InteliDrive Lite - 1.2.1 Global guide
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6.2.3 Modem connection
PC can be connected to the controller also remotely via modems. Either an analog, GSM, ISDN or 3G modem
must be connected to the RS232 interface. Setpoint
Group: Comms settings (page 121)
: COM1 Mode has to
be set to MODEM.
Note:
RF modem communication is also possible between controller and remote display.
Note:
In case of controller and remote display RF modem should be connected with serial cable with only three
connected pins Rx, Tx and GND. In other case could be blocked communication between modem and
controller.
6.3 Modbus connection
Modbus protocol was implemented into the controllers to allow design of own supervison software ofr customer
or to use ComAp SCADA software.
Note:
To learn more about Modbus interface see the training videos on
6.3.1 Modbus step by step
Use LiteEdit: Controller->Generate Cfg image->Modbus registers command to get registers list.
9600 bps, 8 data bits, 1 stop bit, no parity
Transfer mode RTU
Function 3 (Read Multiply Registers) max length of block is 127 registers
Function 6 (Write Single Register)
Function 16 (Write Multiply Registers) max 16 registers
The response to an incoming message is sent with minimum 4.096 ms delay after message reception
The complete description of Modbus communication protocol can be found in Modbus Protocol Reference
Guide PI-MBUS-300 and Open Modbus Specification Release 1.0. Both documents are available from web site
at
http://www.modicon.com/openmbus/
.
1. Connection
2. Setpoints
3. Communication
Direct RS232
Direct RS485
Remote modem
Ethernet IB-NT
Ethernet IB-Lite
Comms settings:
COM1 Mode / COM2 Mode
ModbusComSpeed
Request
Response
Practical example:
Request: 01 03 00 35 00 03 15 C5
01
= Controller address
03
= Modbus function code (Read Multiple Registers)
00 35
= Register address: Register number (40054) – 40001 = 53 DEC => 35 HEX IL-NT
Register address: Register number (40061) – 40001 = 60 DEC => 3C HEX IC-NT
