C500BC031 Omron, C500BC031 Datasheet - Page 144
C500BC031
Manufacturer Part Number
C500BC031
Description
BACKPLANE
Manufacturer
Omron
Datasheet
1.C500BC031.pdf
(168 pages)
Specifications of C500BC031
Leaded Process Compatible
No
Peak Reflow Compatible (260 C)
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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128
bit address
bit designator
bit number
block
block instruction
block program
buffer
building-block PC
bus bar
call
carry flag
clock pulse
clock pulse bit
condition
The location in memory where a bit of data is stored. A bit address must
specify (sometimes by default) the data area and word that is being ad-
dressed as well as the number of the bit.
An operand that is used to designate the bit or bits of a word to be used by
an instruction.
A number that indicates the location of a bit within a word. Bit 00 is the right-
most (least-significant) bit; bit 15 is the leftmost (most-significant) bit.
Block can refer to one of three aspects of PC operation: a block in the FM
area, a block instruction (program), or a logic block. A block in the FM is the
unit used to transfer data to and from the File Memory Unit and equals 128
words. Refer to block instruction, block program, and logic block for defini-
tions of these.
A special class of instruction used within ladder-diagram programming to al-
low flowchart-like coding, which is often difficult to write with ladder diagrams.
Function codes for block instructions are indicated between pointed paren-
theses <like this>.
A section of program written within a ladder diagram but based on block in-
structions. Block programs can also contain some, but not all, of the lad-
der-diagram instructions.
A temporary storage space for data in a computerized device.
A PC that is constructed from individual components, or “building blocks.”
With building-block PCs, there is no one Unit that is independently identifi-
able as a PC. The PC is rather a functional assembly of components.
The line leading down the left and sometimes right side of a ladder diagram.
Instruction execution proceeds down the bus bar, which is the starting point
for all instruction lines.
A process by which instruction execution shifts from the main program to a
subroutine. The subroutine may be called by an instruction or by an interrupt.
A flag that is used with arithmetic operations to hold a carry from an addition
or multiplication operation, or to indicate that the result is negative in a sub-
traction operation. The carry flag is also used with certain types of shift oper-
ations.
A pulse available at a certain bit in memory for use in timing operations. Vari-
ous clock pulses are available with different pulse widths.
A bit in memory that supplies a pulse that can be used to time operations.
Various clock pulse bits are available with different pulse widths, and there-
fore different frequencies.
An message placed in an instruction line to direct the way in which the termi-
nal instructions, on the right side, are to be executed. Each condition is as-
signed to a bit in memory that determines its status. The status of the bit as-
signed to each condition determines, in turn, the execution condition for each
instruction up to a terminal instruction on the right side of the ladder diagram.
Glossary
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