Instruction manual

47
o Read Function: Allows selection of the Modbus “read” function
code that will be used to read from the designated register. The
default setting of “Read Holding Registers” (Modbus function code
03) will access a holding
register on the remote device. By
selecting “Read Input Registers” (Modbus function code 04), a
Modbus input
register will be accessed instead.
• Modbus Slave
:
o Register: The register
(accessible as either a holding
register or input register)
number assigned to this point.
• Ethernet/IP
: Note that these attributes
are currently unused and can therefore
be ignored.
o Help
: User defined help text,
up to 24 chars.
o Units
: User defined
engineering units text, up to 5
chars.
o Data Type
: The data type of
this point.
o Maximum
: The max value of
this point.
o Minimum
: The min value of
this point.
o Default
: The default value of
this point.
o Multiplier
: The multiplier of this point.
o Divider: The divider of this point.
o Offset: The offset of this point.
o Precision: The precision, in decimal places, of this point.
o Scaling: Checking this box tells this point to use (value x
multiplier)/divider + offset to determine its actual value.
o Read only
: Defines this point as read only when checked.
15.9 Upload Port and Point Configuration
Once all desired changes have been made to the port and point configurations,
this data must be uploaded to the ETH-200. This is performed by clicking the
“SUBMIT” button shown in Figure 26.