SMAR MB-700, User Manual

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MB-700 – User’s Manual
5.16
Figure 5.18 - MB-700 working as Peer-To-Peer in the Serial and TCP/IP
MB-700 as a TCP/IP Modbus Slave
1 - MB-700 working as Concentrator
The MB-700 module would operate as a Serial/TCP Modbus concentrator and can also work as
TCP Slave of the Concentrated Dynamic Data into its CCSM Block.
The Device Slave Address (ID Modbus) is defined in the DEVICE_ADDRESS parameter of the
Concentrate Configuration Block (CCCF).
The Modbus address of the parameter to be monitored is fixed for each CCSM Block and depends
on the block instantiation (it is indicated in the STRATEGY parameter).
To provide the redundancy, the MB-700 Blocks must answer like Slave Modbus as Active and also
as Standby.
Modbus Address Calculation
Each block has a fixed range of Modbus Addresses, which is defined following the form:
Modbus_Addr = Modbus_star (offset * n)
Where:
n –STRATEGY parameter of the CCSM block (indicate the block instantiation)
For the following configuration:
o
MB-700
o
CCSM1
o
CCSM2
o
CCSM3
o
CCSM4
The Modbus Address of the BVALUE[1] parameter of the CCSM4 block would be:
Modbus_start_addr – BVALUE[1] = 1001
CCSM block Offset = 200
CCSM.Strategy = 3 (fourth SM block in the configuration)
Modbus_Addr = 1001 + (200 * 3)
Modbus_Addr = 1601