6.5.5
Modbus master
6.5.5.1
Introduction
The device can act as a configurable Modbus master, for Modbus/TCP. Up to 5
independent slaves can be accessed simultaneously.
The Modbus Master does not work with the serial interface (RS-485, Modbus RTU).
Up to 99 analog values can be read into AnalogManager group 54 (“54.01 Mapped AM
value 1” to “54.99 Mapped AM value 99” ) and and up to 99 boolean values can be read
into LogicsManager group 54 (“54.01 Mapped LM flag 1” to “54.99 Mapped LM flag
99” ).
All analog values which are present in the device as AnalogManager values and all flags
which are present as LogicsManager values can be written. Boolean flags can be grouped
into 16 bit values. Reading and writing each can be combined to read/write multiple
values in one command. Different variable types and Modbus modes are supported.
Multiple write and read rates can be defined, in order to access some datapoints more
often than others.
6.5.5.2
Configuration
Woodward offers a ModbusMasterMapper PC software to configure the Modbus Master
behavior for free and enables the device to import, make accessible, and proceed
customer specific settings. The ModbusMasterMapper software can be installed
separately from other Woodward software. After starting the program the HELP file can
guide through the required settings.
Data of the particular easYgen model will be available/selectable:
• AnalogManager variables
•
• LogicsManager variables
•
• the easYgen database (ID based)
•
The according data types, addresses, rates must be defined and each read/write entry
can be commented.
Note: Modbus master has for read and write a limitation of maximum about 120 words.
The ModbusMasterMapper PC software detects an overrun and will issue a warning.
The final protocol can be saved as a mapping file (*.mmap) file for further processing. The
tool creates a *. SCP-file for uploading the Modbus Master control file into the device
using Toolkit. After uploading and restarting the Modbus Master process can be started
via configuring parameter 3219 to “On”. Now the configured communication will be
executed.
820
easYgen-3000XT Series
B37574
6 Application Field
6.5.5 Modbus master
Released