Maxiflex T2 CPU User Manual
28
-© Omniflex
UMM124XBR04.pdf
6. I/O Module Management & Scanning Explained
The T2 CPU automatically identifies the I/O module types installed in a Maxiflex system.
This information is used for two purposes:
1. Checking of the presence of the correct I/O modules in a system.
2. Automatic scanning of these I/O modules.
6.1 The I/O Module Manifest
You can configure a T2 CPU with the required list of I/O modules for the system. This list is
called the I/O manifest.
Once an I/O manifest has been configured, the CPU will continuously monitor the presence
of the I/O modules against this list, and report any discrepancies.
This information is available in the DIT for monitoring by a remote device, and by indication
on the front panel of the CPU.
6.1.1 Configuring an I/O Manifest using Omniset
There are two ways to configure a T2 CPU with the required manifest:
6.1.1.1.
Automatic Manifest Configuration
To configure the T2 automatically, follow this procedure:
1. Power up the system with the required I/O modules installed in their correct
positions.
2. Select the “Setup I/O Manifest” Group in OMNISETor DITview.
3. The Manifest table as stored in the dvx file will be displayed.
4. Press the “Read Current Group” button to read the CPU’s current status to the
screen.
5. Check the first item in the group – the I/O Manifest Key. Change this key to
“Unlocked” if it is “Locked”.
6. Press the “Write Current Group” button to write the “Unlocked” value to the T2
CPU.
7. Wait for a few seconds for the T2 CPU to update its information and then press
the “Read Current Group” button. Changing the value of this item to “Unlocked”
causes the T2 CPU to automatically adjust the manifest table to reflect the
currently installed I/O modules. Check that the list matches the modules
installed in the system and is the required list of modules.
8. Change the I/O Manifest Key back to “Locked”, and press the “Write Current
Group” button to write this information to the T2 CPU. This then freezes this list
of modules in the manifest table.
6.1.1.2.
Manual Manifest Configuration
To configure the T2 manually follow this procedure:
1. Select the “Setup I/O Manifest” Group in OMNISETor DITview.
2. The Manifest table as stored in the dvx file will be displayed.
