Rockwell Automation 1734-VHSC24 Very High-Speed Counter Modules User Manual - Manual (Page 36)

Publication 1734-UM003B-EN-P - August 2000
3-6 Very High-Speed Counter Module Input and Output Data
Pulse Width Modulation (PWM) Value (Output Word 3)
When the module is programmed for a PWM [3] configuration, the
time base is enabled, the counter rollover, which is defined as the 1st
ON and 1st OFF value for the respective channel is used. Ties can be
used to direct the PWM signal to any or both outputs. The range of
PWM values is 0
≤ value ≤ 9500 decimal (0.00% ≤ value ≤ 95.00%).
Entering a value below 0 results in a PWM of 0%; a value greater than
9500 results in a PWM of 95.00%. The actual duty cycle observed at
the output depends on the turn on and turn off times of the MOSFET,
the energy storage capability of the cable/load and the resistance from
output to return.
Configuration Data The following represents the configuration data used by the
1734-VHSC24 module.
Counter Configuration (Configuration Word 1)
Use this byte to select the type of counter desired.
07 06 05 04 03 02 01 00
ZI MD CF Counter 0
0 0 0 0 Counter
0 0 0 1 Encoder X1
0 0 1 0 Encoder X2
0 0 1 1 PWM
0 1 0 0 Encoder X4
0 1 0 1 Period/Rate
0 1 1 0 Continuous/Rate
0 1 1 1 Rate Measurement
0 0 0 Store Count Disabled
0 0 1 Mode 1 - store/continue
0 1 0 Mode 2 - store/wait/resume
0 1 1 Mode 3 - store, reset/wait/start
1 0 0 Mode 4 - store, reset/start
1 0 1 Reserved
1 1 0 Reserved
1 1 1 Reserved
0 Z input - 0 = not inverted
1 Z input - 1 = inverted