OMRON CP1H PLC Practical Manual

Set parameters and monitoring status through a web browser (default IP 192.168.250.1, password "ETHERNET")

Support FINS/TCP traversal through routers (Internet)

Not supporting FTP, email, socket services

9.3 Memory Allocation

CIO area: m=2980+10 x (0xFD - Unit Address), occupying 3 words (Service Status, Error Status, TCP Connection Status)

DM area: n=32000+300 x (0xFD - unit address), occupying approximately 157 words (IP address, subnet mask, IP address table, IP router table, etc.)

Chapter 10: Program Debugging and Fault Diagnosis

10.1 Working mode

Program: does not execute the program, can modify or transmit the program

MONITOR: Execute program, can be forcibly set/reset, online editing

RUN: Execute program, prohibit forced operation

10.2 Debugging Tools

Force Set/Reset: Force ON/OFF of I/O bits, timer/counter completion flags, etc. in MONITOR mode

Differential monitoring: monitoring the rising or falling edge of a specific location

Online editing: Modify program segments in MONITOR mode, with an extended cycle time during the modification period (up to 26ms), and automatically backup to flash memory after modification (BKUP light on)

Data tracking: can be sampled at regular intervals, per cycle, or triggered by TRSM (045), with a maximum of 31 bits and 6 words

10.3 Misclassification

CPU Error (WDT): ERR/ALM red light on, RUN off, stop running (7-segment display frozen or no display)

Fatal error: ERR/ALM red light on, RUN off, stop running (7-segment displays error code)

Non fatal error: ERR/ALM red light flashing, continue running

Standby: RUN off, ERR/ALM not on, waiting for startup conditions to be met

10.4 Common fatal errors and their handling

Possible reasons for displaying incorrect names in paragraph 7 and handling them

80F1 → 0001 User Program Verification Error Program Damage Program Resend Program

80F1 → 0100 PLC Setup verification error, damaged settings, resend PLC Setup

80C0~80CF I/O bus error, poor connection of expansion unit, missing terminal cover, check connection, install terminal cover

80E9 Unit Number Duplicate CJ Unit Number Conflict Modification Unit Number

Reduce the number of expansion units from 80E1 to 6000 if there are more than 7 expansion units

80E1 → 4000 I/O word count exceeds limit, input or output word count exceeds 15, adjust expansion unit combination

80F0 → 0800 No END instruction in program. No END (001). Insert END at the end of the task

809F cycle time exceeds the monitoring time by optimizing the program or extending the monitoring time

C101~C2FF FALS instruction execution user-defined fatal error check FALS trigger conditions

10.5 Common Non fatal Errors

Possible reasons for displaying incorrect names in paragraph 7 and handling them

4101~42FF FAL instruction execution user-defined non fatal error check FAL trigger conditions

008B Interrupt Task Error: Repeatedly refreshing special I/O units, modifying programs, or disabling detection in interrupt tasks

009B PLC Setup setup error setting value out of range check A406 positioning error address

0200~020F CPU bus unit error, unit failure or communication abnormality, restart or replace unit

0300~035F Special I/O Unit Error Unit Fault Check Corresponding Unit

00F7 battery error, low battery voltage, battery replacement (CJ1W-BAT01)

00D1/00D2 option board error. Option board not installed or communication abnormal. Check installation and DIP switch

10.6 Interpretation of 7-segment LED Display

Error codes are displayed on two screens (e.g. 80F1 → 0001)

When multiple errors occur simultaneously, display the most severe one and clear it to display the next one

Special display: 8.0. → c.f. → 0. f. → 0. f. indicates I/O bus error (CJ unit, unknown location)

Chapter 11: Maintenance and Battery Replacement

11.1 Regular inspection items

Environmental temperature (0~55 ℃), humidity (10%~90%)

Power supply voltage fluctuation

Tightening condition of terminal screws

Operation of cooling fan (if any)

Battery status (A402.04 battery error flag)

11.2 Battery Replacement (CJ1W-BAT01)

Battery life: about 5 years at 25 ℃, about 1.5 years at 55 ℃

Replacement steps:

Power on for at least 5 minutes (to charge the capacitor)

Power off, complete replacement within 5 minutes

Open the battery cover, remove the old battery, and insert the new battery

Replace the battery cover and power on again

Automatically clear battery errors after replacement (if PLC Setup is set to detect battery)

Strictly prohibit: short circuit, charging, heating, dismantling, and burning of batteries

11.3 Battery free operation

Automatically save user programs, PLC Setup, etc. to flash memory

The initial value of DM can be saved to flash memory through CX Programmer and set to automatically load when powered on

HR area, DM area (non initial values), and counter PV do not maintain power when there is no battery, requiring program initialization