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CPU
S
pecifications
and
Operation
4--2
CPU Specifications and Operation
DL105 PLC User Manual, 3rd Edition
Introduction
The Central Processing Unit (CPU) is the heart of the Micro PLC. Almost all PLC
operations are controlled by the CPU, so it is important that it is set up correctly. This
chapter provides the information needed to understand:
S
Steps required to set up the CPU
S
Operation of ladder program, organization of Variable Memory
Output Circuit
Input Circuit
CPU
Comm.
Port
Main
Power
Supply
Auxiliary
+24VDC
Supply
To Programming
Device, or
10 Discrete Inputs
Commons
Commons
8 Discrete Outputs
+24VDC Out
Power Input
PLC
DL105
(AC--powered versions only)
Operator
Interface
NOTE:
The High-Speed I/O function (HSIO) consists of dedicated but configurable
hardware in the DL105. It is not considered part of the CPU, because it does not
execute the ladder program. For more on HSIO operation, see Chapter 3.
The DL105 Micro PLC which has 2.4K words of memory comprised of 2.0K of ladder
memory and 384 words of V-memory (data registers). Program storage is in the
FLASH memory which is a part of the CPU board in the PLC. In addition, there is
RAM with the CPU which will store system parameters, V-memory, and other data
which is not in the application program. The RAM is backed up by a
“super-capacitor”, storing the data for several days in the event of a power outage.
The capacitor automatically charges during powered operation of the PLC.
The DL105 supports fixed I/O which includes ten discrete input points and eight
output points. No provision for expansion beyond these eighteen I/O points are
available in the F1--130 model PLCs.
Over 90 different instructions are available for program development as well as
extensive internal diagnostics that can be monitored from the application program or
from an operator interface. Chapter 5 provides a detailed description of the
instructions.
The DL105 provides one built-in RS232C communication port, so you can easily
connect a handheld programmer or a personal computer without needing any
additional hardware.
DL105
CPU Features
Содержание DL105
Страница 2: ...DL105 PLC User Manual Manual Number D1 USER M...
Страница 308: ...1B DL105 Error Codes In This Appendix Error Code Table...
Страница 314: ...1C Instruction Execution Times In This Appendix Introduction Instruction Execution Times...
Страница 324: ...1D Special Relays In This Appendix DL105 PLC Special Relays...
Страница 327: ...1E PLC Memory In This Appendix DL105 PLC Memory...
Страница 329: ...1F European Union Directives CE In This Appendix European Union EU Directives Basic EMC Installation Guidelines...