Real Time Automation, Inc.
31
1-800-249-1612
Configuring Read and Write Scan Lines
Follow these steps to manually configure Read and Write Scan Lines.
1)
Click the
View Read Scan Lines
or
View Write Scan Lines
button.
2)
Enter a Unit ID for the Client to communicate to.
3)
Select a Point Type for each Scan Line. Options include: Coil Status, Input Status, Input Registers, and
Holding Registers.
a)
Note:
Input/Holding Registers have a data type associated with them.
b)
String Point Type- If the mating protocol supports strings, you may select string as a point type
in Modbus. With this point type, 2 characters will be packed into a single register and the first
register will be set aside for the length.
c)
EX:
4x Hold Reg (String) with a Starting Address of 1 for a length of 5 Registers, this means that
Register 1 will hold the length of the string and Registers 2-5 will hold the string contents. So,
this string can contain a max of 8 characters.
1)
Enter a Starting Address (This will be 1 based, if your device is 0 based then check the Enabled 0-
Based Addressing box).
a)
Note:
Some manufactures documentation may call out the Starting Address as 00001, 10001,
30001 or 40001. Don’t include the first value as this represents (0) coil, (1) Input Status, (3) Input
Register and (4) Holding Register.
Содержание 460ESMC
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