Simex multicon cmc-141, Руководство пользователя

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User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
7.8.11.5. Application of Logical channel in the Modbus mode
See also: Chapter 7.15. MODBUS .
Task:
The task is to read the temperature of the two
SLAVE
devices from the
register 1
, which
is assigned a physical address: '1 ' and '8' .
Solution:
First, configure the device in MASTER mode (like in 7.15.4.1. Input configuration of
Modbus protocol in MASTER mode
), then configure it as follows and connect the SLAVE
device as shown in
Fig. 7.69
.
Fig. 7.69. Schematic diagram for SLAVE devices connected to MultiCon
In first step you need to configure Logical channels which will read data from Slave devices.
To do this:
– touch screen and press the Menu button,
– press the Device configuration button,
– enter
Logical channels
menu,
– using the arrows in the top navigation bar, select any
logical channel
such as 1,
– in
Name
parameter write
Temperature 1
,
– Mode parameter set as Modbus ,
– Port parameter set as MB1 (MASTER) ,
– SLAVE devices parameter set as Addr.1:“Temp. converter” ,
–
Device input
parameter set as
Inp.1:HR 1h,b0-15
that reads
Register 1h
from
SLAVE 1
device,
– Scale parameter set as linear ; in this example we don't need scaling, but it is the
only way to set unit displayed on the screen,
– enter Configure scaling submenu:
• in Output unit write °C ,
• in
Input value
parameter in the
Point 1
section write
0
,
125
Power supply
(depending on version)
1
2
8
5
6
7
3
4
SERVISE
+24V DC ±5%
( I max. = 200mA)
digital input
0/15..24V DC
RS-485
GND
GND
A+
B-
isolated
Master
Device
Slave device 1
Slave address: 1
Register: 1h
Register: 2h
Register: 3h
Baud rate: 9600 bit./sek.
Device name:Temp. converter
Registers:
Modbus settings:
Slave device 2
Slave address: 8
Register: 1h
Register: 2h
Register: 3h
Baud rate: 9600 bit./sek.
Device name:Temp. converter
Modbus settings:
Registers:
GND
B-
A+
Port MB1