Nematron Pointe Controller - Manual (Page 260)

Appendix A: OptiLogic Technical Specifications Pointe Controller User Guide
258
A.9 OL2252 Dual Pulse Counter
The OL2252 module provides two independent high
speed pulse counter inputs. Each input counter will
accurately count pulse inputs up to 15KHz. Inputs may be
sourcing or sinking type. There are a number of operating
options available with the OL2252. The six remaining
inputs can be used as predefined control signals or as
general purpose inputs. These options are detailed below.
Input Connections
The following is a list of the input connections on the module:
Terminal Label Description
1 Common Sourcing or sinking return line
2 Common Sourcing or sinking return line
3 Pulse 1 Square wave input, up to 15 KHz
4 Pulse 2 Square wave input, up to 15 KHz
5 Reset 1 If configured as “reset” input, will clear the Pulse 1 count
when activated. If not configured as “reset” input, can be
used as a general purpose input.
6 Reset 2 If configured as “reset” input, will clear the Pulse 2 count
when activated. If not configured as “reset” input, can be
used as a general purpose input.
7 Enable 1 If configured as an “enable” input, enables the Pulse 1
counter when active. If not configured as an “enable” input,
can be used as a general purpose input.
8 Enable 2 If configured as an “enable” input, enables the Pulse 2
counter when active. If not configured as an “enable” input,
can be used as a general purpose input.
9 Input 1 General purpose input
10 Input 2 General purpose input
Theory of Operation
The OL2252 Pulse Counter has two independent pulse counter inputs. These pulse
counter inputs will accurately co
unt pulses between 0 and 15KHz.
All counts begin at zero and count up to the maximum number the counter can
hold (4,294,967,295). If the count should ever get that h
igh, it will roll over to
zero.
In order to count, the count input must be enabled. A message with an enable
must come from the runtime program. The module can also be set up to use the
local hardware input enable (in addition to the enable message).