InteliLite
NT
AMF26-P, SW version 2.4, ©ComAp – January 2016 134
AMF26-P-2.4 Reference Guide.pdf
Following modules are available for direct connection to PC:
- IL-NT-232
- IL-NT-RS232-485
- IL-NT-S-USB (easy removable USB service module)
The RS232 or USB interface uses COM1 port of the controller. The RS485 uses COM2.
PC software - LiteEdit
On the PC (for direct or modem connection) has to be installed the ComAp’s software package
LiteEdit. (based on Windows 95 or newer platform)
LiteEdit enables:
x read the quantities
x adjust all set points
x control the engine
x configure the controller
x select software configuration
x modify alarm inputs and outputs
x modify password, commands protections
x direct, modem or Internet communication
Modbus protocol
The selection of the function of iL serial port is done via the setpoint COMx Mode in Basic settings
x 57600 bps, 8 data bits, 1 stop bit, no parity
x Transfer mode RTU
x Function 3 (Read Multiply Registers)
x Function 6 (Write Single Register)
x Function 16 (Write Multiply Registers)
x 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/ .
Communication object vs. Register
All the data intended for communication has its representation as communication objects in the
controller. The communication object is represented by the n-byte array in the controller memory and
identified by the unique 16-bit communication object number. The register, according to Modbus
communication protocol, represents a two-byte data and in communication functions is referenced by
16-bit register address. Further in the description of communication functions the communication
object number will always be used as a register address and length of the communication object
will be expressed by number of registers. Just one communication object can be read or written
by one communication function.
Hint:
To obtain communication object numbers it is possible to download the actual controller description
on-line from controller or from (ail) archive and use “export data” function from LiteEdit software.
Communication object list (exported from default IL-NT-AMF26-P archive)
Setpoints of AMF26-P:
IL-NT-AMF26-P-
2.0 R:2.6.2010
IL-NT-AMF26-
AMF26-P-
2.0.AIL
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