reaction is propelled by the "GO" transmission of the chain initiator device. In this case a continuous data stream containing the absolute position of each satellite relative to each monitor, is transmitted on the network or via radio on the airways.

Any combination of device chain clusters can be set up; and the chain reaction on the network can be propelled by a personal computer or a handheld reader/controller unit. Note that a device acting alone with termination byte equal to 'Carriage Return' will not restart it's own cycle. If continuous cycling is needed bit.7 of the program control byte should be set.

Reverberation Delay Byte

In case of excessive reverberation, i.e. ultrasonic lingered hum in the container or room. Setting up a reverberation delay may help solve the problem, the reverberation delay is in terms of 10mS intervals, therefore if you set the reverberation delay 20 hex, corresponds to 32 decimal, the total delay is 32 * 10mS or 0.320 seconds. Outdoors where the signal doesn't continuously bounce between surfaces, reverberation delay is not needed.

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