Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 16)

Publication 1746-UM002B-EN-P - August 2004
1-2 Module Overview
Inputs
The module features six high-speed differential inputs labeled ±A1,
±B1, ±Z1, ±A2, ±B2, and ±Z2. It supports quadrature encoders with
ABZ inputs and/or up to six discrete switches. In addition, x1, x2, and
x4 counting configurations are provided to fully use the capabilities of
high resolution quadrature encoders. The inputs can be wired for
single-ended or differential use. Inputs are opto-isolated from the
backplane.
Outputs
Eight outputs are available, four real (dc sourcing) and four virtual
bits. The virtual outputs are available to the processor only. The real
outputs are protected from overloads by a self-resetting fuse. The
outputs can be controlled by any or all of the counters and/or directly
controlled by the user’s program.
Up to 16 dynamically configurable ranges are available, using rates or
counts to control outputs. The ranges, programmed with range start
and range stop values, can overlap. If the count or rate is within more
than one range, the output patterns of those ranges are combined
(logically ORed) to determine the actual status of the output. When an
output is enabled by more than one counter and/or with the user
program, its output state is determined by logically ORing the
programmed setpoints of all those counters and the user program.
Operation
Module operation is controlled by user-programmed settings in the
following six module programming blocks.
• Module Setup Block
• Counter Configuration Block
• Minimum/Maximum Count Value Block
• Minimum/Maximum Rate Value Block
• Program Ranges Block
• Counter Control Block