Encoder
mode
Description
DirectionUp
or
DirectionDown
The encoder triggers profiles when the object is moving forward.
If the object has moved backward, new profiles will be triggered as
soon as the object moves forward again.
DirectionUp
: "Forward" is defined as the positive direction.
DirectionDown
: "Forward" is defined as the negative direction.
Motion
The encoder triggers profiles when the object is moving either
backward or forward.
Table 6: Triggering modes
1
3
2
Position
Direction
Motion
1
Moving forward
2
Moving backward
3
Moving forward again
Single-channel encoder
A single-channel encoder uses only one encoder channel. The input from the encoder
to the camera is a differential signal, and a profile is triggered each time the signal
goes high.
When a single-channel encoder is used, the camera cannot differentiate between
forward and backward movement. The single-channel encoder mode is therefore only
visible and selectable when the
Encoder mode
(see
) is set to
Motion
.
State diagrams and trigger points
The encoder states and the possible transitions for a dual-channel encoder and a
single-channel encoder are shown in
. The trigger point depends on the type of
encoder used:
•
Dual-channel encoder, forward direction: The trigger point occurs when channel B
goes from 1 to 0. See figure A.
•
Dual-channel encoder, backward direction: The trigger point occurs when channel
A goes from 1 to 0. See figure B.
•
Single-channel encoder: The trigger point occurs when channel A goes from 0 to 1.
See figure C.
•
High-resolution encoder: The trigger point occurs for every single rising or falling
edge on any channel.
8
CONFIGURATION
58
O P E R A T I N G I N S T R U C T I O N S | Ruler3000
8026049//2021-04 | SICK
Subject to change without notice
