Configuring Hardwired Input Channels - Maretron M-Power CLMD16 Configuration Manual

CLMD16 Configuration Guide___________________________________

Configuring Hardwired Input Channels

The CLMD16 has 11 hardwired input channels. Eight of these channels monitor potential
connections to supply DC voltage, two monitor resistance to DC (-) and one is a current loop
channel that will measure 4-20 mA DC (-) current. Each Input has "High Level" and "Low
Level" thresholds as well as "Hysteresis" levels that are user adjustable to determine what
input statuses are. For example, a user can adjust these thresholds such that a "High Level"
threshold is 8v and "Low Level" threshold is 2v. These settings will translate to; when a DC (+)
input of 8v or greater is detected the input channel is considered within the "High Level"
category, when a DC (+) input of 2v or lower or a DC (-) signal pulling the input channel "Low"
(0v) is detected the input channel is considered within the "Low Level" category. Anything in-
between the "High Level" and "Low Level" categories is considered inside the "Float" category.
The "Hysteresis", in other words, can be considered a buffer on both ends of the threshold
setting. Hysteresis is used to "dampen" the threshold mark disallowing the potential of
nuisance or rapid status switching. For example, using the abovementioned "High Level"
threshold of 8v, if an input voltage of "just about" or "just below" 8v is detected where the input
is fluctuating between under 8v and over 8v the input status will change at the frequency of the
fluctuation. Hysteresis is designed to create a buffer on both ends of the threshold setting to
prevent the potential of rapid status changes. For example, again using the abovementioned
"High Level" threshold of 8v, when a hysteresis of 0.5v is applied to this threshold value the
input status does not change until 7.5v or under and 8.5v or over. Application of hysteresis
creates an environment where status changes to the input are more affirmative.
Once Input types are entered into the Inputs Dialog, the "High Level", "Float" and "Low Level"
detection of each input parameter can be plugged directly into the control input of an ECB or
used as inputs to "Switching Elements" of:
"Counter"
1)
"Flash"
2)
"Latch"
3)
"Logic"
4)
"Timer"
5)
"Toggle"
6)
The names of these input detections are called "Binary Event Low"," Binary Event High", and
"Binary Event Float" numbers 1 – 11, (a number correlating to each Input number) where each
number has "Low", "Float" and "High" detection giving a total of 33 potential signals for the
CLMD16 to act upon related to these 11 inputs and their threshold states being met.
See below the three different CLMD16 Dialogs used for configuring these input types
10
(Voltage, Resistive, and Current Loop).
CLMD16 Configuration Guide Rev.1.1