ELC Programming Manual
For more information visit: www.eaton.com MN05003003E
-2
A. ELC processor communications
This chapter describes the communications capabilities that are built in to the ELC processor
modules.
A.1 Communication Ports
The ELC-PB/PC/PA/PH/PV and the ELCB-PB models have 2 communication ports:
COM1: is an RS-232, slave only communication port. It is the primary port for ELC programming
or for connectivity to an HMI panel.
COM2: is an RS-485 port that can be configured as either a master or slave.
Both COM1 and COM2 ports can be independently configured for Modbus ASCII or Modbus RTU
protocol support.
The ELCM-PH/PA models have 3 communication ports:
COM1: is an RS-232 communication port. COM1 can be configured as either a master or slave
port. It is the primary port for ELC programming.
COM2/COM3 port: RS-485 communication port. COM2/COM3 can be independently configured
as either master or slave ports.
All three of the ports COM1, COM2 and COM3 can be independently configured to support
Modbus ASCII or Modbus RTU transmission modes.
Communication port summary:
COM
Parameter
RS-232
(COM1)
RS-485
(COM2)
RS-485
(COM3)
ELC-PB/PC/PA/PH/PV,
ELCB-PB Baud rate
110~115200 bps -
ELCM-PH/PA Baud rate 110~115200 bps 110~921,000 bps
Data length 7~8bits
Parity Even/Odd/None parity check
Stop bits length 1~2 bits
Configuration Register D1036 D1120 D1109
ASCII mode
RTU mode
ELC-PB/PC/PA/PH/PV,
ELCB-PB: Slave only
ELCM-PH/PA: Selectable for
Master or Slave
selectable for Master or Slave
Data length for access
(ASCII)
100 registers
Data length for access
(RTU)
100 registers
To Next Page
Loading...
