ALTUS Nexto NX3004 User Manual

4. Configuration
82
Configuration
Description
Default
Options
Value Variable
Symbolic variable name
-
Name of a variable declared in a program or
GVL
Data Type
MODBUS data type
-
Write Coil (1 bit)
Read Coil (1 bit)
Write Holding Register (16 bits)
Read Holding Register (16 bits)
Holding Register – AND Mask (16 bits)
Holding Register – OR Mask (16 bits)
Input Register (16 bits)
Input Status (1 bit)
Data Initial
Address
Initial address of the MODBUS
data
-
1 to 65536
Data Size
Size of the MODBUS data
-
1 to 65536
Data Range
The address range of configured
data
-
-
Table 4-47. MODBUS Mappings Settings
Notes:
Value Variable: this field is used to specify a symbolic variable in MODBUS relation.
Data type: this field is used to specify the data type used in the MODBUS relation.
Data Type
Size [bits]
Description
Writing Coil
1
Writing digital output
Reading Coil
1
Reading digital output
Writing Holding Register
16
Writing analog output
Reading Holding Register
16
Reading analog output
Holding Register with AND mask
16
Analog output which can be read or written
with AND mask.
Holding Register with OR mask
16
Analog output which can be read or written
with OR mask.
Input Register
16
Analog input which can be only read.
Input Status
1
Digital input which can be only read.
Table 4-48. Data Types Supported in MODBUS RTU Master
Data Initial Address: data initial address of a MODBUS mapping.
Data Size: the size value specifies the maximum amount of data that a MODBUS interface can
access, from the initial address. Thus, to read a continuous address range, it is necessary that all
addresses are declared in a single interface. This field varies with the MODBUS data type
configured.
Data Range: this field shows the user the memory address range used by the MODBUS interface.
Requests Configuration –Symbolic Mapping Settings
The configuration of the MODBUS requests, viewed in Figure 4-17, follow the parameters described
in Table 4-49:

ALTUS Nexto NX3004 Specifications

General

Brand	ALTUS
Model	Nexto NX3004
Category	Processor
Language	English