Section 3.3 Operating Modes; Section 3.4 Input Configurations - Spectrum Controls SLC 500 User Manual

Section 3.3 Operating Modes

Operational Mode
Single-Ended Input
Single-Ended Up/Down
Quadrature Input
Section 3.4
Input Configurations
Chapter 3: Configuring the 1746sc- CTR4/CTR8
are used to configure input channels 0-4. Each output image word configures a
single channel, sets the preset, limit and scale factors and can be referred to as a
configuration word. Each word has a unique address based on the slot number
assigned to the module.
If you want to configure the third channel on the module located in slot 4 in the
SLC chassis, your address would be O:4.2.
Chapter 4 gives you detailed bit information about the data content of the
configuration word.
Input Image - Data Words and Status Words
Count data, Rate data, and status are given in four input words for each channel.
Chapter 4 gives you detailed bit information about the content of the data word
and the status word.
The module's operating mode determines the number of available counters and
which inputs are attached to them. There are two operating modes, and their
input assignments are summarized in the table below.
Table 3.2. Module Operation Modes
CTR8 (CTR4) Input Channel Configuration
8 (4) Channels: One per input
4 (2) Channels: One Input / One Direction Discrete
4 (2) Channels: Two per input.
Input configurations determine how the 8 inputs cause the counter to
increment or decrement. The four available configurations are:
Uni-Directional (up)
•
Bi-Directional (up and down using two channels)
•
• X1 Quadrature Encoder
• X4 Quadrature Encoder
See the Summary of Available Counter Configurations for the input
configurations available for the counters, based on operating mode.
User's Manual Pub. 0300181-07 Rev. A
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