Table of Contents
Advertisement
Introduction to Time
Stamping of the Input Data
Chapter Summary and
What's Next
Rockwell Automation Publication 1732E-UM007A-EN-E - August 2016
an RPI because it is not a data-producing member of the system; it is used only as
a bridge to remote modules.
The 1732E-8IOLM12R is an input module that offers sub-millisecond time
stamping on a per channel basis in addition to providing the basic ON/OFF and
OFF / ON detection of all change of state (CoS) input data (also commonly
known as the process data). This IO-Link Master module provides a new
timestamp for any CoS on any of the input data from a configured IO-Link
enabled device. Each IO-Link enabled device can support up to 32 bytes of input
process data partitioned dependent on the manufacturer of the
IO-Link enabled device.
As a result, one timestamp is available for the entire input process data, and using
ladder logic, the user can specify when to capture the timestamp for any particular
data transition.
Most often the data of interest is a Boolean value with instructions such as
"examine if open" and "examine if closed" paired with a one-time instruction to
only capture the transition itself. In this case, the user can accurately collect the
data transition and the time at which it occurred.
Note that only the input data can be timestamped and that this
1732E-8IOLM12R master module does not support time stamping for the
output data.
Time stamping is a feature that registers a time reference to a change in input data.
For the 1732E-8IOLM12R, the time mechanism used for time stamping is (PTP)
system time. The 1732E-8IOLM12R module is a PTP slave-only device. There
must be another module on the network that functions as a master clock.
Note that the input time stamping supports all CoS transitions of input data for
IO-Link and/or discrete input data.
Each of the eight channels has a unique timestamp value which can be seen in the
Controller Tags view.
This is ideal for numerous scenarios such as identifying "output" triggering state
times from the sensor to the controller. Another example would be for identifying
time indication as to when the margin low transition time occurred in the input
data for learning when the "dirty lens" event occurred.
In this chapter you were given an overview of the ArmorBlock I/O 8 Channel
IO-Link Master. In the next chapter you will learn how to install and prepare
your module for configuration.
Introduction
Chapter 1
15
Advertisement
Table of Contents
