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
277
I/O Modbus Slave
UDP Unicast Example
For an example of the I/O UDP unicast, see the sample program, ioudpbcast.c, found on your CD-
ROM.
I/O Modbus Slave
If you have a Modbus serial or TCP application, it can access I/O connected to the IOLAN when the
I/O Global Modbus Slave is enabled. You must supply a unique UID for the IOLAN, as it will act as
a Modbus Slave.
There are three ways your Modbus Application can connect to the IOLAN to access I/O.
Modbus Serial Application Connected to the Serial Port
Your Modbus serial application can be connected right to the IOLAN serial port to access I/O.
IOLAN
Serial
PC running a
Modbus Serial
Application
UID: 15
I/O Digital
Output
Power
perle
Modbus Serial Application Connected to the Network
If you want to access the I/O from a LAN connection, you can install TruePort on the PC running the
Modbus serial application as described in
TruePort I/O on page 283 and connect to the IOLAN over
the network.
Network
IOLAN
perle
PC running a
Modbus Serial
Application
UID: 15
I/O Digital
Output
Power