Black Box GEH-6510 manual Standard Data Organization, Data Types

t represents the type of data, if there are any special conventions. See the following section “Special Naming Conventions” for details.

-b represents the reading of individual bits. Not present if reading whole registers or an array of registers. See the following section “Individual Bits in Registers” for details.

R <f> <[X]nnnn> [t] [A] [lll] [-b]

A indicates that the data is an Array. See the following section “Register Array Format” for details.

lllprovides the length of the array or ASCII string in bytes, This field is present only if the address represents an array or an ASCII string. Leading zeros are not required for this field.

Standard Data Organization

Data is organized according to data type, numeric range, tag type, and access type.

Data Types

There are four data types typically used by the GE devices. These four data types are the possible values for ‘f’ in the address. (Each data type is organized in a separate table for each device in this manual):

1.Dynamic Value

2.Setpoint

3.Command Coil

4.Fixed Value

Each data type is assigned a range of register numbers, tag type, and access as shown below:

Data Organization

Data	Use	Register	Register	DDE	Type of
Type		Range	Range	Tag	Access
		(hex)	(decimal)	Type
Command	1. Commands a device to take	R0X0000 –	R00000 –	Discrete	Read and
Coil	action.	R0XFFFF	R09999		Write
	2. Reads the status of an
	action or discrete input.
Dynamic	Read frequently, such as	R3X0000 –	R30000 –	Analog	Read Only
Value	metering values which change	R3XFFFF	R39999
	constantly
Fixed	Read only once at power-up.	R4X0000 –	R40000 –	Analog	Read Only
Value	Info such as Product ID and	R4XFFFF	R49999
	configuration options
Setpoint	Read infrequently	R4X0000 –	R40000 –	Analog	Read Only
		R4XFFFF	R49999

DDE Server User’s Guide Appendix A – Register Addressing Conventions • 81