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NextMove e100 / controller

 

User

 

MicroFlex e100

 

supply

 

 

 

 

 

‘X11’

24V

 

 

UDN2982

 

 

‘X3’

 

9

USR V+

 

 

 

 

 

 

 

 

 

Mint

 

 

 

 

OUTX.0

DOUT0

 

DIN1+

 

1

 

16

10k

USR

 

DIN1-

6

 

 

 

 

 

 

TLP115A

10

GND

 

 

 

Shield

 

 

 

 

10

 

User

 

 

 

 

supply

Connect overall

 

GND

 

shield at one end only

Figure 29 - Digital input - typical connection from a Baldor NextMove e100

5.2.4 Special functions on inputs DIN1 and DIN2

DIN1 and DIN2 can be configured to perform special functions.

5.2.4.1Fast position capture

DIN1 or DIN2 can be configured using the FASTSELECT keyword to become a fast latch input. This allows the position of the axis to be captured in real-time and read using the Mint keyword FASTPOS. or FASTENCODER. The input can configured using the FASTLATCHEDGE keyword to be triggered either on a rising or falling edge. Further control of position capture is provided by the

FASTLATCH and FASTLATCHMODE keywords.

The maximum latency to read the fast position depends on the feedback device. For an incremental encoder, the latency is approximately 150 - 300ns. For other feedback devices latency may be up to 62.5µs, resulting from the 16kHz sampling frequency used for these types of feedback device. The fast interrupt will be latched on a pulse width of about 30µs, although a width of 100µs is recommended to ensure capture. To prevent subsequent inputs causing the captured value to be overwritten, the interrupt is latched in software.

Note: The fast inputs are particularly sensitive to noise, so inputs must use shielded twisted pair cable. Do not connect mechanical switches, relay contacts or other sources liable to signal ‘bounce’ directly to the fast inputs. This could cause unwanted multiple triggering.

5-8 Input / Output

MN1942

Page 58
Image 58
Baldor E100 manual Special functions on inputs DIN1 and DIN2, Fast position capture