• The minimum and maximum voltage levels of the sin/cos encoder must be entered in 4633.
• To assist in configuration, the controller provides real-time feedback of the minimum and maximum
sin/cos voltage levels. A rotating motor is required to determine these thresholds.
• To account for any sin/cos sensor latency, please ensure the correct latency is set in the general
encoder settings (4631
h
). Please contact Sevcon for recommended latency settings for specific
sin/cos sensors.
UVW configuration
Please refer to page 33 for electrical information on the UVW subsystem.
For a PMAC motor, a full 360⁰ sequence of UVW pulses must be present for each electrical cycle of the
motor.
UVW specific items are located in 4634
h
.
• If the UVW inputs are inverted (active-low) then this inversion can be accounted for in the UVW
settings.
• If significant latency is present, this can be accounted for in the general encoder settings (4631h).
Please contact Sevcon for recommended latency settings.
AB configuration
Please refer to page 32 for electrical information on the AB subsystem.
Please note, AB is not suitable for PMAC motors, since absolute position is required.
AB specific items are located in 4635
h
.
• The pulses per revolution must be set to match the encoder..
• If the AB inputs are inverted (active-low) then this inversion can be accounted for in the AB
settings.
Digital inputs
The state of the digital inputs can be monitored using I-Protocol.
Digital inputs are interpreted as both active high and active low. The value returned via the I-Protocol is
individually configurable.
Digital input status’ are constantly monitored and interpreted and are output using the I-Protocol as
“active”, “inactive” or “error”.
To configure digital inputs:
• Set active high/low logic at 4680
h
.
• Set digital input polarity at 6802
h
. This is used to configure normally closed/open switches.
Analog inputs
The analogue input voltage are read from I-Protocol messages, values are 12bit fixed point values with a
resolution of 1/256 V/bit (4:8 bit format), with 0xfff used to indicate that a channel is not used.
There are 2 variable analog supplies at pins H1 and F2.
Analogue outputs may also be controlled using the I-Protocol. Refer to the I-Protocol documentation for
more information. However the encoder supply is reserved by the encoder manager, and thus should be
set through the encoder configuration parameters and NOT set via I-protocol.
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