Delta EtherCAT Programming Manual page 383

High Speed Pulse Compare Function
All advanced type motion cards of Delta provide high speed pulse compare function. As soon as
the pulse compare function is carried out, it sends a differential signal for triggering the camera to
take photos.
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The motion card has two high speed pulse input channels. There are two ways to trigger the
camera function, externally or internally trigger (from the PC). Delta provides two sets of
differential signal output points on one side of the motion card as well as the other side that is
inserted in the PC. The channel of both internal and external output points will be triggered
simultaneously when condition is fulfilled.
The high speed pulse compare function has two types, which is determined by two channels for
outputting differential signals. The channel 0 of differential singal (PIN11 &12 of CN2 and CN9),
hereafter simplified as channel 0, is for pulse comparing that is performed at fixed intervals. The
channel 1 of differential singal (PIN13 &14 of CN2 and CN11), simplified as channel 1, is for
pulse comparing that is performed at user-defined intervals and its trigger position is
user-defined. The two sets of differential signals can share both channel 0 and 1.
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EtherCAT Programming Guide
March, 2017