IES 4416, Manual

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3.4 SYNC and CONT modes
The LED controllers may operate in SYNC mode or in CONT mode. The actual mode can be read
with the command GMOD ("get mode"), which is answered with a string like "0000". These are two
hex numbers 00 and 00 which reflect the settings für mode and sync edge.
To change the operating mode use command "SMODxxxx" (set mode"), where xxxx is the number
from this table:
Mode xxxx
Sync 0000
Cont 0101
For example send SMOD0000 to set sync mode.
3.5 External sync input
The devices have an internal frequency generator and feed the signal to cameras and light. They
also have inputs for external sync signals. These can be fed in at connectors MAIN, 5B or CAM1,
with MAIN/5B beeing connected in parallel and beeing the default. If CAM1 is to be used, see 3.6
to set the sync input multiplexer correctly.
LED controllers detect the external signal automatically. If detected, the yellow LED is switched on
and the rising edge of the external signal is used to trigger an output pulse to cameras and lights. It
means, that for every rising edge one sync pulse with the configured width (see Diag4400) is
output. For example, if setting up 250 µs pulse width and applying an external signal of 1000 Hz,
then the cameras and lights will see one pulse 250 µs every 1 ms. If lowering the external
frequency to 100 Hz, the pulse width remains unchanged, so cameras and devices will see a pulse
with 250 µs every 10 ms.
3.6 Special Functions
Some special functions are implemented into the LED controllers. These functions can be switched
on or off using the Diag4400 software, see below. The bits are combined to form a number value.
An example: If TLH function and ET0 function are wanted, this gives a value 1+4 = 5 to be stored
into the device.
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
- - - - - ET0 SYM TLH
TLH Set Temperature limit high
Setting may be used for climate chamber operation. LED heads will NOT be switched off at
elevated temperatures, when set. It is then a responsibility of user to ensure switching off before
damages to LED head or illuminated objects can occur.
SYM Sync multiplexer
If set, the external sync signal is taken from CAM1 connector. If not set, the external sync signal is
taken from MAIN (or 5B) connectors.
ET0 Emergency T0
When set, controller switches ON the light if a T0 signal is received. This provides some additional
"feel well" in scenarios where long delays between start light and T0 may occur and thus a timer
could unhappily may be timed out. A disadvantage of ET0 is, that light is switched ON repeatedly