Omron GRT1 - 27-11-2006 Operation Manual page 68

Setup the GRT1-PRT Configuration
Defining the I/O
Configuration
1,2,3...
Example
To define the I/O configuration, perform the following steps.
1. First select the COM status module (top of the list of available modules) by
selecting and double-clicking the mouse using the left button. This module
must always be selected first.
2. Next select the individual I/O modules in the same sequence as they are
physically connected to the GRT1-PRT. Observe the following.
• Digital Units occupy 2 or 4 bits of I/O data. Adjacent digital Input Units
or Output Units must be assembled in to 1 word.
• To assemble multiple Digital Units, first select the appropriate Unit list-
ed in the available Modules list, which is not marked with a aster-
isk.This will indicate the start of a new word. For the subsequent units
the I/O modules marked with an asterisk must be selected until a word
has been filled up.
• When using digital input (or output) units after an analog input (or out-
put unit), a new word has to be allocated. Select a module which is not
marked with an asterisk
• After a word has been filled up, a new word must be started by select-
ing again the next I/O module not marked with an asterisk.
• Do not attempt to put Input Units and Output Units in one and the same
word. This will result in a parameterization error, after downloading the
configuration to the Master Unit.
• Analog Units (e.g. GRT1-AD2 or GRT1-DA2V) occupy 1, 2 or 3 words.
To further explain the mapping sequence, an example is given below.
To illustrate how the Digital and Analog SmartSlice I/O Units are mapped on
to I/O words, and how to implement this using the GSD File, consider the table
below:
SmartSlice Unit
GRT1-PRT COM Status
GRT1-ID4 GRT1-ID4
GRT1-ID4 GRT1-ID4 *
GRT1-OD4 GRT1-OD4
GRT1-ROS2 GRT1-ROS2 *
GRT1-ID4 GRT1-ID4 *
GRT1-AD2 GRT1-AD2
(I: Analog Data) Default
The table above lists the physical configuration in the left most column, the I/O
Module selected for from the list of available I/O modules in the middle and
the I/O words on to which the modules are mapped in the right-most column.
Selected I/O Module
Input Word #1
Input Word #2 / Bit 0 ~ 3
Input Word #2 / Bit 4 ~ 7
Output Word #1, Bit 0 ~ 3
Output Word #1, Bit 4~ 5
Input Word #2 / Bit 8~ 11
Input Word #3 and #4
Section 3-3
I/O Word/Bit
49