AMCI SMD17K, Руководство пользователя

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20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786

Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
SMD17K User Manual
SMD17K S
PECIFICATIONS
17
Optional Encoder
The SMD17K can be ordered with an integral encoder. The encoder can be used for position verification and
stall detection. Additionally, an input can be configured to capture the encoder value when the input makes an
inactive to active transition. This captured value is written to the host controller. Two encoder options are
available:
Incremental Encoder
The incremental encoder can be programmed to 1,024, 2,048, or 4,096 counts per turn. The SMD17K has an
internal thirty-two bit counter associated with the encoder. The incremental encoder are primarily used for
position verification and stall detection.
Absolute Multi-turn Encoder
The absolute encoder has a fixed resolution of 2,048 counts per turn. The absolute encoder is a multi-turn
device that encodes a total of 2
21
turns, yielding a full thirty-two bits of position resolution. The absolute
encoder can be used for position verification and stall detection, but its primary advantage is that it eliminates
the need to home the axis after cycling power to the drive.
Like many intelligent absolute encoders on the market today, the absolute encoder in the SMD17K uses
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a battery backed circuit to count zero crossings while power is removed from the rest of the device. The

circuit will accurately track position as long as the shaft acceleration is limited to 160,000 degrees/sec
2
,

(444.4 rev/sec
2
), or less. Battery life is a minimum of 10 years in the absence of power. The battery cannot

be replaced in the field.
Status LED’s
Each SMD17K has two status LED’s that shows the status of the functional
status of the device. As shown in figure R1.3, these LEDs are located on the
rear cover. They are named “RUN” and “ERR”. Two additional LEDs are
located on the near cover between the two network connectors. These two
LEDs are the LINK/ACT LEDs for the Ethernet ports. They are on when there
is a physical connection between the device and the previous or next device in
the network. They blink when data is being transmitted over the network.
Run LED
The green RUN LED indicates the logical state of the device.
Table R1.3 Module RUN LED States
LED State Description
Off Device in the EtherCAT Init state
Fast Blink
(4 Hz)
Device in the EtherCAT Pre-Operational (Pre-Op) state
Slow Blink
(1 Hz)
Device in the EtherCAT Safe-Operational (Safe-Op) state
Steady Green Device in the EtherCAT Operational (Op) state.
Figure R1.3 SMD17K
Status LED’s
OUT
POWER & INPUTS
ERR
RUN
IN
Power: 24 to 48 Vdc