Delta RMC151 - Manual (Page 340)

RMC70/150 and RMCTools User Manual
A BOOL number in the RMC is a single bit. In the RMC, a single bit cannot exist by itself. It is
always a part of a of a DWORD value. For details on creating a boolean variable, see the
Boolean Variables topic.
Addressing a BOOL Value
In an expression entered in RMCTools:
A boolean number can be addressed in the following ways in an expression. Notice that
within the RMC, individual bits cannot be addressed using the DF1 or Modbus/RTU
addressing formats.
Tag name: Add a period ( . ) and the bit number or name after the tag name of the
register. The register must be a DWORD type.
Examples: MyVariable.0 Note: MyVariable must be a
DWORD
_Axis[0].StatusBits.InPos
_Axis[0].StatusBits.13
IEC addressing: Add a period ( . ) and the bit number after the IEC address of the
register. The register must be a DWORD type.
Examples: %MD8.1.12 - bit 12 in the Error bits register
%MD56.10.16 - bit 16 in the variable 10
From a host controller:
When communicating with the RMC from an external host controller, to address a bit, you
must specify the bit in the register that contains it. Not all host controllers allow this,
depending on the protocol. For example, addressing a bit in an F file using an Allen-
Bradley protocol is not supported in many HMIs.
Typically, specifying bits in any word is possible with most controllers using Modbus/RTU
or Modbus/TCP. Notice that you may need to address the upper 16-bit portion of the 32-
bit register in order to pick out the bits higher than 15.
5.12.3. DINT Data Type
A DINT number in the RMC is a signed 32-bit integer number. When typing a DINT
number in an expression, it should not include a decimal point, or it may be interpreted
as a REAL.
For details on creating a DINT variable, see the Variables topic.
5.12.4. DWORD Data Type
A DWORD number in the RMC is a 32-bit string of bits. In RMCTools, DWORDS are displayed
with a "16#" or "0x" prefix. For example, 16#1A0002Af.
Each bit in a DWORD data type is a boolean (BOOL data type) and can be individually
addressed by adding "." and then the bit number.
Example: MyDWordVariable.12 is a boolean.
Bit Ordering
DWORDs are displayed in RMCTools with the highest byte first. For example, in
16#80000000, bit 31 is set. 16#00000001, bit 0 is set.
320 Delta Computer Systems, Inc.