User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
7.8.4.
Logical Channels - Modbus mode
Modbus
mode allows the user to configure the logical channel to:
–
read/write the data from/to a SLAVE device transmitted over RS-485 Modbus RTU
(MultiCon device in
MASTER
mode),
–
read/write the data from/to the logical channel of MultiCon device transmitted over
RS-485 Modbus RTU (MultiCon device in SLAVE mode) or by Ethernet port (Modbus
TCP/IP, MultiCon device in
SLAVE
mode)
This data stored in the logical channel in the
Modbus
mode can be displayed on the screen,
processed by other logical channels (e.g. by a mathematical function or virtual relay) or it can
be the data source for controlling an output.
Fig. 7.52. Sample Logical channel setting in Modbus mode
The parameters of the
Logical channel
in the
Modbus
):
–
Name
- it gives the name to the logical channel,
–
Unit
- to create a unit use the
Scaling
parameter in the
Processing
parameter block
(more information see
Chapter 7.8.1. Logical Channels - General settings
–
Mode=Modbus
- in this parameter the user selects the source type of data for
the logical channel,
–
Port
- this parameter allows the user to select a serial/ethernet port from the list. The
basic version of MultiCon has one built-in RS-485 port. The number of serial ports
can be increased by installing a communication module into slot D of the device.
This module offers 2 additional serial ports (one RS-485, and one RS-485/RS-232)
99
Port MB1, Multicon in MASTER mode for this port
Modbus address: '1', Device name: "SCK-10"
Input channel number: '1', HOLDING Register: '1h', size: 'b.0-15':
disabled
Hardware input
Hardware output monitor
Modbus
Set point value
Math function
Controller
Profile/timer
Profile/timer (cycle counter)
Date from other channel
Mode
Logical channel
Device configuration
MENU