ComAp InteliGen NTC User Manual

Communication Guide, ©ComAp – March 2014 112
IGS-NT Communication Guide 03-2014.pdf
Modbus Protocol Description
 Direct connection:
 RS232, RS485, (I-LB+)
 8 data bits
 1 stop bit
 no parity
 Modem connection
 8 data bits
 1 stop bit
 no parity
 Communication speed:
 9600 / 19200 / 38400 / 57600 bps
 Transfer mode RTU
 Function codes
o 3 (Read Multiple Registers)
o 6 (Write Single Register)
o 10 (Command)
o 16 (Write Multiple Registers)
 The response to an incoming message depends on the communication speed. The delay is not
shorter than the time needed to send/receive 3 and ½ characters.
The complete description of Modbus communication protocol can be found in
http://modbus.org/docs/PI_MBUS_300.pdf
and
http://www.rtaautomation.com/modbustcp/files/Open_ModbusTCP_Standard.pdf.

ComAp InteliGen NTC Specifications

General

Brand	ComAp
Model	InteliGen NTC
Category	Controller
Language	English