Delta RMC151 - Manual (Page 1036)

RMC70/150 and RMCTools User Manual
Every register in the RMC can be addressed as either an L or F file register. Typically, it
only makes sense to address REAL registers in the RMC as F file registers, and address
DINT or DWORD registers as L file registers.
Since the only AB PLC at the time of this writing to support L files is the MicroLogix, you
may have to set up the DF1 communications on your host system as if the RMC were a
MicroLogix if you wish to use L file addressing.
Internal versus External Data Types
Notice that some registers have different data types depending on whether they are
accessed from user programs or externally, such as from a PLC. The RMC150 Register
Map and RMC70 Register Map topics list the external and internal data types of the
registers.
Addressing Individual Bits
Some RMC registers contain individual bits that you may wish to address. The DF1
address format for a specific bit is shown below. Notice that many host controllers cannot
address individual bits in an F file.
Fn.x/b or Ln:x/b, where n and x are defined above, and b = bit number.
Note:
The RMC does not support reading or writing of individual bits. You must read or write an
entire 32-bit word. Some HMIs allow individual bit addressing as described above, but still
read the entire word.
Example
The user would like the address for the Enable Output Status Bits on axis 0. Then,
n = 8, the file number for Axis 0 Status registers,
x = 0, the number of the Status Bits register,
and
b = 7, the bit number for the Enable Output bit.
Therefore, the address is F8:0/7 or L8:0/7.
Discrete I/O
Discrete I/O are mapped to the Discrete I/O registers and can be addressed by
addressing the bits in the register. See the RMC150 DI/O and RMC70 DI/O register map
topics for the addresses of the I/O.
Example
For the RMC70, F23:0/5 references the state of discrete I/O point 5.
For the RMC150, F47:6/3 references the state of discrete input 3 in slot 0.
Register Addresses in Integer Format
Occasionally, an addresses may need to be represented in integer format. This section
describes how to convert register addresses from the standard register representation to
an integer.
RMC addresses are normally represented in the following Data Type:
Fn:x, where n = File number, and x = Element number.
Use the following equation to convert a register address to integer format, N:
N = n * 4096 + x
Example
Register address F8:33 is 8*4096 + 33 = 32801.
1016 Delta Computer Systems, Inc.