LTDVE8CH-20 – INSTRUCTION MANUAL
20
If the button is sampled as pressed, the user is given a ten seconds interval to start the firmware update
procedure (see
). If the firmware update procedure is not started in then ten seconds interval,
the settings are restored to the factory values and the controller resumes normal operation.
During the ten seconds interval the RUN and ERR LEDs blink at a high rate to emphasize the
circumstance. In the meantime, the use of the serial RS485 interface is restricted to the firmware
update and the Modbus/TCP, Modbus/UDP and HTTP protocols are not available.
The INIT button is concealed by a hole located between the terminal blocks and the shell connector.
12. Pulse shaping logic
Each of the eight channels can be individually configured to output pulses based either on a discrete
external trigger signal or an internally-generated trigger. A wide variety of internal triggers can be
produced by configuring the internal pulse shaping logic.
This logic includes sixteen pulse generators and several multiplexers. The pulse generators allow
pulse delay and width control down to 1 µs resolution. The multiplexers, organized as two routing
matrices, allow for the flexible selection of the pulse generators inputs and outputs.
An output protection circuit, used to prevent the light from getting overheated and thus damaged, is
also included in this logic.
12.1. Diagram of internal logic
The drawing of
Figure 4: diagram of internal logic network
depicts the logic network built in the
controller.
Figure 4: diagram of internal logic network
The eight synchronization inputs are shown at the left (TR1, TR2, TR3. TR4, TR5, TR6, TR7 and
