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
Configuring Modbus
334 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
Modbus Gateway Settings
The scenarios in this section are used to illustrate how the IOLAN’s Modbus Gateway settings are
incorporated into a Modbus device environment. Depending on how your Modbus Master or Slave
devices are distributed, the IOLAN can act as both a Slave and Master Gateway(s) on a multiport
IOLAN or as either a Slave or Master Gateway on a single port IOLAN.
Modbus Master Gateway
The IOLAN acts as a Master Gateway when the Modbus Master is connected to a serial port on the
IOLAN. Each Modbus Master can communicate to UIDs 1-247.
IOLAN
Network
EIA-232
EIA-422/485
TCP
Modbus Slave
Modbus Slave
Modbus Slave
Modbus Master
Master Gateway
Modbus Master
Serial
Modbus Slave Gateway
The IOLAN acts as a Slave Gateway when the Modbus Master resides on the TCP/Ethernet network
and the Modbus Slaves are connected to the serial ports on the IOLAN. Note: The IOLAN provides a
single gateway to the network-attached Modbus Masters. This means that all Modbus Slaves attached
to the IOLAN’s serial ports must have a unique UID. Multiple Masters on the network can
communicate with these Modbus Slaves. Note: If a transaction is in progress to a Modbus Slave,
other requests to that same device will be queued until that transaction is complete.
IOLAN
Network
EIA-232
EIA-422/485
TCP
Modbus Slave
Modbus Slave
Modbus Slave
Modbus Master
Slave Gateway
Modbus Master
Modbus Slave
Serial