Horner APG QX751 OCS - Manual (Page 35)

MAN0890-02-EN CH. 8
August 20, 2009 Page 35 of 96 ECN # 979
CHAPTER 8: HIGH SPEED I/O (HSC / PWM)
8.1
Overview
A QX751 base used with a BP43 provides High Speed I/O. The High Speed I/O includes both a High
Speed Counter (HSC) and a Pulse Width Modulation (PWM) functionality for a variety of standard and
complex applications as shown in Table 8.1.
Table 8.1 – High Speed I/O Applications and Procedural Overview
Input Functions
Application
Counter
1
Counter
2
How?
Totalizer 16 Bits
(1 HSC input)
√
Totalizer 32 Bits
(1 HSC input)
√
Frequency
Measurement
(1 HSC input)
√
1. Choose up to 2 input functions. Perform Built-in High
Speed Configuration Procedures using Cscape Software
(8.6
Cscape Configuration for HSC / Frequency Measurement).
Either configure Counter 1 and 2 as totalizers
or
configure Counter 1 for Frequency Measurement and
Counter 2 as a totalizer
or
configure only one counter depending upon the function
required.
2. Re-assign registers in accordance with the features
chosen in the configuration.
3. Wire the I/O port connector in accordance with the
features chosen in the configuration.
Output Function
Application Counters How?
PWM
(2 PWM Outputs)
10Hz Minimum
Frequency
Not Applicable
1. No Built-in High Speed Configuration Procedures are
required.
2. Assign values into the register map for Duty Cycle and
frequency out. See examples on page
2
38.
3. Wire the I/O port connector in accordance with the
features chosen in the configuration.