4. Configuration
99
Figure 4-14. MODBUS Master Data Requests Screen
Configuration
Description
Default
Value
Options
Function Code
MODBUS function type
-
FC01
– Read Coils
FC02
– Read Input Status
FC03
– Read Holding Registers
FC04
– Read Input Registers
FC05
– Write Coil
FC06
– Write Register
FC15
– Write Multiple Coils
FC16
– Write Multiple Registers
FC22
– Register Write Mask
FC23
– Read/Write Multiple Registers
Polling (ms)
Communication period (ms)
-
0 to 3600000
Read Data Start
Address
Initial address of the
MODBUS read data
-
1 to 65536
Read Data Size
Size of MODBUS Read data
-
Depends on the function used
Read Data Range
MODBUS read data address
range
-
0 to 2147483646
Write Data Start
Address
Initial address of the
MODBUS write data
1
1 to 65536
Write Data Size
Size of MODBUS Write data
-
Depends on the function used
Write Data Range
MODBUS write data address
range
-
0 to 2147483647
Diagnostic
Variable
Diagnostic variable name
-
Name of a variable declared in a program
or GVL
Disabling Variable
Variable used to disable
MODBUS relation
-
Field for symbolic variable used to disable,
individually, the configured MODBUS
requests. This variable must be of type
BOOL. The variable can be simple or an
array element and can be in structures.
Table 4-51. MODBUS Master Relations Configuration
Notes: