Serial Communications - Control Techniques UD52 User Manual

4.3

Serial communications

When absolute positioning is required, connect terminals 46, 47 Serial
communications to the appropriate connections on the encoder.
The serial link allows the Drive (at power-up) to interrogate the
encoder in order to determine the initial absolute position of the encoder
shaft. When the interrogation is completed, the serial link is disabled.
If the serial link fails, the Drive will trip, showing trip code
When a
SIN
Servo mode, absolute-position and phase-offset information is always
required. In the Closed-loop Vector mode for controlling an induction
motor, absolute-position and phase-offset information are optional.
When this information is not required, serial communications connections to
the encoder do not need to be made. In this case, set parameter 16.16
encoder – serial comms disable at 1 (otherwise a
S -
IN COS
at power-up).
Operating mode
Closed-loop Servo mode
Closed-loop Vector mode when absolute-position
information is required
Closed-loop Vector mode when absolute-position
information is not required
UD52 User Guide
Issue code: 52nu3
- encoder is used with a Drive operating in the Closed-loop
COS
Connect to serial comms. port
of -
SIN
No connections
SEP EC
SEP EC
Terminals Parameter
46, 47
encoder
COS
-
SIN COS
.
trip will occur
16.16
0
1
11