LRC-M1 and LRC-L1 Remote Control
User Manual
19
9M02-7634-A001-EN
Version 3
Sub Addressing Operational Procedure
1. Ensure the battery has sufficient charge.
2. Verify the OCU is in good condition.
3. Select the required Sub Address TransKeys to match the machines to be controlled. Insert these
TransKeys into the TransKey retainers on the left and right faces of the OCU.
4. Switch the sub address selection switches to the OFF positions.
5. Ensure the control levers are in the neutral position; controls in the off-neutral position will prevent
system start.
6. Ensure the E-Stop switch is released.
7. Ensure the Key/ON/OFF switch is turned ON.
8. The status LED should now flash green; however, if D-TDMA is in use, the status LED gives two
rapid orange flashes every second until the OCU finds and locks onto a free TDMA slot. Usually, this
takes less than a few seconds. The LED flashes green afterwards. If the status LED is flashing red or
not flashing at all, refer to Section 9: Troubleshooting.
9. Press and hold the reset button until all the machines reset as indicated by their individual status
lamps (a visible lamp positioned on the machine that indicates it is powered and reset, ready for use).
This can take up to approximately 5 seconds.
10. Switch on each of the sub address selection switches one at a time and test a basic function (such as
Horn) to ensure the required and expected machine is being commanded. When this is complete and
all machines verified, the required machine selection can be made and operation commenced.
Deselection of any machine is possible at any time by switching off the control toggle switch associated with that
sub address.
Removing any sub address TransKey disables that machine within five seconds. An alternate key could be
inserted without switching off the OCU, but the reset switch would need to be pressed again to capture that
machine, after which it should once again be verified that the correct machine has been activated.
5.10 D-TDMA
TDMA is an optional feature that allows many systems to operate on the same frequency, either to minimize the
number of RF licenses required on a large site or to make it possible to implement a system that requires many
OCUs to be on the same frequency at the same time.
It is possible to have MCUs use both TDMA and frequency scanning when implementing a large or complex
system comprising many MCUs.
As more TDMA slots allocate to a frequency, the system response to a switch change becomes slower, so a
balance between allocated TDMA slots and required response times is needed.
