Server User Manual
Table Of Contents
- SDS/SCS/STS/MDC User’s Guide
- Table of Contents
- Preface
- Introduction
- Hardware and Connectivity
- Configuration Methods
- Getting Started
- Using DeviceManager and WebManager
- Network Settings
- Configuring Serial Ports
- Introduction
- Serial Ports
- Serial Port Profiles
- Common Tabs
- Console Management Profile
- TruePort Profile
- TCP Sockets Profile
- UDP Sockets Profile
- Terminal Profile
- User Service Settings
- Printer Profile
- Serial Tunneling Profile
- Virtual Modem Profile
- Control Signal I/O Profile
- Modbus Gateway Profile
- Power Management Profile
- Remote Access (PPP) Profile
- Remote Access (SLIP) Profile
- Custom Application Profile
- Port Buffering
- Advanced
- Configuring Users
- Configuring Security
- Configuring I/O Interfaces
- Configuring Clustering
- Configuring the Option Card
- Configuring the System
- Controlling the RPS, I/O Channels, and IPsec Tunnels
- System Administration
- Introduction
- Managing Configuration Files
- Downloading IOLAN Firmware
- Calibrating I/O
- Setting the IOLAN’s Date and Time
- Rebooting the IOLAN
- Resetting the IOLAN to Factory Defaults
- Resetting the SecurID Node Secret
- Language Support
- Downloading Terminal Definitions
- Resetting Configuration Parameters
- Lost Admin Password
- Applications
- RADIUS and TACACS+
- SSL/TLS Ciphers
- Virtual Modem AT Commands
- Pinouts and Cabling Diagrams
- Setting Jumpers
- I/O Wiring Diagrams
- Utilities
- Accessories
- Troubleshooting
- Introduction
- Hardware Troubleshooting
- Communication Issues
- DeviceManager Problems
- Host Problems
- RADIUS Authentication Problems
- Login Problems
- Problems with Terminals
- Unknown IP Address
- DHCP/BOOTP Problems
- Callback Problems
- Language Problems
- Modem Problems
- PPP Problems
- Printing Problems
- Long Reboot Cycle
- SSL/TLS
- I/O Models
- IPv6 Issues
- Contacting Technical Support
- Glossary
- Index
I/O UDP
274 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
I/O UDP
Industrial applications often monitor the status of I/O devices such as sensors, alarms, relays, etc. by
polling for I/O data. The IOLAN’s I/O UDP feature can help to minimize network traffic by
broadcasting I/O status to industrial applications on specified intervals, providing I/O status in a
timely manner.
The IOLAN’s I/O UDP broadcast feature sends the status of attached I/O devices to defined hosts on
the network. Depending upon the IOLAN model and the configuration of the I/O channels, the UDP
packet contains the current status and/or data of each enabled I/O channel or serial pin signal.
UDP Unicast Format
PC applications must be able to interpret the UDP packet to obtain I/O channel status and data. This
section provides the detailed structure of the UDP datagram and its data format.
UDP Broadcast Packet
Versi on
(1 Byte)
Total Packet Length
(2 Bytes)
Analog Section Digital/Relay Section Serial Pin Signal Section
Each section, with the exceptions of the Version and Total Packet Length sections, is comprised of its
own subset of bytes.
Note:
All 2 byte values are in big Endian (network) order. All 4 byte values are IEEE 754 single
precision floating point numbers in big Endian (network) order.
z Version—The current version of the format of I/O UDP broadcast packet.
z Total Packet Length—The total length of the UDP packet.
z Analog Section—The Analog Section of the UDP packet, which contains data/status of the
Analog I/O channels. The Analog Channel Data subsection (within the Analog Section) will only
exist if the channel(s) is enabled.
z Digital/Relay Section—The Digital/Relay Section of the UDP packet, which contains status of
Digital and Relay I/O channels. The Channel Data subsection within the Digital/Relay Section
will always be present.
z Serial Pin Signal Section—The Serial Pin Signal Section of the UDP packet, which contains the
status of the IOLAN’s serial port’s control signal pins. The Serial Pin Signal Data subsection
within the Serial Signal Pins Section will always be present.