Rockwell Automation 4100 AEC Absolute Encoder Converter Installation - Manual (Page 58)

Publication 4100-UM052B-EN-P - October 2001
50 Strobe Position For Applications Not Using the 1394 or Compact
* Position increment must not exceed the maximum Delta Count rate during Ts1s1.
The count rate is equal to the encoder channel frequency times four (4X encode).
The Strobe (Ts1) must be active for a minimum of 5
µ
s, but less than
5ms to be a valid incremental strobe. When the strobe goes inactive,
the AEC interrogates the transducer position and sends any
incremental change from the previous sample. The time (Ts1pe) to
transmit the incremental position is dependent on the size of the
position increment. The position increment must not exceed the
maximum delta count allowed between consecutive incremental
strobe pulses (Tinc). The period (Tinc) of the strobe must be greater
than 1ms, but less than 10ms. This period is constrained by the
incremental strobe active time (Ts1) and the time to send the position
(Ts1pe).
Incremental Strobe Timing Period
Parameter Min Max
Tinc (Incremental strobe period = Ts1 + Ts1s1) 1ms 60ms
Ts1 (Strobe1 active pulse width) 0.005ms 10ms
Ts1s1 (Time from Strobe inactive to next active strobe) Ts1pe 30000 - Ts1
Ts1pe (Time from Strobe inactive edge to end of position increments) *Maximum Delta Count