301% to 500%
2ms
1ms
10%
501% to 999%
1ms
0.5ms
5%
So for example, if the brightness is set to 350%, then the PP420 will not allow pulses greater than
2ms long. If the trigger pulses are too close together so that the lights are on for more than 10%
of the time, the PP420 will stop the output and flag an error.
4.3.3
Current Protection
The PP420 monitors the output current and voltage and ensures it is within acceptable limits. The
RE Ethernet command can be used to disable error checking.
This is not absolute protection but does provide some safety when setting up the PP420.
4.3.4
Channel Flags
Each channel has some configuration flags.
S Flag enables or disables autosensing. When this flag is set, the PP420 will autosense - when a
light is connected for the first time, the PP420 will wait for the current rating to be entered (using
the webpage, Config program or UDP message) before continuing. When this flag is not set, the
PP420 will use the previously set current rating.
E flag enables or disables error checking. When this flag is not set, the PP420 will not detect
lighting errors.
P flag inverts the trigger signal. In pulse mode, when set the PP420 triggers from the rising edge
of the trigger. When not set, the PP420 triggers from the falling edge. The falling edge may give
a slower response time. In Switch mode, when the flag is set, the output is on when the input is
on. Clearing the P flag inverts this operation
.