OMRON C200H Series PLC (CPU01-E/03-E/11-E) Operating Instructions

Scope of application and safety regulations

Compatible Models

C200H CPU01‑E / 03‑E / 11‑E

Supporting I/O units, special function units, and linking units

Mandatory safety requirements

It is necessary to disconnect the power and disassemble the unit, connect the wiring, and set the DIP switch

Grounding resistance * * ≤ 100 Ω * * to prevent electric shock and interference

Emergency stop, interlock, and limit circuits must be configured externally

Output relay burnout/transistor breakdown may cause abnormal output, requiring external safety measures

Anti static: Release static electricity before contacting the unit

runtime environment

Temperature: 0~50 ℃, humidity: 20~90% RH, no condensation

Prohibited: direct sunlight, dust, corrosive gases, strong vibration, strong electromagnetic

Hardware structure and indicator lights

1. Definition of CPU indicator light

Meaning of indicator light status

POWER is constantly on and the power supply is normal

RUN is constantly on and running normally

ALARM flashing non fatal abnormality (low battery, cycle timeout)

ERROR is constantly on, indicating a fatal error. Stop running and output fully off

OUT INHIBIT constant light output disabled (SR25215=ON)

2. System architecture

Composed of CPU rack and up to 2 expansion I/O racks

Bottom plate: 3 slots, 5 slots, 8 slots

I/O allocates addresses by slot, with each slot occupying 1 IR word (16 dots)

Core memory area (mandatory)

All regions are managed by word (16 bit), with some supporting bit addressing.

Regional abbreviation address range, power failure maintenance purpose

Internal relay IR 000~235 No I/O point, internal coil

Special relay SR 236~255, partial system flags, clocks, errors

Auxiliary relay AR 00~27 is a dedicated symbol, error history, and clock

Data storage DM 0000~1999 refers to data storage and indirect addressing

Keep relay HR 00~99 in a power-off state

Timer/Counter TC 000~511 SV keeps timing and counting

Link relay LR 00~63 No PLC link data

Temporary relay TR 00~07, ladder diagram branch temporary storage

Key System Position (SR)

SR25315: First cycle flag (ON in the first cycle of startup)

SR25313: Constant ON; SR25314: Constant OFF

SR25212: I/O Status Hold Bit

SR25215: Output fully closed position

SR25503: Instruction execution error flag ER

Fundamentals of Programming

1. Programming method

Shape: Ladder Diagram

Text: Mnemonic mnemonic (directly input by programmer)

Tools: Handheld programmer, GPC, FIT, LSS software

2. Standard process

I/O allocation and address planning

Draw a ladder diagram

Convert to mnemonic symbol

Programmer writes into PLC

Grammar check → Run debugging → Optimize → Backup

3. Rules must be followed

END (01) must be added at the end of the program, otherwise it will not be executed

An output bit can only be driven in one OUT/SET/KEEP

TC numbers 000-511 can only be defined once (cannot be repeated)

Core instruction classification

1. Basic logic instructions

LD/LD NOT: Load normally open/normally closed

AND/AND NOT: series connection

OR/OR NOT: Parallel connection

AND LD/OR LD: Block Series/Block Parallel

OUT/OUT NOT: Output

DIFU (13)/DIFD (14): rising edge/falling edge (single cycle ON)

KEEP (11): Latch (Set/Reset)

2. Process control

IL (02)/ILC (03): Interlock, segment reset when conditions are not met

JMP (04)/JME (05): Jump, skip program without changing state

STEP/SNXT: Step Control (Sequential Process)

SBS/SBN/RET: Subroutine calls

3. Timing and Counting

TIM: 0.1s timer, set value 0~999.9s

TIMH (15): High speed timer

CNT: Down Counter

CNTR (12): reversible counter

4. Data processing

MOV/MVN: Transfer/Reverse Transfer

CMP: Comparison

ADD/SUB/MUL/DIV: BCD operation

ADB/SBB: Binary Operations

SFT/SFTR: Shift Register

Program Execution and Timing

1. Scanning mechanism

Input refresh → Program execution → Output refresh loop execution

The program executes from top to bottom according to the address

The input only refreshes at the beginning of the cycle, and the output only refreshes at the end of the cycle

2. Key timing indicators

Basic instruction execution: 0.4 μ s level

Scanning cycle: can be viewed on the programmer

SR25309 cycle error triggered over 100ms

Operation and Debugging (Programmer)

1. Core operations

Mode switching: Program, Monitor, RUN

Memory clearing: clearing programs, I/O, DM, HR, etc

I/O table registration: Match actual units, verify abnormal alarms

Program check: Level 3 syntax check, detecting circuit errors, duplicate outputs, etc

2. Monitoring function

Monitoring bit ON/OFF status

Timer/counter current value PV

Real time display of scanning time

Forced reset/reset position

3. Fault handling

Look at ERROR/ALARM lights

Read error codes and AR/SR error flags

Common reasons: program without END, mismatched I/O configuration, low battery, overload, short circuit

Key issues

Question 1: Which of the 8 memory regions of C200H can maintain data after power failure? What are their respective purposes?

Answer: The areas for power outage maintenance are AR, DM, HR, TC (SV).

HR: Save switch status, alarm, manual/automatic mode, and other states.

DM: Save parameters, formulas, cumulative values, error history, and support indirect addressing.

AR: Save system errors, communication status, clock, and number of power outages.

TC: The timer/counter set value SV is maintained, and the current value PV is not maintained.

Do not maintain: IR, SR, LR, TR, reset to zero after restart.

Question 2: IL/ILC and JMP/JME both skip program segments. What is the core difference between the two?

answer

IL (02)/IL (03) interlock: When the condition is OFF, OUT reset, TIM reset, CNT hold, KEEP hold within the section are used for safe disconnection.

JMP (04)/JME (05) Jump: When the condition is OFF, it completely skips and does not execute, and all output/timer/counter states are fully maintained for cycle optimization and selective execution.

Simple note: IL is “cut off reset”, JMP is “skip not move”.

Question 3: What are the three most common errors that cause C200H programs to not run or output abnormally? How to avoid it?

answer

Missing END (01) → The program does not execute at all; END must be added in the last line.

An output bit is driven multiple times by OUT → only the last one takes effect, and the previous logic fails; Only one OUT/SET/KEEP is allowed for one output.

TC number duplicate definition → Timer/counter malfunction; Each TC000~511 can only use TIM/TIMH/CNT/CNTR once.