Black Box GEH-6510 - Manual (Page 86)

DDE Server User’s Guide Appendix A – Register Addressing Conventions •••• 83
Individual Bits In Registers
Individual bits in registers are read-only. They can be read as discrete/integer tags by
using the following notation (explained beneath):
R indicates a Register
address follows.
f indicates the
register type.
X indicates an address is
hexadecimal. If the X is not present,
the address is read as decimal.
nnnn is the actual address. Four
characters are required, so leading
zeroes must be used if necessary.
For example, the correct syntax is
0025 rather than 25.
D stands for Discrete type
specifier, and indicates that bit
data is being requested.
L indicates the specific
number of bits being
requested.
B indicates the
starting bit
number.
R <f> <[X]nnnn>DL-B
Examples
Register
Number Represents
R40001D1-0 Specifies least significant bit of first holding register
R30008D1-15 Specifies most significant bit of an input register
R40001D2-5 Specifies 6 th and 7 th from the least significant bit of first holding
register.