Rockwell Automation 1734-IK Encoder/Counter Modules User Manual - Manual (Page 19)

Publication 1734-UM006B-EN-P - August 2005
About the Modules 1-9
Operating Mode Features The following table summarizes which features are active in each
mode:
Operating Mode Features
The Z Gate/Reset Terminall will operate in one of four modes when
the Store Count feature is in use. The following figures detail the
operation in each mode:
• Store/Continue
• Store/Wait/Resume
• Store-Reset/Wait/Start
• Store-Reset/Start
Store Count Mode 1: Store/Continue
In mode 1, the rising edge of a pulse input on the Z Gate/Reset
terminal causes the current counter value to be read and stored in the
Read Data file. The counter continues counting. The stored count is
available in the Stored/Accumulated Count word. The stored count
information remains until it is overwritten with new data.
Store/Continue
Store Count Mode 2: Store/Wait/Resume
In mode 2, the rising edge of a pulse input on the Z Gate/Reset
terminal reads and stores the current counter value in the
Stored/Accumulated Count word and inhibits counting while the Z
Operating Feature Counter
Up / Down Encoder
X1, X2 & X4 Period
/Rate Rate
Measurement
Preset Y Y N N
Rollover Y Y N N
Software Reset Y Y Y Y
Store Count - Z Gate / Reset 4 modes Y Y N N
Scale Input Count at Z Gate / Reset N N Y N
Z Gate / Reset Invert Bit Y Y Y N
Sample Period N N N Y
Read, Store Count,
and Continue Counting