Black Box GEH-6510 manual Special Naming Conventions, Examples, Long Words and Special Numbers

Examples

Here are some examples of different types of register numbers:

Register	Represents
number
R00005	Coil command, number 5, with Read/Write access to the user
R31005	Dynamic value, number 1005, Read Only access
R43010	Fixed value or Setpoint, number 3010, with Read /Write access
	to the user

Special Naming Conventions

Special handling of data from devices can be done by using the following conventions:

Long Words and Special Numbers

By default, a register item is treated as an unsigned integer. To treat the contents of any register differently, refer to the table below:

Special Data Item	Naming Convention	Example
Unsigned 16-bit Integer	Default	R40001
16-bit Signed Integers with	Append letter I to item number.	R40001I
values between -32,768 and
32,767
32-bit Signed Integers	Append L to item number.	R40001L
(Long Integers)
32-bit floating point numbers	Append F to item number.	R40001F
Modulus 10000	Append E to the item name	R40010E
Used in 32-bit register mode	NOTE: See 3710 and 3720 ACM Modbus Protocol Manuals for
for EPM 3710 and 3720.	details.
ASCII data string	Append S to item number.	R40010S020
	[lll] field immediately after S character represents the number of
	characters to read. If no length is specified ([lll] field is not
	provided), only one register of characters (2 or 4) will be read. The
	High byte represents the first character, and the Low byte represents
	the second character.
	NOTE: No array type is allowed with S data items, nor are ASCII
	strings supported for coil registers.
	NOTE 2: For 16-bit mode devices (most devices) there are 2
	characters per register. For 32-bit mode devices, there are 4
	characters per register.
	NOTE 3: The maximum value for the S string is 250.

82 • Appendix A – Register Addressing Conventions DDE Server User’s Guide