5. CONFIGURATION
Add and configure MODBUS relations, specifying the variable name, MODBUS data type and data initial address.
Automatically, the data size and range will be filled, in accordance to the variable type declared.
5.5.6.1.1. MODBUS Slave Protocol General Parameters – Configuration via Symbolic Mapping
The general parameters, found on the MODBUS protocol initial screen (figure below), are defined as.
Figure 64: MODBUS RTU Slave Configuration Screen
Configuration Description Default Options
Slave Address MODBUS slave address 1 1 to 255
Table 96: Slave Configurations
The MODBUS slave protocol communication times, found in the Advanced... button on the configuration screen, are
divided in: Task Cycle, Send Delay and Minimum Interframe as shown in figure below and in table below.
Figure 65: Modbus Slave Advanced Configurations
Configuration Description Default Possibilities
Task Cycle (ms)
Time for the instance execu-
tion within the cycle, with-
out considering its own exe-
cution time
50 20 to 100
Send Delay (ms)
Delay for the transmission
response
0 0 to 65535
119
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