Section 1-2
1-1
Features
The C500-LDP01-V1 Ladder Program I/O Unit executes a ladder program to
control external I/O independently of the PC. The ladder program contained in
the Unit is written by the user.
The C500-LDP01-V1 Ladder Program I/O Unit can be used with the following
SYSMAC C-series PCs: C500, C1000H, C2000H.
Applications Examples
•
External I/O can be controlled by the Ladder Program I/O Unit instead of the
PC.
•
The Ladder Program I/O Unit can be used as a timer.
•
The Ladder Program I/O Unit can be used as a high-speed input unit.
•
By controlling external inputs and outputs, the Ladder Program I/O Unit can
reduce the processing load handled by the PC.
C500 Instructions
The Ladder Program I/O Unit uses the same instructions as the C500, so ladder
programs can be constructed in the same way. A total of 49 different instructions
is available. (Not all C500 instructions are supported.)
The 16 DC inputs and 16 transistor outputs can be connected to external I/O de-
vices so the Unit can be used as for normal I/O operation. Of the 16 DC inputs, 8
inputs (2 groups of 4) can be set for high-speed inputs with a minimum pulse
width of 0.5 ms, so inputs shorter than the scan time can be detected.
The Unit connects to the PC through 16 input points and 16 output points, so
control signals can be passed back and forth between the PC and the Unit. Fur-
thermore, when the I/O WRITE and I/O READ (WRIT(87)/READ(88)) instruc-
tions are executed in the PC program, up to 32 words of data can be transferred
to or from the Unit.
A realtime clock is built into the Unit, so it can act as a timer and manage I/O
timing.
External I/O Points:
16 Input/16 Output
PC I/O Points:
16 Input and 16 Output
Built-in Realtime Clock
1-2
System Configuration
The following figure shows a typical system configuration:
GPC
Output devices
RS-485
connecting
cable
Input devices
Memory Pack
C500-MP303-EV2
The Unit can be programmed through the GPC with Memory Pack
C500-MP303-EV2, through the FIT, or through LSS running on an IBM AT/XT
compatible computer. Refer to
Appendix C Programming Instructions
for a list of
instructions. Online operations between the Unit and the GPC/FIT/LSS are pos-
sible in PROGRAM or MONITOR mode. They are not possible in RUN mode.
OMRON [ OMRON ELECTRONICS LLC ]
