Page 5–8 Stellar
®
SR55 Series Soft Starter User Manual – 1st Ed, Rev F – 09/18/2019
Chapter 5: Communications
neTWork CommuniCaTions – eTherneT/ip and modbus TCp (ConTinued)
CommuniCaTion module fronT panel indiCaTor lighTs
fronT panel indiCaTors
Location of Front Panel Indicators
Item Front Panel Diagram
1 Network Status LED
2 Module Status LED
3 Network Interface, Port 1
4 Network Interface, Port 2
5 Link/Activity Port 1
6 Link/Activity Port 2
Network Interface LED
LED State Description
Off No link, no activity
Green Link established (100 Mbit/s)
Green, flickering Activity (100 Mbit/s)
Yellow Link established (10 Mbit/s)
Yellow, flickering Activity (10 Mbit/s)
Network Status LED
LED State Description
Off No power or no IP address
Green Online, connections active
Green, flashing Online, no connections active
Red Duplicate IP, fatal error
Red, flashing Connection timeout
Module Status LED
LED State Description
Off No power
Green Controlled, Run state
Green, flashing Not configured or idle state
Red Major fault
Red, flashing Recoverable error(s)
modbus Tcp NeTWoRk commuNIcATIoNs
The SR55-CM-MODTCP Modbus communication module offers the following functionality:
•
Dual switched RJ45 communication ports
•
256 bytes of I/O data in each direction
•
100 Mbps full duplex
•
Supports 4 simultaneous (master) connections
All Modbus functions and addresses that are available in the preceeding “Modbus Serial
Communications” section of this chapter are also available via modus TCP.
SR55 uses Protocol Addressing (Base 0); not PLC Addressing (Base 1). If you are not using
the correct selection, all the addresses will be off by 1. Recommended test: monitor a non-
critical parameter such as Start Time (address 7104), then manually change the value on the
touchscreen and verify that Modbus master actually sees the correct changes.