I/O Scanner
Original instructions
About us
Introduction
The functionality of your Ethernet module is further enhanced by the addition of an I/O Scanner, which you can configure with the Schneider Electric programming panels.
I/O Scanner Features
NOE version 3.5 and later include these enhancements:
Feature
Availability
Improvement
Description
Improved Timeout and Retry Transmission algorithm
Control Expert
Concept
ProWORX
Improves TCP connection management
2004 version uses a variable timeout. Older versions used a fixed timeout.
Difference: Faster retransmission rates
Enable/Disable I/O Scanner entry
Control Expert
Concept
Reduces network traffic volume
Use the ‘Device Control Block’
  • Set = 0 Enable channel for normal data exchange
  • Set = 1 Disable channel
Note: Concept Users
Concept uses diagnostic words.
Set = FF Disable channel
Send Modbus requests across a router
Control Expert
Concept
ProWORX
Allows routers to connect remote I/O devices to a controller
Automatic
Dynamic TCP port allocation
Control Expert
Concept
ProWORX
Improves connection/disconnection performance
Reserves TCP client ports 3072 (0xC00) through 4992 (0x1380)
Allocates ports dynamically
Repetitive rate display
Control Expert
Check status using GUI
Status displays in I/O Scanning tab of module editor
I/O Scanner Parameters
Functionality of the I/O Scanner.
Parameter
Value
Max. No. of Devices
64: 140 NOE 771 00 (Version 2.2 or earlier)
128: 140 NOE 771 00 (Version 3.0 or later), 140 NOE 771 01, and 140 NOE 771 11 only
128: HE CPU 651 x0
Max. No. of Input Words
4000
Max. No. of Output Words
4000
Health Timeout Value
User configured: 1...65535 ms in 1 ms increments
Last Value (Input)
User configured (zero or Hold)
IP Address
User configured
IP address of scanned device (Slave IP)
Local and Remote Register Reference
User configured
Repetitive Rate
User configured: 0...65535 in multiples of:
  • 16 ms, for 140 NOE 771 x1
  • 10 ms, for 140 CPU 651 x0
Unit ID
User configured
Configure ID only if using a bridge
Operation through a bridge
Modbus bridge: Supported
Modbus Plus bridge: Supported
Gateway/Bridge Device
Select the check box if you are using a bridge or a gateway device.
The I/O Scanner Concepts topic explains how to configure the I/O scanner.
Performance
Performance data details are provided at I/O Scanner Response Times topic.